Aitchison et al 2011 GR YTSZ dz data

06T01 lithic arkoseAge estimates (ma)

Analysis_#207Pb/206Pb 1!

207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T01-01 0.04715 0.00201 0.0567 0.00263 0.00872 0.00027 0.00236 56.3 99.08 56 2.52 56 1.74 56 1.74 006T01-02 0.04831 0.0014 0.09704 0.00339 0.01457 0.00044 0.00295 114.5 67.13 94 3.13 93.2 2.82 93.2 2.82 106T01-03 0.05399 0.00124 0.11505 0.00348 0.01546 0.00047 0.00301 370.6 50.9 110.6 3.17 98.9 2.97 98.9 2.97 1106T01-04 0.0488 0.00161 0.10121 0.00385 0.01504 0.00046 0.00339 138.2 75.66 97.9 3.55 96.3 2.94 96.3 2.94 206T01-05 0.0767 0.00216 0.08891 0.00302 0.00841 0.00026 0.00276 1113.5 55.27 86.5 2.82 54 1.65 54 1.65 3806T01-06 0.07843 0.00141 2.12221 0.05711 0.19627 0.00591 0.0512 1157.7 35.35 1156.1 18.57 1155.2 31.83 1232.8 35.71 006T01-07 0.05834 0.00179 0.07169 0.00259 0.00891 0.00027 0.00232 541.7 66.54 70.3 2.46 57.2 1.75 57.2 1.75 1906T01-08 0.05357 0.00219 0.06456 0.00289 0.00874 0.00027 0.00262 352.8 89.53 63.5 2.76 56.1 1.74 56.1 1.74 1206T01-09 0.09641 0.00311 0.11299 0.00418 0.0085 0.00027 0.00391 1555.7 59.34 108.7 3.81 54.6 1.7 54.6 1.7 5006T01-10 0.07645 0.0024 0.07987 0.00291 0.00758 0.00023 0.00268 1106.8 61.41 78 2.74 48.7 1.5 48.7 1.5 3806T01-11 0.06611 0.00306 0.14399 0.00708 0.0158 0.00051 0.00657 809.9 93.87 136.6 6.29 101 3.21 101 3.21 2606T01-12 0.0655 0.00194 0.07687 0.00271 0.00851 0.00026 0.00245 790.5 61.09 75.2 2.55 54.6 1.67 54.6 1.67 2706T01-13 0.06429 0.00167 0.07823 0.00254 0.00883 0.00027 0.00227 751.1 53.94 76.5 2.39 56.6 1.72 56.6 1.72 2606T01-14 0.04872 0.00173 0.05868 0.00236 0.00874 0.00027 0.00209 134.5 81.55 57.9 2.26 56.1 1.72 56.1 1.72 306T01-15 0.04756 0.00174 0.05589 0.0023 0.00852 0.00026 0.00204 76.9 85.44 55.2 2.21 54.7 1.68 54.7 1.68 106T01-16 0.05347 0.00188 0.1082 0.00431 0.01468 0.00045 0.00386 348.7 77.4 104.3 3.95 93.9 2.88 93.9 2.88 1006T01-17 0.22102 0.00546 0.54197 0.01667 0.01779 0.00055 0.01612 2988.1 39.21 439.7 10.98 113.6 3.51 113.6 3.51 7406T01-18 0.0491 0.00305 0.05802 0.00371 0.00857 0.00028 0.00343 152.4 139.44 57.3 3.56 55 1.81 55 1.81 406T01-19 0.08798 0.00199 0.11004 0.00329 0.00907 0.00028 0.00301 1382.1 42.73 106 3.01 58.2 1.76 58.2 1.76 4506T01-20 0.06324 0.00213 0.13522 0.0052 0.01551 0.00048 0.00472 716.4 69.99 128.8 4.65 99.2 3.05 99.2 3.05 2306T01-21 0.04797 0.00113 0.13566 0.00417 0.02051 0.00062 0.00355 96.8 56.18 129.2 3.73 130.9 3.92 130.9 3.92 -106T01-22 0.05072 0.00238 0.06724 0.00337 0.00962 0.0003 0.00307 212.9 86.8 105 4.25 100.3 3.09 100.3 3.09 406T01-23 0.05039 0.00194 0.1089 0.00465 0.01568 0.00049 0.00416 228.3 105.03 66.1 3.2 61.7 1.95 61.7 1.95 706T01-24 0.06481 0.00189 0.07899 0.00275 0.00884 0.00027 0.00248 768.1 60.25 77.2 2.59 56.7 1.73 56.7 1.73 2706T01-25 0.04726 0.00167 0.05282 0.00212 0.00811 0.00025 0.00187 62.1 82.72 52.3 2.04 52 1.6 52 1.6 106T01-26 0.05935 0.00173 0.12409 0.00436 0.01517 0.00046 0.0039 298.4 71 62.7 2.27 56.7 1.71 56.7 1.71 1006T01-27 0.0523 0.00167 0.06371 0.00238 0.00884 0.00027 0.00211 579.8 62.25 118.8 3.94 97 2.92 97 2.92 1806T01-28 0.04821 0.00162 0.09112 0.00354 0.01371 0.00042 0.00312 109.6 77.49 88.5 3.29 87.8 2.64 87.8 2.64 106T01-29 0.05774 0.00203 0.55002 0.02196 0.06909 0.00212 0.01984 519.8 75.04 445 14.39 430.7 12.77 430.7 12.77 306T01-30 0.06099 0.00189 0.12501 0.00456 0.01487 0.00045 0.00411 638.9 65.22 119.6 4.12 95.1 2.87 95.1 2.87 2006T01-31 0.05802 0.00203 0.07263 0.00289 0.00908 0.00028 0.00261 530.1 75.22 71.2 2.74 58.3 1.78 58.3 1.78 1806T01-32 0.08222 0.00265 0.11454 0.00428 0.0101 0.00031 0.00397 1250.7 61.82 110.1 3.9 64.8 1.98 64.8 1.98 4106T01-33 0.06753 0.00232 0.12563 0.00493 0.01349 0.00041 0.00452 854.1 69.86 120.2 4.44 86.4 2.64 86.4 2.64 2806T01-34 0.15536 0.0042 0.36598 0.01205 0.01709 0.00053 0.01152 2405.7 45.28 316.7 8.96 109.2 3.33 109.2 3.33 6606T01-35 0.05317 0.00125 0.13116 0.00405 0.01789 0.00054 0.00351 336 52.27 125.1 3.63 114.3 3.39 114.3 3.39 906T01-36 0.04694 0.00148 0.0431 0.0016 0.00666 0.0002 0.0014 46.1 73.8 42.8 1.55 42.8 1.29 42.8 1.29 006T01-37 0.04674 0.00207 0.03821 0.00183 0.00593 0.00018 0.00165 35.6 103.14 38.1 1.79 38.1 1.18 38.1 1.18 006T01-38 0.13977 0.00248 3.94487 0.1064 0.2047 0.00609 0.10031 2224.4 30.37 1622.9 21.85 1200.5 32.58 2394.4 30.98 2606T01-39 0.15725 0.00277 6.46274 0.17385 0.29809 0.00886 0.16499 2426.3 29.54 2040.8 23.65 1681.8 44.02 2426.3 29.54 1806T01-40 0.0572 0.00159 0.13898 0.00473 0.01762 0.00053 0.0042 498.7 60.54 132.1 4.22 112.6 3.37 112.6 3.37 1506T01-41 0.07062 0.00182 0.10343 0.00336 0.01062 0.00032 0.00304 946.5 51.89 99.9 3.09 68.1 2.04 68.1 2.04 3206T01-42 0.05809 0.00202 0.06751 0.00268 0.00843 0.00026 0.00242 532.5 74.87 66.3 2.54 54.1 1.65 54.1 1.65 1806T01-43 0.04846 0.00201 0.10511 0.00478 0.01573 0.00049 0.00429 121.8 94.85 101.5 4.39 100.6 3.08 100.6 3.08 106T01-44 0.06914 0.00125 1.08313 0.02943 0.11362 0.00338 0.02605 903 36.73 745.2 14.35 693.7 19.56 1084.4 36.83 706T01-45 0.05002 0.00145 0.10306 0.00361 0.01494 0.00045 0.00316 196.1 65.98 99.6 3.32 95.6 2.86 95.6 2.86 406T01-46 0.04722 0.00174 0.05532 0.0023 0.0085 0.00026 0.00204 59.8 86.01 54.7 2.21 54.5 1.66 54.5 1.66 006T01-47 0.08632 0.00203 0.13719 0.00422 0.01153 0.00035 0.00387 1345.4 44.81 130.5 3.77 73.9 2.21 73.9 2.21 4306T01-48 0.06219 0.0022 0.07401 0.00297 0.00863 0.00027 0.0027 680.6 73.9 72.5 2.81 55.4 1.69 55.4 1.69 2406T01-49 0.07176 0.0022 0.07943 0.00287 0.00803 0.00024 0.00263 979.2 61.17 77.6 2.7 51.5 1.57 51.5 1.57 3406T01-50 0.14162 0.00303 0.17995 0.00525 0.00922 0.00028 0.00497 2247.1 36.45 168 4.52 59.1 1.77 59.1 1.77 6506T01-51 0.05499 0.00107 0.50254 0.01419 0.06628 0.00198 0.01221 411.7 42.5 413.4 9.59 413.7 11.94 413.7 11.94 006T01-52 0.06694 0.00221 0.07943 0.00304 0.00861 0.00026 0.00278 835.9 67.45 77.6 2.86 55.2 1.68 55.2 1.68 2906T01-53 0.04886 0.00125 0.1446 0.00472 0.02147 0.00064 0.00408 140.9 59.21 137.1 4.19 136.9 4.07 136.9 4.07 006T01-54 0.04891 0.00189 0.12915 0.00557 0.01915 0.00059 0.00498 143.7 88.3 123.3 5.01 122.3 3.72 122.3 3.72 106T01-55 0.05236 0.00154 0.10764 0.00382 0.01491 0.00045 0.00337 301.3 65.52 103.8 3.5 95.4 2.86 95.4 2.86 806T01-56 0.04799 0.00126 0.10129 0.00336 0.01531 0.00046 0.0029 97.7 62.25 98 3.09 97.9 2.92 97.9 2.92 006T01-57 0.07033 0.0013 0.7569 0.02094 0.07806 0.00232 0.01862 938 37.54 572.2 12.1 484.5 13.9 484.5 13.9 1506T01-58 0.0756 0.00141 1.81816 0.05037 0.17444 0.0052 0.04517 1084.4 36.83 1052 18.15 1036.5 28.52 1270.8 39.51 106T01-59 0.04765 0.0022 0.08139 0.00404 0.01239 0.00039 0.00365 81.1 106.73 79.5 3.79 79.4 2.46 79.4 2.46 006T01-60 0.05842 0.00183 0.12273 0.00453 0.01524 0.00046 0.00407 545.7 66.9 117.5 4.1 97.5 2.94 97.5 2.94 1706T01-61 0.09301 0.0028 0.15425 0.0055 0.01203 0.00037 0.00513 1488.2 55.88 145.7 4.84 77.1 2.35 77.1 2.35 4706T01-62 0.04775 0.00186 0.05563 0.00242 0.00845 0.00026 0.00216 85.8 90.89 55 2.32 54.2 1.66 54.2 1.66 106T01-63 0.07237 0.00202 0.0879 0.003 0.00881 0.00027 0.00273 996.3 55.65 85.5 2.8 56.5 1.71 56.5 1.71 3406T01-64 0.05584 0.00224 0.0595 0.00264 0.00773 0.00024 0.0024 445.6 86.81 58.7 2.53 49.6 1.53 49.6 1.53 1606T01-65 0.08759 0.00312 0.22016 0.00884 0.01823 0.00057 0.00827 1373.4 66.89 202 7.35 116.5 3.59 116.5 3.59 4206T01-66 0.04812 0.00163 0.10848 0.00425 0.01635 0.0005 0.00375 105 78.23 104.6 3.89 104.6 3.16 104.6 3.16 006T01-67 0.05912 0.00199 0.07258 0.00282 0.0089 0.00027 0.00255 571.7 71.46 71.1 2.66 57.1 1.74 57.1 1.74 2006T01-68 0.05236 0.00123 0.11322 0.00351 0.01568 0.00047 0.00304 301.3 52.54 108.9 3.2 100.3 2.98 100.3 2.98 806T01-69 0.08307 0.00171 2.17609 0.06302 0.19 0.00568 0.05734 1270.8 39.51 1173.4 20.15 1121.4 30.79 1157.7 35.35 406T01-70 0.15433 0.00284 8.65398 0.23854 0.40671 0.01213 0.22641 2394.4 30.98 2302.2 25.09 2199.9 55.59 2426.3 29.54 406T01-71 0.06121 0.00169 0.13552 0.00461 0.01606 0.00049 0.00412 646.8 58.12 129 4.12 102.7 3.08 102.7 3.08 2006T01-72 0.06926 0.00224 0.07783 0.00293 0.00815 0.00025 0.00268 906.6 65.32 76.1 2.76 52.3 1.59 52.3 1.59 3106T01-73 0.1951 0.00536 0.26809 0.00891 0.00997 0.00031 0.0086 462.1 61.98 114.7 3.75 98.6 2.96 98.6 2.96 1406T01-74 0.08147 0.0015 2.27 0.06263 0.20209 0.00602 0.05661 2785.6 44.34 241.2 7.13 63.9 1.97 63.9 1.97 7406T01-75 0.05627 0.00159 0.11956 0.00413 0.01541 0.00047 0.00366 1232.8 35.71 1203 19.45 1186.5 32.28 2224.4 30.37 1

n=58

• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (those in italics are not considered further)

Isotope ratios

• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.

06T01

2200

1800

1400

1000

600

0.0

0.1

0.2

0.3

0.4

0.5

0 2 4 6 8 10

207Pb/235U

206 P

b/23

8 U

data-point error ellipses are 2!

06T01

550

450

350

250

150

50

0.00

0.02

0.04

0.06

0.08

0.10

0.0 0.2 0.4 0.6 0.8

207Pb/235U

206 P

b/23

8 U


06T01

140

100

60

20

0.000

0.004

0.008

0.012

0.016

0.020

0.024

0.00 0.04 0.08 0.12 0.16

207Pb/235U

206 P

b/23

8 U


06T02 lithic conglomerateAge estimates (ma)


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T02-01 0.05219 0.00189 0.06584 0.00269 0.00915 0.00028 0.00241 293.7 80.66 64.7 2.57 58.7 1.77 58.7 1.77 906T02-02 0.07739 0.00152 1.53496 0.04313 0.14385 0.00424 0.03889 1131.3 38.55 944.5 17.28 866.4 23.89 866.4 23.89 806T02-03 0.07144 0.00234 0.08635 0.00326 0.00877 0.00027 0.00299 970 65.4 84.1 3.05 56.3 1.7 56.3 1.7 3306T02-04 0.09687 0.00286 0.14595 0.00512 0.01093 0.00033 0.00479 1564.7 54.3 138.3 4.53 70.1 2.11 70.1 2.11 4906T02-05 0.07607 0.00149 1.4819 0.04163 0.14129 0.00416 0.03747 1096.9 38.73 923 17.03 852 23.52 852 23.52 806T02-06 0.07485 0.00144 1.52631 0.04248 0.1479 0.00436 0.03812 1064.5 38.12 941 17.07 889.2 24.46 889.2 24.46 606T02-07 0.14918 0.00269 8.20082 0.22238 0.3987 0.01172 0.21066 2336.6 30.61 2253.4 24.54 2163.1 54.02 2336.6 30.61 406T02-08 0.09644 0.0018 3.32709 0.09156 0.25021 0.00736 0.0842 1556.4 34.7 1487.4 21.48 1439.6 37.98 1556.4 34.7 306T02-09 0.05921 0.00135 0.75572 0.02288 0.09257 0.00274 0.02014 574.7 48.74 571.5 13.23 570.7 16.16 570.7 16.16 006T02-10 0.28411 0.00517 25.12538 0.683 0.64142 0.01888 0.66412 3385.6 28.06 3313.1 26.55 3194.6 74.17 3385.6 28.06 406T02-11 0.0796 0.00147 2.12042 0.058 0.19321 0.00568 0.05232 1187.1 35.98 1155.5 18.87 1138.7 30.7 1187.1 35.98 106T02-12 0.06757 0.00129 1.29366 0.03598 0.13887 0.00409 0.03189 855.3 39.28 842.9 15.93 838.2 23.14 838.2 23.14 106T02-13 0.07831 0.00197 0.26447 0.00843 0.02449 0.00073 0.0077 1154.7 49.04 238.3 6.77 156 4.59 156 4.59 3506T02-14 0.15763 0.00285 7.96529 0.21615 0.3665 0.01078 0.20537 2430.4 30.36 2227.1 24.48 2012.9 50.84 2430.4 30.36 1006T02-15 0.06632 0.00136 1.12248 0.03221 0.12275 0.00362 0.02859 816.6 42.26 764.2 15.41 746.4 20.79 746.4 20.79 206T02-16 0.12429 0.00229 6.1739 0.16874 0.36027 0.0106 0.15814 2018.7 32.31 2000.8 23.88 1983.4 50.24 2018.7 32.31 106T02-17 0.08747 0.00161 2.32883 0.06364 0.1931 0.00568 0.05796 1370.9 34.95 1221.1 19.41 1138.1 30.68 1370.9 34.95 706T02-18 0.06449 0.00137 1.06056 0.03099 0.11927 0.00352 0.02747 757.8 44.22 734.1 15.27 726.4 20.29 726.4 20.29 106T02-19 0.07571 0.00144 1.30669 0.03626 0.12518 0.00369 0.03257 1087.3 37.73 848.7 15.96 760.3 21.11 760.3 21.11 1006T02-20 0.08506 0.00156 1.70535 0.04655 0.14541 0.00428 0.04227 1316.8 35.24 1010.5 17.47 875.2 24.06 875.2 24.06 1306T02-21 0.05278 0.00223 0.06552 0.00301 0.009 0.00028 0.00273 319.1 93.18 64.4 2.87 57.8 1.76 57.8 1.76 1006T02-22 0.07818 0.0015 2.1941 0.06106 0.20356 0.006 0.05506 1151.3 37.63 1179.2 19.41 1194.4 32.11 1151.3 37.63 -106T02-23 0.16631 0.00298 12.3436 0.33362 0.53831 0.01582 0.3178 2520.8 29.78 2630.9 25.39 2776.4 66.28 2520.8 29.78 -606T02-24 0.16464 0.00295 10.21653 0.27631 0.45006 0.01323 0.26308 2503.9 29.88 2454.6 25.01 2395.5 58.79 2503.9 29.88 206T02-25 0.06875 0.00126 1.40396 0.03827 0.14812 0.00435 0.03392 891.1 37.31 890.6 16.17 890.4 24.45 890.4 24.45 006T02-26 0.0475 0.00122 0.11279 0.00359 0.01722 0.0005 0.00309 73.8 60.47 108.5 3.27 110.1 3.16 110.1 3.16 -106T02-27 0.05147 0.00212 0.06441 0.00288 0.00908 0.00027 0.00261 261.9 91.99 63.4 2.75 58.2 1.73 58.2 1.73 806T02-28 0.0599 0.00131 0.69729 0.02018 0.08444 0.00244 0.01774 599.8 46.51 537.2 12.07 522.6 14.49 522.6 14.49 306T02-29 0.05733 0.00176 0.06712 0.0024 0.00849 0.00025 0.00215 503.7 66.49 66 2.28 54.5 1.59 54.5 1.59 1706T02-30 0.06093 0.00116 0.74984 0.02032 0.08926 0.00256 0.01776 636.8 40.61 568.1 11.79 551.2 15.18 551.2 15.18 306T02-31 0.0831 0.00174 1.53318 0.04335 0.13382 0.00386 0.03949 1271.6 40.16 943.8 17.38 809.6 21.97 809.6 21.97 1406T02-32 0.06363 0.00226 0.08838 0.0035 0.01007 0.0003 0.0032 729.5 73.49 86 3.27 64.6 1.91 64.6 1.91 2506T02-33 0.09564 0.00174 2.5751 0.06817 0.1953 0.00561 0.06256 1540.7 33.81 1293.6 19.36 1150 30.24 1540.7 33.81 1106T02-34 0.16733 0.00311 9.14795 0.24416 0.39653 0.01142 0.23274 2531.1 30.81 2352.9 24.43 2153 52.71 2531.1 30.81 806T02-35 0.06226 0.00246 0.08341 0.00359 0.00972 0.00029 0.0033 683.1 82.04 81.3 3.36 62.3 1.86 62.3 1.86 2306T02-36 0.07052 0.00134 1.41091 0.03818 0.14512 0.00417 0.03401 943.5 38.58 893.5 16.08 873.6 23.48 873.6 23.48 206T02-37 0.16429 0.00289 9.07531 0.23682 0.40066 0.01149 0.22533 2500.3 29.29 2345.6 23.87 2172.1 52.88 2500.3 29.29 706T02-38 0.08002 0.00187 2.25075 0.06752 0.20402 0.00593 0.06159 1197.4 45.34 1197 21.09 1196.9 31.73 1197.4 45.34 006T02-39 0.16616 0.00304 10.23102 0.2716 0.4466 0.01285 0.25875 2519.3 30.45 2455.9 24.55 2380.1 57.26 2519.3 30.45 306T02-40 0.07394 0.00132 1.72239 0.04529 0.16896 0.00485 0.04044 1039.8 35.69 1016.9 16.89 1006.4 26.73 1039.8 35.69 106T02-41 0.06056 0.0012 0.71732 0.01975 0.08591 0.00247 0.01728 623.7 42.06 549.1 11.68 531.3 14.67 531.3 14.67 306T02-42 0.05792 0.0021 0.06678 0.00269 0.00836 0.00025 0.00244 526.4 77.69 65.6 2.56 53.7 1.59 53.7 1.59 1806T02-43 0.10568 0.00193 4.33277 0.11491 0.29739 0.00854 0.10637 1726.1 33.15 1699.6 21.88 1678.3 42.45 1726.1 33.15 106T02-44 0.06405 0.00134 1.00457 0.02842 0.11376 0.00328 0.02514 743.2 43.55 706.1 14.4 694.6 18.98 694.6 18.98 206T02-45 0.04873 0.00124 0.09123 0.00289 0.01358 0.00039 0.0025 134.7 58.64 88.7 2.69 87 2.5 87 2.5 206T02-46 0.06277 0.00125 0.87405 0.02414 0.101 0.00291 0.02123 700.4 41.79 637.8 13.08 620.3 17.01 620.3 17.01 306T02-47 0.06991 0.00128 1.41637 0.0376 0.14695 0.00422 0.03338 925.7 37.12 895.8 15.8 883.8 23.71 883.8 23.71 106T02-48 0.08861 0.0017 2.17219 0.05884 0.17781 0.00512 0.05372 1395.7 36.18 1172.2 18.83 1055 28 1395.7 36.18 1006T02-49 0.04696 0.0015 0.05562 0.00205 0.00859 0.00025 0.0018 46.8 74.82 55 1.97 55.1 1.6 55.1 1.6 006T02-50 0.04761 0.00158 0.054 0.00205 0.00823 0.00024 0.00181 79.2 77.73 53.4 1.97 52.8 1.54 52.8 1.54 106T02-51 0.12282 0.00257 2.8882 0.08279 0.17056 0.005 0.07779 1997.6 36.67 1378.8 21.62 1015.2 27.56 1997.6 36.67 2606T02-52 0.07178 0.00215 0.08993 0.00318 0.00909 0.00027 0.00291 979.6 59.72 87.4 2.96 58.3 1.73 58.3 1.73 3306T02-53 0.15787 0.00284 8.44428 0.22681 0.38794 0.01129 0.21552 2433 30.21 2280 24.39 2113.3 52.42 2433 30.21 706T02-54 0.07128 0.00134 1.55456 0.04249 0.15818 0.00461 0.03788 965.4 37.83 952.3 16.89 946.7 25.64 946.7 25.64 106T02-55 0.09277 0.00273 0.13983 0.00488 0.01093 0.00033 0.00455 1483.1 54.98 132.9 4.34 70.1 2.09 70.1 2.09 4706T02-57 0.05802 0.00177 0.08217 0.00295 0.01027 0.00031 0.00264 530 65.17 80.2 2.77 65.9 1.95 65.9 1.95 1806T02-58 0.06097 0.00134 0.8691 0.02568 0.10339 0.00303 0.02265 638.1 46.71 635.1 13.95 634.3 17.68 634.3 17.68 006T02-59 0.06007 0.00167 0.06984 0.00236 0.00843 0.00025 0.00211 606.1 58.95 68.5 2.24 54.1 1.59 54.1 1.59 2106T02-60 0.11277 0.00322 0.14228 0.00485 0.00915 0.00027 0.00458 1844.6 50.84 135.1 4.31 58.7 1.75 58.7 1.75 5706T02-61 0.07464 0.0015 1.38318 0.03897 0.1344 0.00392 0.03505 1058.6 40.18 881.8 16.61 812.9 22.3 812.9 22.3 806T02-62 0.06627 0.00202 0.07745 0.00277 0.00848 0.00025 0.00252 814.8 62.34 75.7 2.61 54.4 1.61 54.4 1.61 2806T02-63 0.04974 0.00762 0.06172 0.00929 0.009 0.0004 0.00889 182.9 321.95 60.8 8.89 57.8 2.59 57.8 2.59 506T02-64 0.05771 0.00212 0.11258 0.00463 0.01415 0.00043 0.0042 518.6 79.03 108.3 4.23 90.6 2.71 90.6 2.71 1606T02-65 0.17801 0.00332 10.77247 0.2935 0.43892 0.01281 0.28069 2634.4 30.67 2503.7 25.31 2345.8 57.38 2634.4 30.67 606T02-66 0.06021 0.00123 0.71691 0.02036 0.08636 0.00252 0.01784 611.1 43.39 548.8 12.04 534 14.95 534 14.95 306T02-67 0.04884 0.00207 0.09861 0.00455 0.01465 0.00044 0.00411 140 96.72 95.5 4.21 93.7 2.82 93.7 2.82 206T02-68 0.15892 0.0029 8.01426 0.21645 0.36576 0.01065 0.2058 2444.2 30.59 2232.6 24.38 2009.4 50.28 2444.2 30.59 1006T02-69 0.19332 0.0036 11.73258 0.3192 0.44018 0.01284 0.30636 2770.6 30.19 2583.3 25.46 2351.5 57.49 2770.6 30.19 906T02-70 0.06169 0.00128 0.84672 0.02429 0.09955 0.00291 0.02138 663.3 43.92 622.8 13.36 611.8 17.05 611.8 17.05 206T02-71 0.05964 0.00141 0.75976 0.02333 0.09239 0.00271 0.02062 590.7 50.45 573.9 13.46 569.7 15.99 569.7 15.99 106T02-72 0.08604 0.00163 1.79233 0.04919 0.15109 0.0044 0.04479 1339 36.21 1042.7 17.89 907.1 24.66 907.1 24.66 1306T02-73 0.0784 0.00148 1.85388 0.05078 0.17151 0.005 0.04578 1157 36.95 1064.8 18.07 1020.4 27.49 1157 36.95 406T02-74 0.07822 0.00147 1.79353 0.04902 0.16631 0.00484 0.04418 1152.4 36.79 1043.1 17.82 991.7 26.77 991.7 26.77 506T02-75 0.12465 0.00229 5.22206 0.14143 0.30384 0.00885 0.13258 2023.9 32.21 1856.2 23.08 1710.3 43.75 2023.9 32.21 806T02-76 0.17629 0.00412 0.26106 0.00786 0.01074 0.00032 0.00754 2618.3 38.38 235.5 6.33 68.9 2.03 68.9 2.03 71

n=68

• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (those in italics are not considered further)

Isotope ratios

• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma

06T02

3400

3000

2600

2200

1800

1400

0.0

0.2

0.4

0.6

0.8

0 10 20 30

207Pb/235U

206 P

b/23

8 U


06T02

1500

1300

1100

900

700

500

300

1000.00

0.04

0.08

0.12

0.16

0.20

0.24

0.28

0 1 2 3

207Pb/235U

206 P

b/23

8 U


06T02

150

130

110

90

70

50

30

10

0.000

0.004

0.008

0.012

0.016

0.020

0.024

0.00 0.04 0.08 0.12 0.16

207Pb/235U

206 P

b/23

8 U


06T03 volcaniclastic conglomerateIsotope ratios Age estimates (ma)Analysis_#

207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! rho207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % disc

06T03-01 0.04768 0.00155 0.0775 0.00284 0.01179 0.00034 0.0025 82.7 76.2 75.8 2.68 75.6 2.14 75.6 2.14 006T03-02 0.04697 0.00091 0.04713 0.00125 0.00728 0.0002 0.00105 47.3 45.04 46.8 1.21 46.8 1.3 46.8 1.3 006T03-03 0.05425 0.00223 0.05988 0.00265 0.00801 0.00023 0.00242 381.3 89.34 59.1 2.54 51.4 1.48 51.4 1.48 1306T03-04 0.0484 0.00126 0.10087 0.00317 0.01512 0.00042 0.00275 706.1 57.95 80.1 2.52 60.7 1.71 60.7 1.71 2406T03-05 0.06294 0.00175 0.08213 0.00268 0.00947 0.00027 0.00241 119 60.23 97.6 2.92 96.7 2.7 96.7 2.7 106T03-06 0.06209 0.00119 0.72363 0.01902 0.08455 0.00235 0.01667 677.3 40.5 552.8 11.21 523.2 13.99 523.2 13.99 506T03-07 0.08611 0.00278 0.10518 0.00381 0.00886 0.00026 0.00355 1340.6 61.16 101.5 3.5 56.9 1.63 56.9 1.63 4406T03-08 0.06807 0.00125 1.34069 0.03449 0.1429 0.00397 0.03052 870.6 37.61 863.5 14.96 861 22.42 861 22.42 006T03-09 0.05077 0.00151 0.06165 0.00212 0.00881 0.00025 0.00187 230.3 67.46 60.7 2.03 56.5 1.59 56.5 1.59 706T03-10 0.04669 0.00162 0.06283 0.00242 0.00976 0.00028 0.00214 33.3 81.01 61.9 2.31 62.6 1.78 62.6 1.78 -106T03-11 0.05193 0.00149 0.05814 0.00195 0.00812 0.00023 0.00172 282.1 64.43 57.4 1.87 52.2 1.47 52.2 1.47 906T03-12 0.04333 0.0018 0.05747 0.00256 0.00962 0.00028 0.00228 0.1 0 56.7 2.46 61.7 1.77 61.7 1.77 -906T03-13 0.05286 0.00104 0.05511 0.00147 0.00756 0.00021 0.00126 322.9 43.95 54.5 1.41 48.6 1.35 48.6 1.35 1106T03-14 0.04553 0.00111 0.07023 0.00212 0.01119 0.00031 0.00181 0.1 30.92 68.9 2.01 71.7 1.99 71.7 1.99 -406T03-15 0.04792 0.00116 0.09996 0.003 0.01513 0.00042 0.00258 94.3 57.38 96.7 2.77 96.8 2.69 96.8 2.69 006T03-16 0.05904 0.00163 0.08385 0.00274 0.0103 0.00029 0.00245 568.4 59.15 81.8 2.56 66.1 1.86 66.1 1.86 1906T03-17 0.04711 0.00121 0.05422 0.00169 0.00835 0.00023 0.00146 54.5 60.58 53.6 1.63 53.6 1.5 53.6 1.5 006T03-18 0.06836 0.00265 0.07135 0.00298 0.00757 0.00022 0.00276 879.6 78.1 70 2.82 48.6 1.41 48.6 1.41 3106T03-19 0.05738 0.00172 0.06908 0.00239 0.00873 0.00025 0.00214 505.6 65.08 67.8 2.27 56.1 1.58 56.1 1.58 1706T03-20 0.05135 0.00172 0.06974 0.00263 0.00985 0.00028 0.00235 256.7 75.21 68.5 2.49 63.2 1.78 63.2 1.78 806T03-21 0.07592 0.00226 0.09248 0.00316 0.00884 0.00025 0.00291 1092.8 58.4 89.8 2.93 56.7 1.61 56.7 1.61 3706T03-22 0.13076 0.00232 0.11434 0.00289 0.00634 0.00018 0.00271 2108.2 30.79 109.9 2.63 40.8 1.13 40.8 1.13 6306T03-23 0.0516 0.00154 0.04999 0.00173 0.00703 0.0002 0.00153 267.8 67.22 49.5 1.67 45.2 1.27 45.2 1.27 906T03-24 0.05531 0.00178 0.06817 0.00249 0.00894 0.00025 0.00224 424.6 69.97 67 2.36 57.4 1.62 57.4 1.62 1406T03-25 0.05766 0.00189 0.06492 0.0024 0.00817 0.00023 0.00217 516.6 70.83 63.9 2.28 52.4 1.49 52.4 1.49 1806T03-26 0.05652 0.00128 0.13498 0.00389 0.01733 0.00048 0.00341 472 49.96 128.6 3.48 110.7 3.07 110.7 3.07 1406T03-27 0.2022 0.00352 0.23656 0.00585 0.00849 0.00023 0.00562 2844.1 28.05 215.6 4.8 54.5 1.49 54.5 1.49 7506T03-28 0.04795 0.00113 0.09544 0.00278 0.01444 0.0004 0.00238 95.5 55.84 92.6 2.58 92.4 2.54 92.4 2.54 006T03-29 0.04828 0.00167 0.04464 0.00171 0.00671 0.00019 0.00152 767.2 52.99 96.5 2.82 71.6 1.99 71.6 1.99 2606T03-30 0.06478 0.00166 0.09972 0.00306 0.01117 0.00031 0.00275 113.2 79.87 44.3 1.66 43.1 1.21 43.1 1.21 306T03-31 0.04783 0.00194 0.09175 0.00401 0.01391 0.0004 0.00361 89.9 94.59 89.1 3.73 89.1 2.52 89.1 2.52 006T03-32 0.04749 0.00115 0.10333 0.00307 0.01578 0.00044 0.00263 73.1 57.43 99.8 2.83 101 2.78 101 2.78 -106T03-33 0.05674 0.00233 0.05711 0.0025 0.0073 0.00021 0.00229 480.8 88.81 56.4 2.4 46.9 1.35 46.9 1.35 1706T03-34 0.10996 0.00202 0.28681 0.00727 0.01892 0.00052 0.00675 1798.7 33.08 256 5.74 120.8 3.3 120.8 3.3 5306T03-35 0.07741 0.00222 0.07716 0.00255 0.00723 0.0002 0.00235 1131.6 56.12 75.5 2.41 46.4 1.31 46.4 1.31 3906T03-36 0.04454 0.00158 0.04174 0.00163 0.0068 0.00019 0.00144 0.1 3.86 41.5 1.59 43.7 1.23 43.7 1.23 -506T03-37 0.05457 0.00101 0.05556 0.00141 0.00738 0.0002 0.00121 394.5 40.53 54.9 1.36 47.4 1.3 47.4 1.3 1406T03-38 0.05079 0.00201 0.04509 0.00192 0.00644 0.00018 0.00174 231.1 88.78 44.8 1.86 41.4 1.18 41.4 1.18 806T03-39 0.05349 0.00266 0.04894 0.00253 0.00664 0.0002 0.00233 349.5 108.33 48.5 2.44 42.6 1.26 42.6 1.26 1206T03-40 0.06218 0.00109 0.925 0.02299 0.10789 0.00297 0.02002 680.4 37.1 665 12.13 660.5 17.25 660.5 17.25 106T03-41 0.05309 0.00178 0.05929 0.00221 0.0081 0.00023 0.00198 332.4 74.3 58.5 2.12 52 1.46 52 1.46 1106T03-42 0.05207 0.00123 0.08075 0.00236 0.01125 0.00031 0.00205 288.6 53.1 78.9 2.22 72.1 1.99 72.1 1.99 906T03-43 0.04788 0.00141 0.04309 0.00146 0.00653 0.00018 0.00128 92.4 69.3 42.8 1.42 41.9 1.17 41.9 1.17 206T03-44 0.0574 0.00356 0.06197 0.00391 0.00783 0.00024 0.00367 2150.2 39.18 151.9 3.99 56.1 1.56 56.1 1.56 6306T03-45 0.13394 0.00304 0.16141 0.00456 0.00874 0.00024 0.00432 506.5 131.39 61 3.74 50.3 1.53 50.3 1.53 1806T03-46 0.04776 0.00154 0.05875 0.00213 0.00892 0.00025 0.00188 86.5 75.68 58 2.04 57.3 1.6 57.3 1.6 106T03-47 0.04922 0.00166 0.06089 0.00229 0.00897 0.00025 0.00204 158.1 77.18 60 2.19 57.6 1.61 57.6 1.61 406T03-48 0.04888 0.00166 0.05594 0.00211 0.0083 0.00023 0.00188 348.1 56.36 72.5 2.14 64.4 1.78 64.4 1.78 1106T03-49 0.05346 0.00135 0.07403 0.00226 0.01004 0.00028 0.00198 141.9 77.67 55.3 2.03 53.3 1.49 53.3 1.49 406T03-50 0.05641 0.00111 0.06164 0.00162 0.00792 0.00022 0.0014 468 43.51 60.7 1.55 50.9 1.4 50.9 1.4 1606T03-51 0.06612 0.00209 0.09088 0.00322 0.00997 0.00028 0.00294 810.1 64.64 88.3 3 63.9 1.8 63.9 1.8 2806T03-52 0.05567 0.00202 0.04968 0.00197 0.00647 0.00018 0.00179 438.9 78.92 49.2 1.91 41.6 1.18 41.6 1.18 1506T03-53 0.04477 0.00159 0.04322 0.0017 0.007 0.0002 0.0015 0.1 16.22 43 1.65 45 1.26 45 1.26 -506T03-54 0.04778 0.00146 0.06376 0.00222 0.00968 0.00027 0.00195 87.3 71.85 62.8 2.12 62.1 1.73 62.1 1.73 106T03-55 0.06028 0.00177 0.0811 0.00274 0.00976 0.00027 0.00247 613.6 62.35 79.2 2.58 62.6 1.75 62.6 1.75 2106T03-56 0.05865 0.00208 0.05234 0.00204 0.00647 0.00018 0.00186 554 75.55 51.8 1.97 41.6 1.18 41.6 1.18 2006T03-57 0.07286 0.0018 0.09938 0.00298 0.00989 0.00028 0.0027 1010.1 48.96 96.2 2.75 63.5 1.76 63.5 1.76 3406T03-58 0.04061 0.00188 0.04395 0.00215 0.00785 0.00022 0.00193 0.1 0 43.7 2.1 50.4 1.42 50.4 1.42 -1506T03-59 0.04464 0.0015 0.05375 0.00201 0.00873 0.00025 0.00176 85 52.73 71.2 1.94 70.8 1.95 70.8 1.95 106T03-60 0.04827 0.00135 0.06922 0.00226 0.0104 0.00029 0.00197 1550.1 43.5 113.3 3.11 57.2 1.59 57.2 1.59 5006T03-61 0.04773 0.00106 0.07267 0.00205 0.01104 0.00031 0.00174 0.1 4.54 53.2 1.93 56.1 1.57 56.1 1.57 -506T03-62 0.09612 0.00226 0.11805 0.00342 0.00891 0.00025 0.00317 112.7 64.59 68 2.15 66.7 1.85 66.7 1.85 2

n=50

• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (those in italics are not considered further)

• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.

• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

06T03

160

140

120

100

80

60

40

200.002

0.006

0.010

0.014

0.018

0.022

0.026

0.00 0.04 0.08 0.12 0.16

207Pb/235U

206 P

b/23

8 U


06T03

650

550

450

350

250

150

50

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.0 0.2 0.4 0.6 0.8 1.0

207Pb/235U

206 P

b/23

8 U


06T04 volcaniclastic lithareniteAge estimates (ma)


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T04-01 0.05978 0.00224 0.14272 0.00585 0.01731 0.0005 0.00535 595.1 79.81 135.5 5.2 110.7 3.17 110.7 3.17 1806T04-02 0.04925 0.00207 0.12194 0.00551 0.01796 0.00052 0.00499 159.6 95.61 116.8 4.98 114.7 3.3 114.7 3.3 206T04-03 0.05219 0.00145 0.1338 0.00439 0.01859 0.00053 0.00386 293.8 62.12 127.5 3.94 118.8 3.34 118.8 3.34 706T04-04 0.06434 0.00157 0.14331 0.00431 0.01616 0.00046 0.00385 752.8 50.64 136 3.83 103.3 2.9 103.3 2.9 2406T04-05 0.08864 0.00188 0.20413 0.00565 0.0167 0.00047 0.00518 1396.3 40.06 188.6 4.77 106.8 2.98 106.8 2.98 4306T04-06 0.03932 0.00167 0.08829 0.00406 0.01629 0.00046 0.0036 0.1 0 85.9 3.78 104.2 2.92 104.2 2.92 -2106T04-07 0.17442 0.003 12.50551 0.31314 0.52003 0.01452 0.29862 2600.5 28.43 2643.1 23.54 2699.3 61.58 2600.5 28.43 -206T04-08 0.04796 0.00103 0.11608 0.00325 0.01756 0.00049 0.00276 96.1 51.33 111.5 2.96 112.2 3.12 112.2 3.12 -106T04-09 0.05087 0.00105 0.18438 0.00504 0.02629 0.00074 0.0043 235.1 46.77 171.8 4.32 167.3 4.63 167.3 4.63 306T04-10 0.07234 0.00209 0.18773 0.00631 0.01882 0.00054 0.00577 995.5 57.72 174.7 5.39 120.2 3.41 120.2 3.41 3106T04-11 0.35631 0.00731 1.05697 0.02828 0.02152 0.00061 0.02767 3734.2 30.84 732.3 13.96 137.2 3.88 137.2 3.88 8106T04-12 0.05042 0.00121 0.14134 0.00423 0.02033 0.00057 0.00366 214.6 54.8 134.2 3.76 129.7 3.62 129.7 3.62 306T04-13 0.0687 0.00224 0.16465 0.00602 0.01738 0.0005 0.00552 889.8 65.79 154.8 5.25 111.1 3.18 111.1 3.18 2806T04-14 0.05357 0.00114 0.1194 0.00332 0.01616 0.00045 0.00287 353.1 46.98 114.5 3.01 103.4 2.88 103.4 2.88 1006T04-15 0.08828 0.00198 0.19617 0.0056 0.01612 0.00046 0.00514 1388.5 42.33 181.9 4.75 103.1 2.89 103.1 2.89 4306T04-16 0.13715 0.00379 0.32747 0.01053 0.01732 0.0005 0.01003 2191.6 47.31 287.6 8.06 110.7 3.18 110.7 3.18 6206T04-17 0.08701 0.00288 0.21436 0.00789 0.01787 0.00052 0.00737 1360.7 62.34 197.2 6.6 114.2 3.3 114.2 3.3 4206T04-18 0.0478 0.00118 0.08873 0.0027 0.01346 0.00038 0.00232 88.6 58.43 86.3 2.52 86.2 2.41 86.2 2.41 006T04-19 0.06847 0.00155 0.14328 0.00412 0.01518 0.00043 0.00369 882.9 46.01 136 3.66 97.1 2.71 97.1 2.71 2906T04-20 0.07898 0.00171 0.15709 0.0044 0.01443 0.00041 0.00399 1171.6 42.27 148.2 3.86 92.3 2.58 92.3 2.58 3806T04-21 0.05732 0.00137 0.12034 0.00357 0.01523 0.00043 0.00314 503.3 52.1 115.4 3.24 97.4 2.73 97.4 2.73 1606T04-22 0.12026 0.00278 0.25976 0.00751 0.01567 0.00045 0.00706 1960.2 40.68 234.5 6.06 100.2 2.83 100.2 2.83 5706T04-23 0.07107 0.00188 0.17662 0.0056 0.01803 0.00051 0.00509 959.3 53.2 165.2 4.83 115.2 3.24 115.2 3.24 3006T04-24 0.07949 0.00289 0.2115 0.0084 0.0193 0.00056 0.00784 1184.5 70.18 194.8 7.04 123.2 3.57 123.2 3.57 3706T04-25 0.04782 0.0011 0.12542 0.00366 0.01902 0.00053 0.00313 89.2 54.81 120 3.3 121.5 3.38 121.5 3.38 -106T04-26 0.04907 0.00188 0.11933 0.005 0.01764 0.00051 0.00449 151.4 87.51 114.5 4.53 112.7 3.22 112.7 3.22 206T04-27 0.05652 0.00161 0.1433 0.00478 0.01839 0.00052 0.00426 471.9 62.11 136 4.25 117.5 3.31 117.5 3.31 1406T04-28 0.04961 0.00118 0.09953 0.00296 0.01455 0.00041 0.00255 176.6 54.7 96.3 2.74 93.1 2.6 93.1 2.6 306T04-29 0.09856 0.00182 3.32235 0.08579 0.2445 0.00685 0.07894 1597 34.03 1486.3 20.15 1410 35.47 1597 34.03 506T04-30 0.05855 0.0019 0.14737 0.00538 0.01826 0.00052 0.00486 550.2 69.2 139.6 4.76 116.6 3.32 116.6 3.32 1606T04-31 0.31571 0.00678 1.44909 0.03972 0.03329 0.00095 0.03877 3549.1 32.67 909.5 16.47 211.1 5.95 211.1 5.95 7706T04-32 0.07119 0.00225 0.13487 0.00482 0.01374 0.0004 0.00442 962.9 63.31 128.5 4.31 88 2.53 88 2.53 3206T04-33 0.05378 0.00125 0.1467 0.00428 0.01978 0.00056 0.00372 361.6 51.71 139 3.79 126.3 3.53 126.3 3.53 906T04-34 0.05542 0.00154 0.10808 0.00354 0.01414 0.0004 0.00314 429 60.4 104.2 3.24 90.5 2.56 90.5 2.56 1306T04-35 0.05089 0.00143 0.12066 0.00398 0.01719 0.00049 0.00349 236.1 63.39 115.7 3.6 109.9 3.1 109.9 3.1 506T04-36 0.05428 0.00171 0.13364 0.00478 0.01785 0.00051 0.00427 382.7 69.2 127.4 4.28 114.1 3.25 114.1 3.25 1006T04-37 0.04808 0.00119 0.10063 0.00306 0.01518 0.00043 0.00263 103.4 57.57 97.4 2.82 97.1 2.73 97.1 2.73 006T04-38 0.05229 0.00126 0.14642 0.00437 0.0203 0.00057 0.0038 298.3 53.99 138.7 3.87 129.6 3.63 129.6 3.63 706T04-39 0.0528 0.00136 0.12079 0.00376 0.01659 0.00047 0.00329 320.2 57.41 115.8 3.41 106.1 2.98 106.1 2.98 806T04-40 0.04881 0.00127 0.12018 0.00377 0.01785 0.0005 0.00327 138.8 59.95 115.2 3.42 114.1 3.2 114.1 3.2 106T04-41 0.04948 0.00161 0.1211 0.00444 0.01775 0.00051 0.00393 170.5 74.16 116.1 4.02 113.4 3.22 113.4 3.22 206T04-42 0.06073 0.0014 0.13693 0.00398 0.01635 0.00046 0.00352 629.6 48.96 130.3 3.55 104.6 2.93 104.6 2.93 2006T04-43 0.04785 0.00133 0.10201 0.00335 0.01546 0.00044 0.00291 90.8 65.68 98.6 3.08 98.9 2.79 98.9 2.79 006T04-44 0.04986 0.00149 0.12027 0.00415 0.01749 0.0005 0.00365 188.5 68.14 115.3 3.76 111.8 3.16 111.8 3.16 306T04-45 0.04939 0.00184 0.11887 0.00487 0.01745 0.0005 0.00437 166.6 84.61 114 4.42 111.5 3.15 111.5 3.15 206T04-46 0.0516 0.00127 0.10463 0.00316 0.0147 0.00042 0.00274 267.5 55.31 101 2.9 94.1 2.64 94.1 2.64 706T04-47 0.05471 0.00159 0.11396 0.00385 0.0151 0.00043 0.00342 400.1 63.53 109.6 3.51 96.6 2.74 96.6 2.74 1206T04-48 0.05185 0.00126 0.13033 0.00392 0.01822 0.00052 0.0034 279 54.83 124.4 3.52 116.4 3.26 116.4 3.26 606T04-49 0.06473 0.00179 0.16235 0.00529 0.01819 0.00052 0.00477 765.5 57.25 152.8 4.62 116.2 3.29 116.2 3.29 2406T04-50 0.05076 0.00135 0.11043 0.00352 0.01578 0.00045 0.00307 229.8 60.46 106.4 3.22 100.9 2.84 100.9 2.84 506T04-51 0.04712 0.00131 0.09823 0.00322 0.01512 0.00043 0.00279 55 65.31 95.1 2.97 96.7 2.73 96.7 2.73 -206T04-52 0.05299 0.0012 0.14203 0.00408 0.01944 0.00055 0.00353 328.2 50.32 134.8 3.62 124.1 3.47 124.1 3.47 806T04-53 0.04708 0.00134 0.10787 0.00359 0.01661 0.00047 0.00312 53.2 66.8 104 3.29 106.2 3 106.2 3 -206T04-54 0.04791 0.00147 0.1166 0.00411 0.01765 0.0005 0.00361 93.9 72.28 112 3.74 112.8 3.18 112.8 3.18 -106T04-55 0.09495 0.00322 0.22258 0.00832 0.017 0.0005 0.00782 1527.1 62.61 204.1 6.91 108.7 3.17 108.7 3.17 4706T04-56 0.07726 0.00247 0.18754 0.00673 0.0176 0.00051 0.00622 1127.9 62.37 174.5 5.76 112.5 3.24 112.5 3.24 3606T04-57 0.0787 0.00159 1.76752 0.04756 0.16285 0.00459 0.04297 1164.6 39.45 1033.6 17.45 972.6 25.44 972.6 25.44 606T04-58 0.05123 0.00159 0.11707 0.00414 0.01657 0.00047 0.00367 251.2 69.79 112.4 3.77 105.9 3.01 105.9 3.01 606T04-59 0.0632 0.00307 0.14635 0.00743 0.01679 0.0005 0.00693 715.1 100.09 138.7 6.58 107.3 3.2 107.3 3.2 2306T04-60 0.06526 0.00167 0.15191 0.0047 0.01688 0.00048 0.00422 782.6 52.98 143.6 4.15 107.9 3.04 107.9 3.04 2506T04-61 0.05045 0.00165 0.12359 0.00455 0.01777 0.00051 0.00404 215.6 73.97 118.3 4.11 113.5 3.23 113.5 3.23 406T04-62 0.05655 0.00161 0.12127 0.00403 0.01555 0.00044 0.00359 473.2 61.79 116.2 3.65 99.5 2.81 99.5 2.81 14

n=48

• U/Pb and 206Pb/207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (those in italics are not considered further)

Isotope ratios

• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.

06T04

2600

2200

1800

1400

1000

0.0

0.1

0.2

0.3

0.4

0.5

0 2 4 6 8 10 12 14

207Pb/235U

206 P

b/23

8 U


06T04

200

180

160

140

120

100

80

60

0.008

0.012

0.016

0.020

0.024

0.028

0.032

0.06 0.10 0.14 0.18 0.22

207Pb/235U

206 P

b/23

8 U


06T05 conglomerateAge estimates (ma)

Analysis_#207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! rho

207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % disc06T05-01 0.05537 0.00122 0.6202 0.01807 0.08122 0.00235 0.01572 427.1 47.74 490 11.32 503.4 14 503.4 14 -306T05-02 0.08722 0.00166 2.2845 0.06197 0.18995 0.00547 0.0565 1365.3 36.24 1207.5 19.16 1121.1 29.66 1365.3 36.24 706T05-03 0.10021 0.00179 3.23758 0.08532 0.2343 0.00674 0.07858 1627.9 32.83 1466.2 20.44 1357 35.18 1627.9 32.83 706T05-04 0.08959 0.00174 2.00429 0.05486 0.16224 0.00468 0.05018 1416.6 36.69 1117 18.54 969.2 25.96 969.2 25.96 1306T05-05 0.09809 0.00176 2.87819 0.07601 0.2128 0.00612 0.06989 1588 33.17 1376.2 19.9 1243.7 32.52 1588 33.17 1006T05-06 0.12421 0.00225 5.66429 0.15008 0.33071 0.00952 0.14056 2017.5 31.76 1925.9 22.87 1841.8 46.1 2017.5 31.76 406T05-07 0.13709 0.00253 5.231 0.13969 0.27671 0.00797 0.13172 2190.8 31.71 1857.7 22.76 1574.8 40.25 2190.8 31.71 1506T05-08 0.07195 0.00169 0.83413 0.02519 0.08407 0.00244 0.02275 984.6 47.07 615.9 13.95 520.4 14.51 520.4 14.51 1606T05-09 0.11019 0.00195 4.56789 0.11999 0.30063 0.00864 0.11135 1802.5 31.89 1743.4 21.88 1694.5 42.82 1802.5 31.89 306T05-10 0.19249 0.00341 11.77984 0.3094 0.44379 0.01276 0.29664 2763.6 28.79 2587.1 24.58 2367.6 56.97 2763.6 28.79 806T05-11 0.07749 0.00143 1.65501 0.04419 0.15488 0.00446 0.03973 1134 36.12 991.5 16.9 928.2 24.87 928.2 24.87 606T05-12 0.0759 0.00138 1.39142 0.037 0.13295 0.00382 0.03318 1092.3 36.09 885.3 15.71 804.7 21.76 804.7 21.76 906T05-13 0.05451 0.00173 0.10247 0.00376 0.01363 0.0004 0.00336 391.9 68.93 99.1 3.46 87.3 2.55 87.3 2.55 1206T05-14 0.08119 0.00147 1.9176 0.05085 0.17128 0.00493 0.04592 1226.1 35.16 1087.2 17.7 1019.1 27.11 1226.1 35.16 606T05-15 0.07613 0.00156 1.06692 0.02991 0.10163 0.00294 0.02697 1098.5 40.34 737.2 14.69 624 17.18 624 17.18 1506T05-16 0.06303 0.00192 0.73915 0.02632 0.08504 0.0025 0.02382 709.4 63.42 561.9 15.36 526.1 14.86 526.1 14.86 606T05-17 0.07057 0.00146 1.27152 0.03587 0.13066 0.00377 0.0321 945.1 42.11 833.1 16.04 791.6 21.51 791.6 21.51 506T05-18 0.0804 0.00163 1.51324 0.04227 0.1365 0.00394 0.03833 1206.7 39.43 935.7 17.08 824.8 22.36 824.8 22.36 1206T05-19 0.10236 0.00187 3.77987 0.10068 0.26778 0.00771 0.09297 1667.4 33.49 1588.5 21.39 1529.5 39.19 1667.4 33.49 406T05-20 0.06721 0.00121 1.17664 0.03117 0.12697 0.00365 0.02752 844.1 37.13 789.7 14.54 770.5 20.88 770.5 20.88 206T05-21 0.0689 0.00136 1.0324 0.02845 0.10866 0.00313 0.02532 895.9 40.14 720.1 14.21 664.9 18.21 664.9 18.21 806T05-22 0.22918 0.00405 16.96988 0.44512 0.53697 0.01544 0.42968 3046.3 28 2933.1 25.15 2770.7 64.74 3046.3 28 606T05-23 0.06895 0.00222 0.07905 0.00292 0.00831 0.00025 0.00267 897.2 64.97 77.3 2.74 53.4 1.57 53.4 1.57 3106T05-24 0.07286 0.00142 1.51994 0.04168 0.15128 0.00436 0.03732 1010.1 39.04 938.5 16.79 908.1 24.42 908.1 24.42 306T05-25 0.07418 0.00137 1.55206 0.04153 0.15174 0.00437 0.03716 1046.3 36.84 951.3 16.52 910.7 24.44 910.7 24.44 406T05-26 0.05916 0.00108 0.79639 0.02119 0.09762 0.00281 0.01838 573.1 39.2 594.8 11.98 600.4 16.48 600.4 16.48 -106T05-27 0.07154 0.00138 1.26479 0.03455 0.12821 0.00369 0.03086 972.8 38.96 830.1 15.49 777.7 21.11 777.7 21.11 606T05-28 0.06149 0.00116 0.85956 0.02317 0.10137 0.00292 0.02025 656.5 39.78 629.9 12.65 622.4 17.07 622.4 17.07 106T05-29 0.10757 0.00203 3.35203 0.09055 0.22598 0.00651 0.08404 1758.7 34.15 1493.3 21.13 1313.4 34.26 1758.7 34.15 1206T05-30 0.07241 0.0013 1.46403 0.03869 0.14662 0.00421 0.03448 997.5 36.08 915.7 15.94 882 23.69 882 23.69 406T05-31 0.07135 0.00143 0.8373 0.0233 0.08511 0.00246 0.02084 967.4 40.5 617.7 12.88 526.5 14.59 526.5 14.59 1506T05-33 0.07148 0.00127 1.60195 0.0429 0.16249 0.00479 0.03811 971.1 35.86 971 16.74 970.6 26.55 970.6 26.55 006T05-34 0.05196 0.00141 0.07414 0.00247 0.01034 0.00031 0.00216 283.7 60.77 72.6 2.34 66.3 1.97 66.3 1.97 906T05-35 0.0803 0.00143 1.89488 0.05073 0.17109 0.00504 0.04569 1204.2 34.63 1079.3 17.79 1018.1 27.75 1204.2 34.63 606T05-36 0.07541 0.00135 1.73142 0.04645 0.16646 0.0049 0.04155 1079.5 35.44 1020.3 17.27 992.6 27.11 992.6 27.11 306T05-38 0.17659 0.00308 11.64427 0.30945 0.47807 0.01408 0.29537 2621.1 28.76 2576.2 24.85 2518.9 61.42 2621.1 28.76 206T05-39 0.08678 0.00154 1.60644 0.04297 0.1342 0.00395 0.03902 1355.7 33.83 972.7 16.74 811.8 22.47 811.8 22.47 1706T05-40 0.08344 0.00155 2.04032 0.05566 0.17728 0.00523 0.05043 1279.4 35.9 1129.1 18.59 1052.1 28.65 1279.4 35.9 706T05-41 0.07295 0.00139 1.67395 0.04615 0.16637 0.00491 0.04124 1012.5 38.11 998.7 17.53 992.1 27.15 992.1 27.15 106T05-42 0.08888 0.00156 2.81518 0.07489 0.22963 0.00676 0.06813 1401.6 33.1 1359.6 19.93 1332.5 35.45 1401.6 33.1 206T05-43 0.06078 0.00114 0.69507 0.01903 0.08292 0.00245 0.01658 631.3 39.83 535.8 11.4 513.5 14.56 513.5 14.56 406T05-44 0.12551 0.00224 4.91689 0.13177 0.28402 0.00837 0.1234 2036 31.22 1805.2 22.61 1611.6 42.04 2036 31.22 1106T05-45 0.06143 0.0014 0.68958 0.02083 0.08139 0.00241 0.01842 654.3 48.33 532.5 12.52 504.4 14.4 504.4 14.4 506T05-46 0.0632 0.00113 1.1484 0.03085 0.13175 0.00388 0.02697 714.8 37.61 776.5 14.58 797.8 22.11 797.8 22.11 -306T05-47 0.09224 0.00165 3.17611 0.08523 0.24963 0.00736 0.07787 1472.3 33.67 1451.4 20.72 1436.6 37.96 1472.3 33.67 106T05-48 0.07078 0.00125 1.98418 0.0529 0.20323 0.00599 0.04691 951.2 35.98 1110.1 18 1192.6 32.07 951.2 35.98 -706T05-49 0.06618 0.00151 0.89078 0.02684 0.09759 0.0029 0.02394 812 46.98 646.8 14.42 600.2 17.02 600.2 17.02 706T05-50 0.06384 0.0012 0.93501 0.02568 0.10619 0.00313 0.02255 736.3 39.42 670.3 13.47 650.6 18.26 650.6 18.26 306T05-51 0.07258 0.00131 1.60158 0.0432 0.15999 0.00472 0.03848 1002.2 36.31 970.8 16.86 956.7 26.21 956.7 26.21 106T05-52 0.0716 0.00127 1.68143 0.04496 0.17026 0.00502 0.03994 974.5 35.72 1001.5 17.03 1013.5 27.63 974.5 35.72 -106T05-53 0.0789 0.00155 1.55879 0.04364 0.14324 0.00424 0.0394 1169.5 38.54 954 17.32 863 23.88 863 23.88 1006T05-54 0.05661 0.00121 0.37877 0.01106 0.04851 0.00144 0.00962 475.7 47.2 326.1 8.14 305.3 8.83 305.3 8.83 606T05-55 0.06534 0.00135 0.38146 0.01092 0.04233 0.00125 0.00967 785.3 42.78 328.1 8.03 267.2 7.74 267.2 7.74 1906T05-56 0.07427 0.00136 1.53463 0.04165 0.1498 0.00442 0.03723 1048.8 36.58 944.4 16.68 899.9 24.77 899.9 24.77 506T05-57 0.06576 0.00123 0.69552 0.01904 0.07668 0.00226 0.01678 798.9 38.76 536.1 11.4 476.3 13.54 476.3 13.54 1106T05-58 0.05613 0.00115 0.32248 0.00922 0.04165 0.00123 0.00799 457.2 44.79 283.8 7.08 263.1 7.62 263.1 7.62 706T05-59 0.10654 0.002 3.6199 0.09921 0.24633 0.00728 0.09193 1741.1 33.99 1553.9 21.8 1419.5 37.65 1741.1 33.99 906T05-60 0.07102 0.0013 1.411 0.03825 0.14404 0.00425 0.034 957.9 36.99 893.6 16.11 867.5 23.93 867.5 23.93 306T05-61 0.04766 0.00157 0.09747 0.00374 0.01483 0.00044 0.0033 81.3 77.44 94.4 3.46 94.9 2.81 94.9 2.81 -106T05-62 0.04705 0.00205 0.10844 0.00515 0.01671 0.00051 0.00464 51.4 101.19 104.5 4.72 106.8 3.2 106.8 3.2 -206T05-63 0.067 0.00126 1.29862 0.03567 0.14053 0.00415 0.03152 837.7 38.82 845.1 15.76 847.7 23.44 847.7 23.44 0

n=59

• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (those in italics are not considered further)

Isotope ratios

06T05

3000

2600

2200

1800

1400

1000

0.0

0.2

0.4

0.6

0 4 8 12 16 20 24

207Pb/235U

206 P

b/23

8 U


06T06 volcaniclastic sandstone


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T06-01 0.04877 0.00158 0.05329 0.00194 0.00792 0.00023 0.00171 136.9 74.22 52.7 1.87 50.9 1.45 50.9 1.45 306T06-02 0.04663 0.00124 0.0888 0.00282 0.01381 0.00039 0.00243 30.3 61.73 86.4 2.63 88.4 2.48 88.4 2.48 -206T06-03 0.16715 0.00334 0.43539 0.01147 0.01889 0.00053 0.01094 2529.3 33.12 367 8.12 120.7 3.38 120.7 3.38 6706T06-04 0.05258 0.00133 0.10949 0.00335 0.0151 0.00043 0.00292 310.7 56.63 105.5 3.07 96.6 2.71 96.6 2.71 806T06-05 0.09541 0.00218 0.27782 0.00793 0.02112 0.0006 0.00733 1536.1 42.44 248.9 6.3 134.7 3.78 134.7 3.78 4606T06-06 0.05212 0.00124 0.10362 0.00304 0.01442 0.00041 0.00263 290.6 53.26 100.1 2.8 92.3 2.58 92.3 2.58 806T06-07 0.10994 0.00279 0.23529 0.00714 0.01552 0.00044 0.0067 1798.4 45.57 214.6 5.87 99.3 2.82 99.3 2.82 5406T06-08 0.41429 0.00748 1.43704 0.03595 0.02516 0.00071 0.03524 3961.8 26.79 904.5 14.98 160.2 4.46 160.2 4.46 8206T06-09 0.13346 0.00316 0.18435 0.00534 0.01002 0.00029 0.00505 2144 40.79 171.8 4.58 64.3 1.83 64.3 1.83 6306T06-10 0.06036 0.00154 0.15553 0.00477 0.01869 0.00053 0.00424 616.4 54.05 146.8 4.19 119.4 3.35 119.4 3.35 1906T06-11 0.05933 0.00174 0.079 0.00267 0.00966 0.00028 0.00239 579.2 62.63 77.2 2.51 62 1.76 62 1.76 2006T06-12 0.07957 0.00148 2.15808 0.05528 0.19673 0.00552 0.04976 1186.4 36.3 1167.7 17.77 1157.7 29.72 1186.4 36.3 106T06-13 0.05182 0.00167 0.07077 0.00257 0.00991 0.00028 0.00229 277.4 72.08 69.4 2.44 63.6 1.81 63.6 1.81 806T06-14 0.05204 0.0013 0.099 0.00301 0.0138 0.00039 0.00262 287 56.2 95.8 2.78 88.3 2.48 88.3 2.48 806T06-15 0.04709 0.00137 0.05876 0.00199 0.00905 0.00026 0.00173 53.6 68.55 58 1.9 58.1 1.64 58.1 1.64 006T06-16 0.07261 0.00235 0.15148 0.00549 0.01513 0.00044 0.00505 1003 64.38 143.2 4.84 96.8 2.77 96.8 2.77 3206T06-17 0.05534 0.00204 0.07275 0.00292 0.00953 0.00028 0.00264 425.9 79.77 71.3 2.77 61.2 1.76 61.2 1.76 1406T06-18 0.05295 0.00176 0.10689 0.00397 0.01464 0.00042 0.00355 326.6 73.51 103.1 3.64 93.7 2.67 93.7 2.67 906T06-19 0.0528 0.00142 0.07095 0.00226 0.00975 0.00028 0.00198 320.1 59.78 69.6 2.14 62.5 1.76 62.5 1.76 1006T06-20 0.05093 0.00124 0.11818 0.00352 0.01683 0.00048 0.00304 237.5 55.04 113.4 3.2 107.6 3.01 107.6 3.01 506T06-21 0.04504 0.00113 0.10423 0.00318 0.01679 0.00047 0.00271 0.1 6.55 100.7 2.93 107.3 3 107.3 3 -706T06-22 0.10105 0.0023 0.19525 0.00556 0.01402 0.0004 0.00516 1643.4 41.7 181.1 4.72 89.7 2.53 89.7 2.53 5006T06-23 0.05423 0.00133 0.06984 0.00209 0.00934 0.00026 0.00183 380.5 53.99 68.6 1.99 59.9 1.68 59.9 1.68 1306T06-24 0.05173 0.00134 0.1081 0.00336 0.01516 0.00043 0.00293 273.5 58.34 104.2 3.08 97 2.72 97 2.72 706T06-25 0.07674 0.00132 1.99616 0.04929 0.18869 0.00527 0.04402 1114.4 33.96 1114.2 16.7 1114.2 28.61 1114.4 33.96 006T06-26 0.05246 0.00182 0.0712 0.00273 0.00984 0.00028 0.00245 305.5 76.99 69.8 2.59 63.1 1.81 63.1 1.81 1006T06-27 0.05476 0.00144 0.13513 0.00424 0.0179 0.00051 0.00373 402.3 57.14 128.7 3.79 114.4 3.21 114.4 3.21 1106T06-28 0.04787 0.00151 0.09713 0.00346 0.01472 0.00042 0.00304 92 73.99 94.1 3.21 94.2 2.67 94.2 2.67 006T06-29 0.04898 0.00152 0.06055 0.00214 0.00897 0.00026 0.00188 146.8 71.41 59.7 2.05 57.6 1.63 57.6 1.63 406T06-30 0.04988 0.00151 0.12071 0.00418 0.01755 0.0005 0.00368 189.6 68.94 115.7 3.78 112.2 3.17 112.2 3.17 306T06-31 0.11346 0.00272 0.15265 0.00447 0.00976 0.00028 0.00419 1855.5 42.77 144.3 3.94 62.6 1.78 62.6 1.78 5706T06-32 0.05384 0.00118 0.15459 0.00433 0.02083 0.00059 0.00374 364.2 48.83 146 3.81 132.9 3.7 132.9 3.7 906T06-33 0.06809 0.00215 0.08696 0.00309 0.00926 0.00027 0.00282 871.3 63.95 84.7 2.89 59.4 1.7 59.4 1.7 3006T06-34 0.05938 0.00131 0.13403 0.00378 0.01637 0.00046 0.00332 580.9 47.38 127.7 3.39 104.7 2.91 104.7 2.91 1806T06-35 0.05045 0.00173 0.09742 0.00373 0.014 0.0004 0.00333 216 77.56 94.4 3.45 89.7 2.53 89.7 2.53 506T06-36 0.05842 0.00191 0.06805 0.0025 0.00845 0.00024 0.00226 545.6 69.73 66.8 2.38 54.2 1.54 54.2 1.54 1906T06-37 0.11388 0.00312 0.26146 0.00835 0.01665 0.00048 0.00787 1862.3 48.7 235.8 6.72 106.5 3.04 106.5 3.04 5506T06-38 0.05517 0.00185 0.06819 0.00255 0.00896 0.00026 0.00229 418.8 72.86 67 2.43 57.5 1.64 57.5 1.64 1406T06-39 0.07147 0.00267 0.09176 0.00372 0.00931 0.00027 0.00345 970.9 74.39 89.1 3.46 59.8 1.74 59.8 1.74 3306T06-40 0.0693 0.00253 0.08479 0.00336 0.00887 0.00026 0.0031 907.8 73.34 82.6 3.15 57 1.66 57 1.66 3106T06-41 0.08141 0.00195 1.08911 0.03211 0.09703 0.00275 0.02936 1231.3 46.04 748.1 15.61 597 16.13 597 16.13 2006T06-42 0.11278 0.00221 0.25411 0.00669 0.01634 0.00046 0.00623 1844.6 35.06 229.9 5.42 104.5 2.91 104.5 2.91 5506T06-43 0.06603 0.00258 0.08191 0.00344 0.009 0.00026 0.00318 807.4 79.72 79.9 3.23 57.7 1.68 57.7 1.68 2806T06-44 0.04861 0.00146 0.11034 0.00382 0.01646 0.00046 0.00336 129.2 69.04 106.3 3.49 105.3 2.95 105.3 2.95 106T06-45 0.05568 0.0014 0.12056 0.00368 0.0157 0.00044 0.00324 439.4 54.63 115.6 3.33 100.4 2.81 100.4 2.81 1306T06-46 0.07448 0.00136 0.91455 0.0233 0.08906 0.00249 0.02081 1054.2 36.66 659.5 12.36 550 14.71 550 14.71 1706T06-47 0.06043 0.00219 0.07509 0.00298 0.00901 0.00026 0.00272 618.8 76.32 73.5 2.82 57.8 1.66 57.8 1.66 2106T06-48 0.04656 0.00165 0.1045 0.00409 0.01628 0.00047 0.00362 26.5 82.97 100.9 3.76 104.1 2.96 104.1 2.96 -306T06-49 0.04739 0.00102 0.1088 0.00303 0.01665 0.00047 0.00256 68.2 51.23 104.9 2.78 106.5 2.96 106.5 2.96 -206T06-50 0.0478 0.00151 0.05973 0.00214 0.00906 0.00026 0.00188 88.5 74.4 58.9 2.05 58.2 1.65 58.2 1.65 106T06-51 0.05334 0.00187 0.06687 0.00259 0.00909 0.00026 0.00233 343.1 77.3 65.7 2.46 58.4 1.67 58.4 1.67 1106T06-52 0.07883 0.00191 0.17637 0.00525 0.01623 0.00046 0.00479 1168 47.36 164.9 4.53 103.8 2.91 103.8 2.91 3706T06-53 0.04704 0.00131 0.10539 0.00345 0.01625 0.00046 0.00299 50.7 65.63 101.7 3.17 103.9 2.91 103.9 2.91 -206T06-54 0.05182 0.00129 0.12145 0.00369 0.017 0.00048 0.00321 277.7 55.97 116.4 3.34 108.7 3.03 108.7 3.03 706T06-55 0.04716 0.00129 0.09556 0.00309 0.0147 0.00041 0.00268 57 64.2 92.7 2.86 94 2.63 94 2.63 -106T06-56 0.05291 0.00187 0.11707 0.00455 0.01605 0.00046 0.00409 325 78.25 112.4 4.14 102.6 2.93 102.6 2.93 906T06-57 0.06795 0.00121 1.22288 0.03085 0.13053 0.00364 0.02721 867.1 36.63 811.1 14.09 790.9 20.75 790.9 20.75 206T06-58 0.04921 0.00184 0.10494 0.00427 0.01547 0.00045 0.00382 157.7 85.06 101.3 3.92 98.9 2.84 98.9 2.84 206T06-59 0.07629 0.00384 0.1083 0.0056 0.0103 0.00032 0.00528 1102.6 97.45 104.4 5.13 66 2.02 66 2.02 3706T06-60 0.05447 0.00146 0.07012 0.00223 0.00934 0.00026 0.00197 390.4 58.61 68.8 2.12 59.9 1.68 59.9 1.68 1306T06-61 0.05071 0.00171 0.06195 0.00234 0.00886 0.00025 0.00209 227.7 76.14 61 2.23 56.9 1.61 56.9 1.61 706T06-62 0.04754 0.00139 0.10846 0.00367 0.01655 0.00047 0.0032 75.7 68.65 104.6 3.36 105.8 2.97 105.8 2.97 -106T06-63 0.05462 0.00162 0.11739 0.004 0.01559 0.00044 0.00356 396.9 64.27 112.7 3.64 99.7 2.81 99.7 2.81 1206T06-64 0.05685 0.00248 0.07225 0.00334 0.00922 0.00027 0.00307 484.9 94.14 70.8 3.16 59.2 1.72 59.2 1.72 16

n=49


Isotope ratios Age estimates (ma)


• U/Pb and 206Pb/207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

06T06

160

140

120

100

80

60

400.006

0.010

0.014

0.018

0.022

0.026

0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18

207Pb/235U

206 P

b/23

8 U


06T06

1100

900

700

500

300

100

0.00

0.04

0.08

0.12

0.16

0.20

0.0 0.4 0.8 1.2 1.6 2.0 2.4

207Pb/235U

206 P

b/23

8 U


06T07 volcaniclastic sandstone


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T07-01 0.05647 0.00148 0.1278 0.00403 0.01641 0.00047 0.00356 470 57.26 122.1 3.63 105 2.99 105 2.99 1406T07-02 0.05616 0.00144 0.12093 0.00376 0.01562 0.00045 0.00331 458.4 55.83 115.9 3.41 99.9 2.84 99.9 2.84 1406T07-03 0.04982 0.00144 0.10343 0.0035 0.01506 0.00043 0.00307 186.7 66.03 99.9 3.22 96.3 2.75 96.3 2.75 406T07-04 0.05588 0.00135 0.12421 0.00373 0.01612 0.00046 0.00327 447.2 52.62 118.9 3.37 103.1 2.93 103.1 2.93 1306T07-05 0.05601 0.00161 0.09395 0.00316 0.01217 0.00035 0.00281 452.2 62.49 91.2 2.93 78 2.24 78 2.24 1406T07-06 0.05756 0.00164 0.12529 0.00419 0.01578 0.00046 0.00373 512.9 61.82 119.9 3.78 101 2.89 101 2.89 1606T07-07 0.05602 0.00139 0.19541 0.00597 0.0253 0.00072 0.00525 452.9 54.08 181.2 5.07 161 4.56 161 4.56 1106T07-08 0.07774 0.00201 0.14429 0.0045 0.01346 0.00039 0.00411 1140.2 50.46 136.9 3.99 86.2 2.47 86.2 2.47 3706T07-09 0.21479 0.00477 0.62298 0.0175 0.02104 0.00061 0.01689 2942 35.41 491.7 10.95 134.2 3.85 134.2 3.85 7306T07-10 0.04999 0.00121 0.10703 0.00322 0.01553 0.00044 0.00278 194.6 55.24 103.2 2.95 99.3 2.82 99.3 2.82 406T07-11 0.06079 0.00218 0.12041 0.00475 0.01437 0.00042 0.00433 631.8 75.33 115.4 4.31 91.9 2.68 91.9 2.68 2006T07-12 0.0577 0.00204 0.12879 0.00503 0.01619 0.00047 0.00456 518.3 75.9 123 4.53 103.5 3.01 103.5 3.01 1606T07-13 0.05862 0.00164 0.10995 0.00363 0.0136 0.00039 0.00324 553 60.04 105.9 3.32 87.1 2.49 87.1 2.49 1806T07-14 0.07166 0.00369 0.16557 0.00877 0.01676 0.00052 0.00825 976.4 101.48 155.6 7.64 107.1 3.33 107.1 3.33 3106T07-15 0.06026 0.00148 0.1081 0.00329 0.01301 0.00037 0.00292 612.8 52.36 104.2 3.01 83.3 2.37 83.3 2.37 2006T07-16 0.05266 0.00132 0.09404 0.0029 0.01295 0.00037 0.00253 314.2 56.04 91.3 2.69 83 2.36 83 2.36 906T07-17 0.05012 0.00115 0.10647 0.00311 0.01541 0.00044 0.00267 200.6 52.58 102.7 2.85 98.6 2.79 98.6 2.79 406T07-18 0.07468 0.00228 0.16281 0.00569 0.01581 0.00046 0.00523 1059.8 60.35 153.2 4.97 101.1 2.93 101.1 2.93 3406T07-19 0.04888 0.00164 0.10242 0.00385 0.0152 0.00044 0.00341 142.1 76.74 99 3.55 97.2 2.8 97.2 2.8 206T07-20 0.05044 0.00128 0.11717 0.00363 0.01685 0.00048 0.00315 215.2 57.55 112.5 3.3 107.7 3.06 107.7 3.06 406T07-21 0.10585 0.00279 0.23842 0.00749 0.01634 0.00047 0.00702 1729.2 47.55 217.1 6.14 104.5 3.01 104.5 3.01 5206T07-22 0.10205 0.00268 0.22108 0.00694 0.01571 0.00046 0.00648 1661.8 47.91 202.8 5.77 100.5 2.89 100.5 2.89 5006T07-23 0.07556 0.002 0.17272 0.00547 0.01658 0.00048 0.00499 1083.3 52.07 161.8 4.73 106 3.03 106 3.03 3406T07-24 0.07807 0.00196 0.18234 0.00558 0.01694 0.00049 0.00509 1148.8 48.97 170.1 4.79 108.3 3.09 108.3 3.09 3606T07-25 0.05154 0.00115 0.11223 0.00322 0.01579 0.00045 0.00277 265.1 50.29 108 2.94 101 2.86 101 2.86 606T07-26 0.06451 0.00339 0.14587 0.00791 0.0164 0.00051 0.0074 758.5 107.25 138.3 7.01 104.9 3.24 104.9 3.24 2406T07-27 0.0569 0.00208 0.11411 0.00457 0.01454 0.00043 0.00414 487.2 79.26 109.7 4.17 93.1 2.72 93.1 2.72 1506T07-28 0.09012 0.00286 0.1233 0.00441 0.00992 0.00029 0.00412 1428 59.52 118.1 3.99 63.7 1.86 63.7 1.86 4606T07-29 0.05034 0.00119 0.09032 0.00268 0.01301 0.00037 0.00231 210.6 53.8 87.8 2.49 83.3 2.36 83.3 2.36 506T07-30 0.08534 0.00223 0.17344 0.00544 0.01474 0.00043 0.00501 1323.2 49.8 162.4 4.71 94.3 2.71 94.3 2.71 4206T07-31 0.18851 0.00399 0.51065 0.01404 0.01965 0.00057 0.01347 2729.2 34.44 418.9 9.44 125.4 3.58 125.4 3.58 7006T07-32 0.11874 0.00326 0.23983 0.00772 0.01465 0.00043 0.00729 1937.4 48.37 218.3 6.33 93.7 2.72 93.7 2.72 5706T07-33 0.05887 0.0013 0.11906 0.00342 0.01467 0.00042 0.003 562.4 47.55 114.2 3.11 93.9 2.65 93.9 2.65 1806T07-33 0.07966 0.00162 0.18155 0.00494 0.01653 0.00047 0.00447 1188.7 39.64 169.4 4.24 105.7 2.98 105.7 2.98 3806T07-34 0.05274 0.00137 0.11383 0.00361 0.01565 0.00045 0.00316 317.6 57.91 109.5 3.29 100.1 2.84 100.1 2.84 906T07-35 0.05057 0.00172 0.11013 0.00424 0.01579 0.00045 0.00379 221.2 77.02 106.1 3.88 101 2.88 101 2.88 506T07-36 0.0598 0.00118 0.64318 0.01741 0.07801 0.00221 0.0152 596.2 42.27 504.3 10.76 484.2 13.23 484.2 13.23 406T07-37 0.05052 0.0013 0.11795 0.00371 0.01693 0.00048 0.00323 219.2 58.51 113.2 3.37 108.2 3.07 108.2 3.07 406T07-38 0.07069 0.00235 0.15742 0.00587 0.01615 0.00047 0.0054 948.3 66.48 148.4 5.15 103.3 3 103.3 3 3006T07-39 0.0588 0.00159 0.13229 0.00429 0.01632 0.00047 0.00382 559.6 57.78 126.2 3.84 104.3 2.97 104.3 2.97 1706T07-40 0.07167 0.00235 0.17157 0.00633 0.01736 0.00051 0.00582 976.6 65.34 160.8 5.49 111 3.22 111 3.22 3106T07-41 0.25979 0.00518 0.94576 0.02542 0.0264 0.00076 0.02466 3245.4 31.05 675.9 13.26 168 4.75 168 4.75 7506T07-42 0.06273 0.00214 0.12503 0.00477 0.01446 0.00042 0.00435 699 71.14 119.6 4.31 92.5 2.69 92.5 2.69 2306T07-43 0.08969 0.00228 0.19007 0.0059 0.01537 0.00044 0.00546 1418.9 47.83 176.7 5.03 98.3 2.81 98.3 2.81 4406T07-44 0.05179 0.00111 0.11238 0.00318 0.01574 0.00045 0.00273 276.2 48.37 108.1 2.9 100.7 2.84 100.7 2.84 706T07-45 0.08062 0.00141 1.71754 0.04385 0.1545 0.00437 0.03948 1212.3 34.01 1015.1 16.38 926.1 24.39 926.1 24.39 906T07-46 0.05005 0.00111 0.1038 0.00299 0.01504 0.00043 0.00256 197.1 50.64 100.3 2.75 96.2 2.72 96.2 2.72 406T07-47 0.07513 0.00221 0.16455 0.00564 0.01588 0.00046 0.00518 1072 58.07 154.7 4.91 101.6 2.92 101.6 2.92 3406T07-48 0.05862 0.00151 0.12746 0.004 0.01577 0.00045 0.00355 552.8 55.11 121.8 3.6 100.9 2.87 100.9 2.87 1706T07-49 0.05176 0.00152 0.11646 0.00399 0.01632 0.00047 0.00352 274.9 65.71 111.9 3.63 104.3 2.98 104.3 2.98 706T07-50 0.13219 0.0024 5.43583 0.14092 0.29822 0.00845 0.13247 2127.3 31.38 1890.5 22.23 1682.5 41.98 2127.3 31.38 1106T07-51 0.062 0.0018 0.12931 0.00439 0.01513 0.00044 0.00395 674 60.86 123.5 3.95 96.8 2.77 96.8 2.77 2206T07-52 0.0588 0.00126 0.12059 0.00341 0.01487 0.00042 0.00299 559.6 46.15 115.6 3.09 95.2 2.69 95.2 2.69 1806T07-53 0.09063 0.00311 0.21239 0.00807 0.017 0.0005 0.00757 1438.8 64.12 195.6 6.76 108.6 3.2 108.6 3.2 4406T07-54 0.07345 0.0017 0.15866 0.00466 0.01567 0.00045 0.00421 1026.3 46.04 149.5 4.08 100.2 2.84 100.2 2.84 3306T07-55 0.29744 0.00724 0.80427 0.02369 0.01961 0.00058 0.02311 3457 37.26 599.2 13.33 125.2 3.66 125.2 3.66 7906T07-56 0.06027 0.00176 0.12487 0.00426 0.01503 0.00043 0.00383 613.2 61.77 119.5 3.85 96.1 2.75 96.1 2.75 2006T07-57 0.07397 0.00297 0.17569 0.0076 0.01723 0.00052 0.00708 1040.7 79.11 164.3 6.56 110.1 3.26 110.1 3.26 3306T07-58 0.12667 0.00291 0.25263 0.00736 0.01446 0.00042 0.00694 2052.3 40.07 228.7 5.96 92.6 2.64 92.6 2.64 6006T07-59 0.05776 0.00165 0.12097 0.00407 0.01519 0.00044 0.00363 520.6 61.63 116 3.68 97.2 2.78 97.2 2.78 1606T07-60 0.076 0.00212 0.15235 0.00502 0.01454 0.00042 0.0046 1095.1 54.77 144 4.42 93 2.67 93 2.67 3506T07-61 0.08365 0.00162 1.37742 0.0368 0.11942 0.00339 0.03341 1284.3 37.22 879.3 15.72 727.2 19.52 727.2 19.52 1706T07-62 0.06305 0.00176 0.12473 0.00413 0.01435 0.00041 0.00372 710 58.21 119.4 3.73 91.8 2.62 91.8 2.62 2306T07-63 0.09188 0.00236 0.20678 0.00645 0.01632 0.00047 0.00598 1464.8 48.11 190.8 5.43 104.4 2.99 104.4 2.99 45

n=40




• U/Pb and 206Pb/207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

06T07

2200

1800

1400

1000

600

0.0

0.1

0.2

0.3

0.4

0.5

0 2 4 6 8 10

207Pb/235U

206 P

b/23

8 U


06T07

200

180

160

140

120

100

80

60

0.008

0.012

0.016

0.020

0.024

0.028

0.032

0.06 0.10 0.14 0.18 0.22

207Pb/235U

206 P

b/23

8 U


06T08 volcaniclastic conglomerateAge estimates (ma)


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T08-01 0.05113 0.00113 0.10387 0.00301 0.01473 0.00042 0.00259 246.5 50.25 100.3 2.76 94.3 2.69 94.3 2.69 606T08-02 0.25393 0.00488 0.53954 0.01438 0.01541 0.00044 0.01394 3209.4 30.01 438.1 9.48 98.6 2.82 98.6 2.82 7706T08-03 0.04788 0.00112 0.10407 0.00311 0.01576 0.00045 0.00266 92.1 55.48 100.5 2.86 100.8 2.87 100.8 2.87 006T08-04 0.04792 0.00117 0.1123 0.00345 0.017 0.00049 0.00296 94.2 58.11 108.1 3.15 108.6 3.1 108.6 3.1 006T08-05 0.05185 0.00121 0.10981 0.00327 0.01536 0.00044 0.00283 278.8 52.43 105.8 2.99 98.3 2.8 98.3 2.8 706T08-06 0.06118 0.0016 0.12689 0.00405 0.01504 0.00044 0.00361 645.5 55.34 121.3 3.65 96.2 2.76 96.2 2.76 2106T08-07 0.05458 0.00113 0.12648 0.00353 0.01681 0.00048 0.00305 395 45.56 120.9 3.18 107.4 3.05 107.4 3.05 1106T08-08 0.04852 0.0013 0.09009 0.00292 0.01346 0.00039 0.00253 124.8 61.74 87.6 2.72 86.2 2.47 86.2 2.47 206T08-09 0.0528 0.00136 0.1112 0.00352 0.01527 0.00044 0.00308 320.2 57.57 107.1 3.22 97.7 2.8 97.7 2.8 906T08-10 0.04729 0.00116 0.09682 0.00298 0.01485 0.00043 0.00255 63.2 57.94 93.8 2.76 95 2.71 95 2.71 -106T08-11 0.05696 0.00155 0.12346 0.00405 0.01572 0.00045 0.0036 489.2 59.66 118.2 3.66 100.5 2.89 100.5 2.89 1506T08-12 0.04773 0.00116 0.09998 0.00306 0.01519 0.00044 0.00262 85.1 57.61 96.8 2.82 97.2 2.77 97.2 2.77 006T08-13 0.0479 0.00121 0.10038 0.00313 0.0152 0.00044 0.00269 93 59.62 97.1 2.89 97.2 2.78 97.2 2.78 006T08-14 0.05612 0.00157 0.11096 0.0037 0.01434 0.00042 0.00328 456.7 60.92 106.8 3.38 91.8 2.64 91.8 2.64 1406T08-15 0.05504 0.0014 0.1181 0.0037 0.01556 0.00045 0.00325 413.9 55 113.4 3.36 99.5 2.85 99.5 2.85 1206T08-16 0.04809 0.00125 0.10368 0.0033 0.01563 0.00045 0.00285 103.9 60.3 100.2 3.04 100 2.86 100 2.86 006T08-17 0.04847 0.00167 0.07511 0.00291 0.01124 0.00033 0.00258 122.2 79.33 73.5 2.75 72 2.1 72 2.1 206T08-18 0.04786 0.00163 0.09462 0.00364 0.01434 0.00042 0.00322 91.5 79.84 91.8 3.38 91.8 2.66 91.8 2.66 006T08-19 0.04801 0.00129 0.10345 0.00336 0.01563 0.00045 0.00291 98.7 63.42 100 3.09 100 2.86 100 2.86 006T08-20 0.05773 0.00145 0.09696 0.00301 0.01218 0.00035 0.00266 519.4 54.26 94 2.79 78 2.24 78 2.24 1706T08-21 0.04849 0.00118 0.10419 0.00318 0.01558 0.00045 0.00273 123.4 56.31 100.6 2.93 99.7 2.84 99.7 2.84 106T08-22 0.04773 0.00174 0.0953 0.00385 0.01448 0.00043 0.00342 85.1 84.94 92.4 3.57 92.7 2.7 92.7 2.7 006T08-23 0.04153 0.0014 0.08675 0.00333 0.01515 0.00044 0.00289 0.1 0 84.5 3.11 96.9 2.78 96.9 2.78 -1506T08-24 0.04795 0.00122 0.10273 0.00322 0.01554 0.00045 0.00277 95.9 60.19 99.3 2.97 99.4 2.84 99.4 2.84 006T08-25 0.05237 0.00126 0.11446 0.00348 0.01585 0.00046 0.00302 301.7 53.99 110 3.17 101.4 2.89 101.4 2.89 806T08-26 0.05286 0.00153 0.10657 0.00364 0.01462 0.00042 0.00322 322.8 64.37 102.8 3.34 93.6 2.69 93.6 2.69 906T08-27 0.04791 0.00145 0.0973 0.00343 0.01473 0.00043 0.003 93.9 71.29 94.3 3.18 94.2 2.71 94.2 2.71 006T08-28 0.04784 0.00106 0.10443 0.00303 0.01583 0.00045 0.00258 90.3 52.73 100.9 2.78 101.2 2.88 101.2 2.88 006T08-29 0.057 0.00156 0.14955 0.00491 0.01903 0.00055 0.00436 491 59.68 141.5 4.33 121.5 3.48 121.5 3.48 1406T08-30 0.05861 0.00151 0.12648 0.004 0.01565 0.00045 0.00355 552.7 55.42 120.9 3.61 100.1 2.87 100.1 2.87 1706T08-31 0.06485 0.0019 0.14081 0.00484 0.01575 0.00046 0.00438 769.5 60.63 133.8 4.31 100.7 2.91 100.7 2.91 2506T08-32 0.05087 0.00132 0.10662 0.00339 0.0152 0.00044 0.00295 234.8 58.91 102.9 3.11 97.3 2.78 97.3 2.78 506T08-33 0.05772 0.00188 0.09684 0.0036 0.01217 0.00036 0.00324 518.8 70.07 93.9 3.33 78 2.28 78 2.28 1706T08-34 0.0584 0.00191 0.09535 0.00356 0.01184 0.00035 0.00321 544.9 69.82 92.5 3.3 75.9 2.22 75.9 2.22 1806T08-35 0.04793 0.00134 0.10283 0.00346 0.01556 0.00045 0.00301 94.7 66.21 99.4 3.19 99.5 2.87 99.5 2.87 006T08-36 0.0544 0.00156 0.12028 0.00409 0.01604 0.00047 0.00362 387.7 62.71 115.3 3.71 102.6 2.97 102.6 2.97 1106T08-37 0.04864 0.00122 0.11019 0.00346 0.01643 0.00048 0.00298 130.4 58.12 106.1 3.16 105.1 3.02 105.1 3.02 106T08-38 0.06727 0.00151 0.1885 0.00553 0.02033 0.00059 0.00494 846.2 45.98 175.3 4.72 129.7 3.71 129.7 3.71 2606T08-39 0.04955 0.00199 0.11349 0.00498 0.01662 0.00049 0.00449 173.7 91.25 109.2 4.54 106.2 3.13 106.2 3.13 306T08-40 0.06563 0.00175 0.15384 0.005 0.017 0.0005 0.0045 794.5 54.98 145.3 4.4 108.7 3.14 108.7 3.14 2506T08-41 0.0482 0.00155 0.10991 0.00407 0.01654 0.00048 0.00359 108.9 74.13 105.9 3.72 105.8 3.06 105.8 3.06 006T08-42 0.07709 0.00199 0.17591 0.00558 0.01655 0.00048 0.0051 1123.5 50.5 164.5 4.81 105.8 3.06 105.8 3.06 3606T08-43 0.04845 0.00138 0.10637 0.00363 0.01593 0.00046 0.00317 121.3 65.97 102.6 3.33 101.9 2.94 101.9 2.94 106T08-44 0.1102 0.00347 0.18711 0.00672 0.01232 0.00037 0.00635 1802.7 56.28 174.2 5.75 78.9 2.35 78.9 2.35 5506T08-45 0.04934 0.00131 0.11258 0.00365 0.01655 0.00048 0.00317 164.2 60.77 108.3 3.33 105.8 3.04 105.8 3.04 206T08-46 0.04936 0.00135 0.10575 0.00349 0.01554 0.00045 0.00304 164.9 62.52 102.1 3.21 99.4 2.87 99.4 2.87 306T08-47 0.04296 0.00189 0.11085 0.00524 0.01872 0.00056 0.00468 0.1 0 106.7 4.79 119.5 3.52 119.5 3.52 -1206T08-48 0.08567 0.00227 0.18548 0.00597 0.01571 0.00046 0.00551 1330.7 50.44 172.8 5.11 100.5 2.92 100.5 2.92 4206T08-49 0.25267 0.0069 0.58331 0.01862 0.01675 0.00051 0.01811 3201.6 42.5 466.6 11.9 107.1 3.22 107.1 3.22 7706T08-50 0.05467 0.00142 0.11256 0.0036 0.01494 0.00043 0.00317 398.7 56.81 108.3 3.29 95.6 2.75 95.6 2.75 1206T08-51 0.04727 0.00116 0.09996 0.00309 0.01534 0.00044 0.00265 62.5 57.99 96.7 2.86 98.1 2.82 98.1 2.82 -106T08-52 0.05024 0.0012 0.11942 0.00364 0.01724 0.0005 0.00314 206.2 54.61 114.5 3.3 110.2 3.16 110.2 3.16 406T08-53 0.04796 0.00132 0.10736 0.00357 0.01624 0.00047 0.0031 96 65.01 103.6 3.27 103.8 2.99 103.8 2.99 006T08-54 0.04863 0.0011 0.10806 0.0032 0.01612 0.00046 0.00274 130.2 52.56 104.2 2.93 103.1 2.95 103.1 2.95 106T08-55 0.04525 0.00141 0.09435 0.00342 0.01513 0.00044 0.00298 0.1 31.76 91.6 3.17 96.8 2.8 96.8 2.8 -606T08-56 0.05813 0.00167 0.1252 0.00426 0.01562 0.00046 0.0038 534.2 62.09 119.8 3.85 99.9 2.9 99.9 2.9 1706T08-57 0.05014 0.00131 0.11142 0.00357 0.01612 0.00047 0.0031 201.5 59.4 107.3 3.27 103.1 2.97 103.1 2.97 406T08-58 0.04812 0.00122 0.10828 0.00343 0.01632 0.00047 0.00296 105.2 59.03 104.4 3.14 104.4 2.99 104.4 2.99 006T08-59 0.0538 0.00191 0.11191 0.00445 0.01509 0.00045 0.004 362.4 78.07 107.7 4.06 96.6 2.83 96.6 2.83 1006T08-60 0.04774 0.00155 0.10243 0.00382 0.01556 0.00046 0.00336 85.4 76.25 99 3.52 99.6 2.89 99.6 2.89 -106T08-61 0.05137 0.00129 0.11531 0.00361 0.01628 0.00047 0.00314 257.3 56.49 110.8 3.29 104.1 2.99 104.1 2.99 606T08-62 0.04797 0.00173 0.09902 0.00399 0.01498 0.00044 0.00355 96.4 84.18 95.9 3.69 95.8 2.79 95.8 2.79 006T08-63 0.048 0.00144 0.10711 0.00377 0.01619 0.00047 0.0033 98 70.63 103.3 3.46 103.5 3 103.5 3 006T08-64 0.04805 0.00128 0.10609 0.00345 0.01602 0.00046 0.00299 101.5 61.83 102.4 3.17 102.4 2.95 102.4 2.95 0

n=57

• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

Isotope ratios

• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (in italics are not considered further)

06T08

180

140

100

60

20

0.00

0.01

0.02

0.03

0.00 0.04 0.08 0.12 0.16 0.20

207Pb/235U

206 P

b/23

8 U


06T10 volcaniclastic granule conglomerate


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T010-02 0.04115 0.00259 0.10736 0.00661 0.01892 0.00026 0.00635 0.1 0 103.5 6.06 120.8 1.64 120.8 1.64 -1706T010-03 0.05758 0.00628 0.15194 0.01601 0.01914 0.00055 0.01546 513.3 223.64 143.6 14.11 122.2 3.5 122.2 3.5 1506T010-04 0.05172 0.00398 0.13185 0.00982 0.01849 0.00036 0.00946 272.9 167.03 125.8 8.81 118.1 2.29 118.1 2.29 606T010-05 0.04633 0.00143 0.1264 0.00377 0.01979 0.00016 0.00361 14.7 71.47 120.9 3.4 126.3 0.99 126.3 0.99 -406T010-06 0.04726 0.00205 0.13184 0.00556 0.02023 0.00022 0.00534 61.7 100.84 125.8 4.99 129.1 1.38 129.1 1.38 -306T010-07 0.04644 0.00127 0.12602 0.00333 0.01968 0.00014 0.00319 20.7 63.33 120.5 3 125.6 0.89 125.6 0.89 -406T010-08 0.04964 0.00175 0.13333 0.00456 0.01948 0.00018 0.00438 178.3 80.23 127.1 4.08 124.4 1.12 124.4 1.12 206T010-09 0.05004 0.00097 0.13516 0.00252 0.01959 0.00011 0.00241 196.6 44.39 128.7 2.26 125.1 0.7 125.1 0.7 306T010-10 0.04987 0.00342 0.12644 0.00842 0.01839 0.00031 0.00811 189.1 152.37 120.9 7.59 117.5 1.98 117.5 1.98 306T010-11 0.04802 0.01235 0.13877 0.03468 0.02096 0.00129 0.03339 99.1 517.7 131.9 30.92 133.7 8.13 133.7 8.13 -106T010-12 0.04929 0.00549 0.1524 0.01648 0.02243 0.00061 0.01587 161.5 241.66 144 14.52 143 3.84 143 3.84 106T010-13 0.07137 0.00475 0.19019 0.01215 0.01933 0.00037 0.01178 968.1 130.3 176.8 10.36 123.4 2.36 123.4 2.36 3006T010-14 0.06763 0.00402 0.18808 0.01075 0.02017 0.00034 0.01041 857.2 118.89 175 9.19 128.7 2.14 128.7 2.14 2606T010-15 0.06127 0.00285 0.17101 0.00765 0.02024 0.00026 0.00739 648.7 96.75 160.3 6.63 129.2 1.65 129.2 1.65 1906T010-16 0.05022 0.0026 0.14327 0.00718 0.02069 0.00027 0.00691 205.3 115.63 136 6.38 132 1.69 132 1.69 306T010-17 0.06013 0.0024 0.16217 0.00623 0.01956 0.00022 0.00601 608.2 83.99 152.6 5.45 124.9 1.36 124.9 1.36 1806T010-18 0.05214 0.00236 0.13557 0.00593 0.01886 0.00022 0.00571 291.7 100.06 129.1 5.3 120.4 1.4 120.4 1.4 706T010-19 0.0653 0.00378 0.17525 0.00976 0.01946 0.00032 0.00944 784.1 117.24 164 8.43 124.3 2.01 124.3 2.01 2406T010-20 0.0908 0.00691 0.24286 0.01751 0.0194 0.00048 0.01703 1442.2 138.59 220.8 14.31 123.9 3.04 123.9 3.04 4406T010-21 0.05167 0.00434 0.13356 0.01087 0.01875 0.00039 0.01048 271 181.5 127.3 9.74 119.7 2.49 119.7 2.49 606T010-22 0.04731 0.00209 0.12455 0.00534 0.01909 0.00021 0.00513 64.5 102.41 119.2 4.82 121.9 1.33 121.9 1.33 -206T010-23 0.04601 0.00252 0.12403 0.00661 0.01955 0.00026 0.00635 0.1 125.11 118.7 5.97 124.8 1.65 124.8 1.65 -506T010-24 0.04718 0.0017 0.13052 0.00457 0.02006 0.00019 0.00438 58.1 84.31 124.6 4.1 128.1 1.17 128.1 1.17 -306T010-25 0.05801 0.00406 0.15214 0.01029 0.01902 0.00036 0.00993 529.8 146.94 143.8 9.07 121.5 2.25 121.5 2.25 1606T010-26 0.04688 0.00286 0.12446 0.00737 0.01926 0.00029 0.00708 42.6 139.94 119.1 6.65 123 1.82 123 1.82 -306T010-27 0.04813 0.00257 0.12661 0.00656 0.01908 0.00025 0.00631 105.6 121.59 121 5.92 121.8 1.6 121.8 1.6 -106T010-28 0.04839 0.00382 0.13905 0.01066 0.02084 0.00041 0.01025 118.4 176.35 132.2 9.5 133 2.56 133 2.56 -106T010-29 0.04421 0.00268 0.12434 0.00733 0.0204 0.00029 0.00704 0.1 43.06 119 6.62 130.2 1.86 130.2 1.86 -906T010-30 0.0522 0.0026 0.14839 0.00717 0.02062 0.00027 0.0069 294.1 110.04 140.5 6.34 131.6 1.67 131.6 1.67 606T010-31 0.04836 0.00447 0.13479 0.0121 0.02022 0.00046 0.01164 116.9 204.63 128.4 10.82 129 2.9 129 2.9 006T010-32 0.04687 0.00191 0.12685 0.00502 0.01963 0.00019 0.00483 42.3 94.8 121.3 4.52 125.3 1.21 125.3 1.21 -306T010-33 0.04843 0.0034 0.13139 0.00896 0.01968 0.00033 0.00863 120.5 157.48 125.3 8.04 125.6 2.1 125.6 2.1 006T010-34 0.05037 0.00178 0.14042 0.00481 0.02022 0.00018 0.00463 212.1 79.8 133.4 4.28 129 1.12 129 1.12 306T010-35 0.05295 0.00335 0.14317 0.00876 0.01961 0.00032 0.00844 326.6 136.75 135.9 7.78 125.2 2.01 125.2 2.01 806T010-36 0.04661 0.00168 0.12748 0.00446 0.01984 0.00018 0.00428 29.4 84.29 121.8 4.02 126.6 1.11 126.6 1.11 -406T010-37 0.05899 0.00239 0.16269 0.00637 0.02 0.00022 0.00615 566.7 86 153.1 5.56 127.7 1.39 127.7 1.39 1706T010-38 0.03811 0.00154 0.1025 0.00404 0.0195 0.00018 0.00386 0.1 0 99.1 3.72 124.5 1.13 124.5 1.13 -2606T010-39 0.04804 0.00159 0.13021 0.00417 0.01966 0.00016 0.00401 101.1 76.35 124.3 3.75 125.5 1.04 125.5 1.04 -106T010-40 0.04397 0.00146 0.12115 0.00392 0.01998 0.00016 0.00376 0.1 0 116.1 3.55 127.5 1.02 127.5 1.02 -1006T010-41 0.04663 0.00239 0.07637 0.0038 0.01188 0.00015 0.00365 30.3 118.44 74.7 3.58 76.1 0.94 76.1 0.94 -206T010-42 0.0465 0.00274 0.12464 0.00715 0.01944 0.00026 0.00689 23.5 135.69 119.3 6.46 124.1 1.66 124.1 1.66 -406T010-43 0.06262 0.00292 0.17264 0.00774 0.02 0.00026 0.00748 695.4 96.27 161.7 6.7 127.6 1.62 127.6 1.62 2106T010-44 0.04297 0.00198 0.1148 0.00516 0.01938 0.00021 0.00495 0.1 0 110.3 4.7 123.7 1.33 123.7 1.33 -1206T010-45 0.04508 0.00115 0.12311 0.00306 0.01981 0.00013 0.00293 0.1 9.63 117.9 2.76 126.4 0.79 126.4 0.79 -706T010-46 0.03845 0.00246 0.10524 0.00657 0.01985 0.00027 0.0063 0.1 0 101.6 6.04 126.7 1.74 126.7 1.74 -2506T010-47 0.11192 0.00439 0.30182 0.01108 0.01956 0.00027 0.01081 1830.7 69.42 267.8 8.64 124.9 1.74 124.9 1.74 5306T010-48 0.04663 0.00138 0.12538 0.0036 0.0195 0.00014 0.00346 30.3 68.35 119.9 3.25 124.5 0.9 124.5 0.9 -406T010-49 0.08832 0.00324 0.24224 0.00842 0.01989 0.00024 0.00818 1389.4 68.64 220.3 6.88 127 1.49 127 1.49 4206T010-50 0.05023 0.00244 0.13751 0.00649 0.01986 0.00024 0.00625 205.6 109.09 130.8 5.79 126.7 1.53 126.7 1.53 306T010-51 0.05124 0.00316 0.13937 0.00833 0.01973 0.00031 0.00802 251.6 135.98 132.5 7.42 125.9 1.94 125.9 1.94 506T010-52 0.04903 0.00155 0.13104 0.00401 0.01938 0.00015 0.00386 149.4 72.35 125 3.6 123.8 0.96 123.8 0.96 106T010-53 0.04837 0.00239 0.10027 0.0048 0.01503 0.00019 0.00461 117.5 112.55 97 4.43 96.2 1.18 96.2 1.18 106T010-54 0.04402 0.00217 0.12141 0.00584 0.02 0.00023 0.00561 0.1 7.83 116.4 5.29 127.7 1.44 127.7 1.44 -1006T010-55 0.06099 0.00396 0.16499 0.01032 0.01962 0.00035 0.00997 638.8 133.9 155.1 8.99 125.3 2.22 125.3 2.22 1906T010-56 0.07583 0.00436 0.21379 0.01175 0.02045 0.00035 0.0114 1090.7 111.1 196.7 9.83 130.5 2.22 130.5 2.22 3406T010-57 0.06422 0.0027 0.17424 0.00705 0.01968 0.00023 0.00682 749 86.41 163.1 6.1 125.6 1.44 125.6 1.44 2306T010-58 0.04743 0.00293 0.13119 0.00789 0.02006 0.00029 0.0076 70.2 141.37 125.2 7.08 128 1.84 128 1.84 -206T010-59 0.05034 0.00232 0.13836 0.00618 0.01993 0.00023 0.00595 210.8 103.46 131.6 5.52 127.2 1.45 127.2 1.45 306T010-60 0.04717 0.00119 0.12778 0.00314 0.01965 0.00012 0.00302 57.6 59.7 122.1 2.83 125.4 0.78 125.4 0.78 -3

n=47





06T10

220

180

140

100

60

20

0.00

0.01

0.02

0.03

0.04

0.00 0.04 0.08 0.12 0.16 0.20 0.24 0.28

207Pb/235U

206 P

b/23

8 U


06T11 volcaniclastic granule conglomerateIsotope ratios Age estimates (ma)Analysis_#

207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! rho207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % disc

06T011-01 0.04773 0.00165 0.13546 0.00453 0.02059 0.00018 0.00435 84.9 80.77 129 4.06 131.4 1.13 131.4 1.13 -206T011-02 0.04987 0.00428 0.1374 0.01146 0.01998 0.00041 0.01105 188.9 188.08 130.7 10.23 127.6 2.58 127.6 2.58 206T011-03 0.05226 0.00568 0.17796 0.01877 0.0247 0.00067 0.0181 296.9 230.48 166.3 16.18 157.3 4.2 157.3 4.2 506T011-04 0.07283 0.002 0.20001 0.00526 0.01992 0.00016 0.0051 1009.2 54.67 185.1 4.45 127.1 1.02 127.1 1.02 3106T011-05 0.09204 0.00346 0.30888 0.01102 0.02434 0.0003 0.01072 1468.1 69.85 273.3 8.55 155 1.87 155 1.87 4306T011-06 0.08553 0.00167 0.21517 0.00402 0.01825 0.00011 0.00391 1327.5 37.48 197.9 3.36 116.6 0.71 116.6 0.71 4106T011-07 0.0486 0.00396 0.12454 0.00986 0.01859 0.00036 0.0095 128.5 181.28 119.2 8.9 118.7 2.3 118.7 2.3 006T011-08 0.05223 0.0021 0.13949 0.00544 0.01937 0.0002 0.00524 295.3 89.33 132.6 4.85 123.7 1.26 123.7 1.26 706T011-09 0.04665 0.00083 0.13254 0.00228 0.02061 0.0001 0.00218 31.3 41.55 126.4 2.04 131.5 0.64 131.5 0.64 -406T011-10 0.05771 0.00174 0.15651 0.00454 0.01967 0.00016 0.00438 518.4 64.93 147.6 3.99 125.6 1.01 125.6 1.01 1506T011-11 0.04715 0.00243 0.12776 0.0064 0.01965 0.00024 0.00616 56.5 118.83 122.1 5.76 125.5 1.51 125.5 1.51 -306T011-12 0.04996 0.00204 0.1348 0.00533 0.01957 0.0002 0.00513 193.3 92.06 128.4 4.77 124.9 1.25 124.9 1.25 306T011-13 0.0473 0.00066 0.08273 0.00111 0.01268 0.00005 0.00106 64 32.37 80.7 1.05 81.3 0.34 81.3 0.34 -106T011-14 0.07155 0.00209 0.18904 0.00531 0.01916 0.00016 0.00515 973.2 58.57 175.8 4.53 122.4 1.04 122.4 1.04 3006T011-15 0.04812 0.00123 0.13068 0.00324 0.0197 0.00013 0.00311 105.1 59.32 124.7 2.91 125.7 0.83 125.7 0.83 -106T011-16 0.04869 0.00224 0.13472 0.00603 0.02007 0.00022 0.00581 132.9 104.86 128.3 5.4 128.1 1.41 128.1 1.41 006T011-17 0.0625 0.00351 0.1797 0.00975 0.02085 0.00032 0.00943 691.4 115.57 167.8 8.39 133 2 133 2 2106T011-18 0.04994 0.00282 0.15089 0.00827 0.02191 0.0003 0.00797 192.4 126.22 142.7 7.3 139.7 1.91 139.7 1.91 206T011-19 0.05059 0.00505 0.14354 0.01389 0.02058 0.0005 0.01339 222.4 215.37 136.2 12.33 131.3 3.19 131.3 3.19 406T011-20 0.0635 0.00241 0.17863 0.00655 0.0204 0.00021 0.00634 724.9 78.64 166.9 5.64 130.2 1.33 130.2 1.33 2206T011-21 0.04968 0.00283 0.13199 0.00731 0.01927 0.00027 0.00704 180.2 127.82 125.9 6.56 123 1.71 123 1.71 206T011-22 0.05086 0.0015 0.13675 0.00391 0.0195 0.00015 0.00376 234.3 66.74 130.1 3.49 124.5 0.95 124.5 0.95 406T011-23 0.0511 0.00501 0.14168 0.01348 0.02011 0.00048 0.013 245.2 210.92 134.5 11.99 128.4 3.02 128.4 3.02 506T011-24 0.05101 0.00346 0.14352 0.00945 0.02041 0.00034 0.00911 241.2 149.22 136.2 8.39 130.2 2.14 130.2 2.14 406T011-25 0.05137 0.00209 0.13811 0.00545 0.0195 0.0002 0.00525 257.4 90.8 131.4 4.86 124.5 1.26 124.5 1.26 506T011-26 0.0485 0.00417 0.12753 0.01066 0.01907 0.00039 0.01027 123.5 190.72 121.9 9.6 121.8 2.45 121.8 2.45 006T011-27 0.04792 0.00127 0.13294 0.00342 0.02012 0.00014 0.00328 94.2 62.73 126.7 3.06 128.4 0.87 128.4 0.87 -106T011-28 0.05101 0.00204 0.13414 0.0052 0.01907 0.00019 0.00501 241.4 89.67 127.8 4.66 121.8 1.23 121.8 1.23 506T011-29 0.04952 0.0019 0.13008 0.00485 0.01905 0.00018 0.00467 172.3 87.05 124.2 4.35 121.7 1.11 121.7 1.11 206T011-30 0.04609 0.00199 0.12847 0.0054 0.02022 0.00021 0.00519 2.2 101.04 122.7 4.86 129 1.33 129 1.33 -506T011-31 0.05601 0.00395 0.1383 0.00944 0.01791 0.00032 0.00912 452.4 149.76 131.5 8.42 114.4 2.05 114.4 2.05 1306T011-32 0.05335 0.00601 0.13314 0.01454 0.0181 0.0005 0.01404 343.5 236.53 126.9 13.03 115.6 3.18 115.6 3.18 906T011-33 0.05496 0.00562 0.14234 0.0141 0.01878 0.00049 0.01361 410.5 213.8 135.1 12.53 120 3.08 120 3.08 1106T011-34 0.04733 0.00216 0.11877 0.00527 0.0182 0.0002 0.00507 65.5 105.9 114 4.79 116.3 1.29 116.3 1.29 -206T011-35 0.04624 0.00239 0.11484 0.00578 0.01801 0.00022 0.00556 10.1 119.91 110.4 5.26 115.1 1.4 115.1 1.4 -406T011-36 0.04674 0.00237 0.11965 0.00589 0.01857 0.00023 0.00566 35.8 117.25 114.8 5.34 118.6 1.45 118.6 1.45 -306T011-37 0.04994 0.00375 0.12157 0.00885 0.01766 0.00032 0.00853 192.2 165.63 116.5 8.02 112.8 2.06 112.8 2.06 306T011-38 0.1265 0.02464 0.40593 0.07368 0.02327 0.00167 0.07201 2049.9 308.99 345.9 53.21 148.3 10.5 148.3 10.5 5706T011-39 0.05018 0.01029 0.12424 0.02474 0.01796 0.0009 0.02384 203.4 417.16 118.9 22.34 114.7 5.68 114.7 5.68 406T011-40 0.0485 0.00224 0.12674 0.00569 0.01895 0.00022 0.00547 123.7 105.39 121.2 5.13 121 1.37 121 1.37 006T011-41 0.05533 0.00544 0.13451 0.0128 0.01763 0.00044 0.01236 425.5 205.76 128.1 11.46 112.7 2.8 112.7 2.8 1206T011-42 0.11801 0.00379 0.38927 0.01174 0.02392 0.00027 0.01147 1926.3 56.36 333.8 8.58 152.4 1.7 152.4 1.7 5406T011-43 0.04226 0.0018 0.11042 0.00457 0.01895 0.00019 0.00438 0.1 0 106.3 4.18 121 1.2 121 1.2 -1406T011-44 0.06404 0.00277 0.16751 0.00697 0.01897 0.00023 0.00674 742.8 88.88 157.3 6.07 121.2 1.44 121.2 1.44 2306T011-45 0.04936 0.0016 0.1339 0.00422 0.01967 0.00017 0.00405 165.1 74.25 127.6 3.78 125.6 1.05 125.6 1.05 206T011-46 0.04336 0.00372 0.10862 0.00908 0.01817 0.00035 0.00873 0.1 52.52 104.7 8.32 116.1 2.2 116.1 2.2 -1106T011-47 0.04925 0.00346 0.13082 0.00892 0.01926 0.00033 0.00859 160 156.44 124.8 8.01 123 2.06 123 2.06 106T011-48 0.05181 0.00231 0.13584 0.00588 0.01901 0.00022 0.00566 277.1 99.03 129.3 5.26 121.4 1.37 121.4 1.37 606T011-49 0.10974 0.01525 0.43995 0.05744 0.02908 0.00141 0.05603 1795 233.55 370.2 40.51 184.8 8.84 184.8 8.84 5006T011-50 0.0898 0.00515 0.28789 0.0157 0.02325 0.00042 0.01528 1421.1 105.85 256.9 12.38 148.2 2.65 148.2 2.65 4206T011-51 0.08683 0.00402 0.23465 0.01034 0.0196 0.00029 0.01005 1356.7 86.64 214 8.5 125.1 1.81 125.1 1.81 4206T011-52 0.0483 0.0043 0.12086 0.01046 0.01815 0.00039 0.01007 113.9 197.71 115.9 9.48 116 2.48 116 2.48 006T011-53 0.0528 0.00455 0.13398 0.01119 0.01841 0.00039 0.0108 320 184.29 127.7 10.02 117.6 2.5 117.6 2.5 806T011-54 0.05615 0.00414 0.14549 0.01039 0.01879 0.00036 0.01003 458.1 156.17 137.9 9.21 120 2.26 120 2.26 1306T011-55 0.05194 0.00225 0.13321 0.00558 0.0186 0.00021 0.00537 282.7 95.86 127 5 118.8 1.31 118.8 1.31 606T011-56 0.05437 0.01683 0.1358 0.04078 0.01812 0.00137 0.03941 386.2 576.78 129.3 36.46 115.7 8.7 115.7 8.7 1106T011-57 0.04717 0.00119 0.12337 0.00301 0.01897 0.00013 0.00288 57.4 59.45 118.1 2.72 121.1 0.8 121.1 0.8 -306T011-58 0.0551 0.00208 0.13767 0.00503 0.01812 0.00018 0.00485 416.2 81.81 131 4.49 115.8 1.15 115.8 1.15 1206T011-59 0.04282 0.00124 0.10962 0.00308 0.01857 0.00013 0.00295 0.1 0 105.6 2.82 118.6 0.85 118.6 0.85 -1206T011-60 0.04551 0.00276 0.11248 0.00663 0.01792 0.00025 0.00638 0.1 112.22 108.2 6.05 114.5 1.61 114.5 1.61 -606T011-61 0.05087 0.00135 0.13238 0.0034 0.01887 0.00013 0.00327 235 60.07 126.2 3.05 120.5 0.85 120.5 0.85 5

n=49


• All uncertainties are reported at the 1! level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• U/Pb and 206Pb/207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

06T11

200

160

120

80

400.006

0.010

0.014

0.018

0.022

0.026

0.030

0.04 0.08 0.12 0.16 0.20

207Pb/235U

206 P

b/23

8 U


06T12 orthoquartziteIsotope ratios Age estimates (ma)Analysis_#

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! rho207Pb/206Pb 1!

207Pb/235U 1!206Pb/238U 1! age 1! % disc

06T012-01 0.07994 0.00406 1.72758 0.11816 0.15674 0.01134 0.10682 1195.5 96.94 1018.9 43.99 938.6 63.18 938.6 63.18 806T012-02 0.08013 0.00354 1.87138 0.11979 0.16937 0.01218 0.10761 1200.3 84.56 1071 42.36 1008.6 67.17 1008.6 67.17 606T012-03 0.05983 0.00273 0.75385 0.04902 0.09139 0.00658 0.04244 597.3 96.05 570.5 28.38 563.7 38.86 563.7 38.86 106T012-04 0.05132 0.00332 0.2787 0.02195 0.03939 0.00287 0.01908 255.2 142.1 249.6 17.43 249 17.78 249 17.78 006T012-05 0.11156 0.00516 4.90054 0.3202 0.31858 0.02298 0.29722 1825 81.65 1802.3 55.1 1782.8 112.35 1825 81.65 106T012-06 0.06148 0.00416 0.784 0.06353 0.09248 0.00677 0.05676 656.2 138.86 587.8 36.16 570.2 39.93 570.2 39.93 306T012-07 0.08016 0.00352 1.60924 0.10272 0.14559 0.01047 0.09225 1201 17.78 973.8 39.97 876.2 58.92 876.2 58.92 1006T012-08 0.05871 0.00274 0.75304 0.04943 0.09302 0.0067 0.04273 556.4 112.35 570 28.63 573.4 39.52 573.4 39.52 -106T012-09 0.04803 0.00243 0.10515 0.00718 0.01588 0.00115 0.00603 100.6 39.93 101.5 6.6 101.6 7.27 101.6 7.27 006T012-10 0.05459 0.00267 0.66912 0.04495 0.0889 0.00641 0.03854 395.4 58.92 520.2 27.34 549 37.95 549 37.95 -606T012-11 0.08038 0.00363 1.76327 0.11398 0.1591 0.01145 0.10253 1206.3 86.37 1032.1 41.88 951.8 63.7 951.8 63.7 806T012-12 0.08035 0.00356 1.71061 0.10959 0.1544 0.01111 0.09848 1205.7 84.7 1012.5 41.05 925.6 62.03 925.6 62.03 906T012-13 0.08044 0.00355 1.74353 0.11157 0.15721 0.01131 0.10026 1207.7 84.45 1024.8 41.29 941.2 63 941.2 63 806T012-14 0.09969 0.00454 2.99148 0.19405 0.21764 0.01568 0.17837 1618.2 82.45 1405.5 49.36 1269.4 83.01 1269.4 83.01 1006T012-15 0.04982 0.00598 0.11221 0.01415 0.01633 0.00125 0.0129 186.8 257.48 108 12.92 104.4 7.91 104.4 7.91 306T012-16 0.08073 0.00357 2.23508 0.14316 0.2008 0.01445 0.12871 1214.8 84.55 1192.1 44.93 1179.6 77.55 1179.6 77.55 106T012-17 0.06967 0.00319 1.39762 0.09094 0.1455 0.01048 0.08046 918.5 91.44 887.9 38.51 875.7 58.97 875.7 58.97 106T012-18 0.05852 0.00263 0.72493 0.04676 0.08984 0.00646 0.0403 549.4 95.2 553.6 27.53 554.6 38.24 554.6 38.24 006T012-19 0.08077 0.0037 2.25537 0.14675 0.20252 0.01459 0.13216 1215.8 87.46 1198.5 45.77 1188.8 78.2 1188.8 78.2 106T012-20 0.08057 0.00362 1.68943 0.10891 0.15208 0.01095 0.09796 1210.9 85.8 1004.5 41.12 912.6 61.25 912.6 61.25 906T012-21 0.05331 0.00292 0.30242 0.02159 0.04114 0.00298 0.01861 342.1 118.85 268.3 16.83 259.9 18.43 259.9 18.43 306T012-22 0.08021 0.00361 1.90033 0.1227 0.17183 0.01237 0.11033 1202.2 86.17 1081.2 42.96 1022.2 68.05 1022.2 68.05 506T012-23 0.28135 0.01288 24.57192 1.59573 0.63341 0.04584 1.54989 3370.5 69.65 3291.4 63.36 3163 180.92 3370.5 69.65 406T012-24 0.0557 0.00258 0.69055 0.04522 0.08992 0.00648 0.03874 440 99.72 533.1 27.16 555.1 38.3 555.1 38.3 -406T012-25 0.06033 0.00276 0.76569 0.04984 0.09204 0.00663 0.04321 615.5 95.99 577.3 28.66 567.6 39.12 567.6 39.12 206T012-26 0.06537 0.00318 1.1423 0.07654 0.12674 0.00914 0.0674 786.2 99.03 773.6 36.28 769.2 52.31 769.2 52.31 106T012-27 0.07371 0.0033 1.79448 0.1155 0.17658 0.01271 0.10279 533.1 87.82 1043.5 41.97 1048.3 69.62 1048.3 69.62 006T012-28 0.07409 0.00354 1.76493 0.11721 0.17277 0.01246 0.10475 577.3 93.59 1032.7 43.05 1027.3 68.5 1027.3 68.5 106T012-29 0.19147 0.00843 13.87925 0.88674 0.52574 0.03784 0.8489 773.6 70.52 2741.5 60.51 2723.5 159.86 773.6 70.52 106T012-30 0.06541 0.00314 1.16022 0.07716 0.12864 0.00928 0.06788 787.6 97.56 782.1 36.27 780.1 52.98 780.1 52.98 006T012-31 0.07151 0.00305 1.37203 0.08502 0.13918 0.01001 0.07501 972 84.4 877 36.39 840 56.64 840 56.64 406T012-32 0.05742 0.00249 0.73992 0.04622 0.09348 0.00673 0.03949 507.2 93.19 562.4 26.97 576.1 39.65 576.1 39.65 -206T012-33 0.06095 0.00267 0.77911 0.04889 0.09273 0.00667 0.04222 637.5 91.71 585 27.9 571.6 39.37 571.6 39.37 206T012-34 0.05118 0.00224 0.26766 0.01679 0.03794 0.00273 0.01406 249.1 97.86 240.8 13.45 240 16.95 240 16.95 006T012-35 0.04709 0.00684 0.09677 0.01441 0.01491 0.00117 0.01324 53.4 314.69 93.8 13.34 95.4 7.42 95.4 7.42 -206T012-36 0.05969 0.00262 0.78724 0.0494 0.09567 0.00688 0.04252 592.9 91.84 589.6 28.07 589 40.51 589 40.51 006T012-37 0.08089 0.00371 2.3193 0.1486 0.20799 0.015 0.1336 1218.8 87.6 1218.2 45.46 1218.1 80.04 1218.1 80.04 006T012-38 0.05636 0.00247 0.72321 0.04535 0.09309 0.0067 0.03865 465.6 94.97 552.6 26.72 573.8 39.5 573.8 39.5 -406T012-39 0.06085 0.00265 0.79546 0.04979 0.09483 0.00682 0.04297 634 91.24 594.3 28.16 584 40.17 584 40.17 206T012-40 0.05729 0.00267 0.70781 0.04571 0.08962 0.00646 0.03925 502.3 99.89 543.4 27.17 553.3 38.21 553.3 38.21 -206T012-41 0.05823 0.00263 0.74283 0.04728 0.09254 0.00666 0.04062 537.9 96.58 564.1 27.55 570.5 39.32 570.5 39.32 -106T012-42 0.14053 0.00601 7.74782 0.48035 0.39995 0.02877 0.45158 2233.7 72.14 2202.2 55.76 2168.8 132.5 2233.7 72.14 206T012-43 0.05325 0.00268 0.41071 0.02759 0.05595 0.00404 0.02355 339.4 109.83 349.4 19.86 351 24.66 351 24.66 006T012-44 0.07391 0.00321 1.73848 0.10856 0.17064 0.01228 0.09628 1038.9 85.26 1022.9 40.25 1015.6 67.62 1015.6 67.62 106T012-45 0.06751 0.00441 0.86516 0.06773 0.09297 0.00681 0.06092 853.4 130.28 632.9 36.87 573.1 40.15 573.1 40.15 906T012-46 0.08024 0.00345 2.10613 0.13095 0.19041 0.0137 0.11725 1202.9 82.34 1150.8 42.81 1123.6 74.18 1123.6 74.18 206T012-47 0.0488 0.00238 0.14348 0.00949 0.02133 0.00154 0.00795 138.2 110.88 136.1 8.43 136.1 9.71 136.1 9.71 006T012-48 0.07429 0.0032 1.7572 0.10933 0.17159 0.01234 0.09699 1049.3 84.61 1029.8 40.26 1020.9 67.92 1020.9 67.92 106T012-49 0.05413 0.00388 0.68002 0.05679 0.09112 0.00668 0.05011 376.5 153.44 526.8 34.32 562.2 39.48 562.2 39.48 -706T012-50 0.06233 0.00283 0.80059 0.05102 0.09317 0.00671 0.04431 685.5 93.98 597.2 28.77 574.3 39.58 574.3 39.58 406T012-51 0.05153 0.0031 0.27969 0.02083 0.03937 0.00286 0.01797 264.6 132.61 250.4 16.53 248.9 17.74 248.9 17.74 106T012-52 0.05469 0.00263 0.68799 0.04512 0.09125 0.00658 0.03854 400.1 103.24 531.6 27.14 562.9 38.88 562.9 38.88 -606T012-53 0.05812 0.00304 0.75447 0.05176 0.09417 0.00681 0.04495 533.7 111.17 570.8 29.96 580.2 40.13 580.2 40.13 -206T012-54 0.05172 0.00423 0.28849 0.0265 0.04047 0.00299 0.02351 272.9 176.98 257.4 20.88 255.7 18.51 255.7 18.51 106T012-55 0.0476 0.00232 0.09034 0.00596 0.01377 0.00099 0.00497 78.5 112.42 87.8 5.55 88.1 6.31 88.1 6.31 006T012-56 0.05937 0.00263 0.73434 0.0463 0.08973 0.00646 0.03984 580.6 93.47 559.1 27.11 553.9 38.21 553.9 38.21 106T012-57 0.1105 0.00469 4.63019 0.28629 0.30395 0.02186 0.26443 1807.7 75.25 1754.7 51.63 1710.9 108.06 1807.7 75.25 206T012-58 0.06382 0.00285 1.10951 0.07014 0.1261 0.00908 0.06106 735.8 91.67 757.9 33.76 765.6 51.98 765.6 51.98 -106T012-59 0.05669 0.00323 0.69863 0.05032 0.08939 0.00649 0.04383 478.9 121.99 538 30.08 552 38.38 552 38.38 -306T012-60 0.05546 0.00294 0.67781 0.04679 0.08866 0.00641 0.04038 430.4 114.11 525.4 28.32 547.6 37.98 547.6 37.98 -4

n=57




06T12

2200

1800

1400

1000

600

0.0

0.1

0.2

0.3

0.4

0.5

0 2 4 6 8 10

207Pb/235U

206 P

b/23

8 U


06T13 orthoquartziteAge estimates (ma)

Analysis_# 207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! rho 207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % disc06T013-01 0.06274 0.00234 0.91443 0.04797 0.10573 0.00619 0.04178 699.5 77.35 659.4 25.44 647.9 36.11 647.9 36.11 206T013-02 0.06197 0.00225 0.90239 0.04681 0.10563 0.00618 0.04063 673.1 75.89 653 24.99 647.3 36.05 647.3 36.05 106T013-03 0.06855 0.00247 1.3516 0.06987 0.14304 0.00837 0.0615 885.2 72.85 868.2 30.17 861.8 47.22 861.8 47.22 106T013-04 0.06969 0.00254 1.4159 0.07357 0.14739 0.00863 0.06494 919.1 73.28 895.6 30.92 886.3 48.49 886.3 48.49 106T013-05 0.1105 0.00409 2.18978 0.11441 0.14376 0.00843 0.10598 1807.7 65.75 1177.8 36.42 865.9 47.5 865.9 47.5 2606T013-06 0.19428 0.00708 14.36192 0.74504 0.53626 0.03147 0.71357 2778.8 58.48 2773.9 49.25 2767.8 132.04 2778.8 58.48 006T013-07 0.07429 0.0027 1.85177 0.09608 0.18082 0.01059 0.08549 1049.4 71.63 1064.1 34.21 1071.5 57.8 1049.4 71.63 -106T013-08 0.08351 0.00369 2.55212 0.14623 0.22171 0.01309 0.13314 1280.9 84.02 1287 41.8 1290.9 69.07 1280.9 84.02 006T013-09 0.07722 0.00406 1.92519 0.12218 0.18085 0.01079 0.11139 1127 101.27 1089.9 42.41 1071.6 58.89 1127 101.27 206T013-10 0.05978 0.00246 0.86947 0.04793 0.10552 0.0062 0.04173 595 87.15 635.3 26.03 646.7 36.15 646.7 36.15 -206T013-11 0.06157 0.00226 0.87863 0.04579 0.10353 0.00606 0.03973 659.1 76.8 640.2 24.75 635.1 35.41 635.1 35.41 106T013-12 0.07416 0.00281 1.86327 0.09852 0.18227 0.01069 0.08783 1045.8 74.55 1068.1 34.94 1079.3 58.27 1045.8 74.55 -106T013-13 0.08146 0.00338 2.31575 0.12807 0.20622 0.01214 0.11593 1232.6 79.16 1217.1 39.22 1208.7 64.9 1232.6 79.16 106T013-14 0.06827 0.00261 1.33014 0.0706 0.14135 0.00829 0.06231 876.7 77.07 858.9 30.77 852.3 46.81 852.3 46.81 106T013-15 0.06761 0.00305 1.36029 0.07882 0.14595 0.00861 0.07021 856.7 90.94 872 33.91 878.2 48.46 878.2 48.46 -106T013-16 0.0637 0.00235 1.01928 0.05321 0.11607 0.0068 0.04641 731.8 76.19 713.5 26.76 707.9 39.26 707.9 39.26 106T013-17 0.06665 0.00252 1.28599 0.068 0.13997 0.0082 0.0598 826.8 77.07 839.5 30.21 844.5 46.4 844.5 46.4 -106T013-18 0.05796 0.00229 0.64995 0.03508 0.08134 0.00477 0.03031 528.1 84.52 508.5 21.59 504.1 28.44 504.1 28.44 106T013-19 0.06639 0.00243 1.32644 0.06901 0.14495 0.00849 0.06052 818.6 74.62 857.3 30.12 872.6 47.78 872.6 47.78 -206T013-20 0.23629 0.00834 19.33947 0.98973 0.59375 0.03474 0.95499 3095.1 55.18 3058.9 49.41 3004.6 140.52 3095.1 55.18 206T013-21 0.07128 0.00283 1.4187 0.07671 0.14439 0.00848 0.06823 965.4 78.89 896.8 32.2 869.5 47.76 869.5 47.76 306T013-22 0.07398 0.00324 1.78276 0.1015 0.17481 0.01031 0.09119 1041 85.84 1039.2 37.04 1038.6 56.58 1041 85.84 006T013-23 0.0762 0.00313 1.87575 0.10333 0.17858 0.01051 0.09282 1100.3 80.14 1072.6 36.48 1059.2 57.47 1100.3 80.14 106T013-24 0.07549 0.00282 1.83434 0.0963 0.17628 0.01033 0.08597 1081.6 73.08 1057.8 34.5 1046.6 56.61 1081.6 73.08 106T013-25 0.18657 0.00682 13.43763 0.69828 0.52249 0.03067 0.66761 2712.2 59.06 2710.9 49.11 2709.7 129.84 2712.2 59.06 006T013-26 0.06896 0.00275 1.40522 0.07616 0.14782 0.00868 0.06748 897.6 80.06 891.1 32.15 888.7 48.75 888.7 48.75 006T013-27 0.30449 0.01091 29.77869 1.53358 0.70947 0.04161 1.49197 3493.2 54.32 3479.5 50.59 3456.5 156.9 3493.2 54.32 106T013-28 0.19656 0.00692 13.55102 0.69271 0.50013 0.02925 0.66346 2797.8 56.44 2718.9 48.34 2614.4 125.71 2797.8 56.44 406T013-29 0.06747 0.00253 1.33835 0.07048 0.1439 0.00843 0.06205 852.3 76.13 862.5 30.61 866.7 47.52 866.7 47.52 006T013-30 0.08212 0.00291 2.33177 0.11949 0.20599 0.01205 0.10744 1248.4 67.66 1222 36.42 1207.4 64.41 1248.4 67.66 106T013-31 0.07907 0.00277 2.01139 0.09783 0.18453 0.01037 0.08746 1173.8 67.91 1119.4 32.99 1091.7 56.44 1173.8 67.91 206T013-32 0.08007 0.00288 2.13966 0.10532 0.19384 0.01091 0.09441 1198.7 69.32 1161.7 34.06 1142.2 58.88 1198.7 69.32 206T013-33 0.15888 0.0055 10.30455 0.49808 0.47047 0.02643 0.47165 2443.8 57.48 2462.5 44.74 2485.6 115.88 2443.8 57.48 -106T013-34 0.07971 0.00281 1.81077 0.08826 0.16478 0.00926 0.079 1189.9 68.05 1049.4 31.88 983.3 51.26 983.3 51.26 606T013-35 0.07995 0.00281 1.69532 0.08245 0.15381 0.00864 0.07381 1195.9 67.7 1006.8 31.06 922.3 48.3 922.3 48.3 806T013-36 0.05939 0.00207 0.7489 0.03633 0.09147 0.00514 0.03119 581.5 74.02 567.6 21.09 564.2 30.35 564.2 30.35 106T013-37 0.05701 0.00243 0.63102 0.03406 0.0803 0.00454 0.02952 491.1 91.82 496.7 21.2 497.9 27.09 497.9 27.09 006T013-38 0.05973 0.00213 0.81565 0.03997 0.09905 0.00557 0.0344 593.9 75.36 605.6 22.35 608.8 32.66 608.8 32.66 -106T013-39 0.06211 0.00235 0.90499 0.04577 0.1057 0.00595 0.03982 677.8 78.99 654.4 24.4 647.7 34.71 647.7 34.71 106T013-40 0.16555 0.00586 7.63054 0.37247 0.33433 0.01882 0.35365 2513.2 58.31 2188.5 43.82 1859.4 90.9 2513.2 58.31 1506T013-41 0.08069 0.00292 1.99145 0.09826 0.17902 0.01007 0.08819 1214 69.34 1112.6 33.35 1061.6 55.08 1214 69.34 506T013-42 0.05678 0.00268 0.6445 0.03707 0.08234 0.00467 0.0324 482.3 101.72 505.1 22.89 510.1 27.84 510.1 27.84 -106T013-43 0.08101 0.00285 2.35119 0.11448 0.21054 0.01183 0.10265 1221.6 67.49 1227.9 34.69 1231.7 63.02 1221.6 67.49 006T013-44 0.08078 0.00285 2.29588 0.11188 0.20615 0.01159 0.10029 1216.2 67.61 1211 34.47 1208.3 61.94 1216.2 67.61 006T013-45 0.08046 0.00286 1.97705 0.0967 0.17823 0.01002 0.08668 1208.4 68.16 1107.7 32.98 1057.3 54.83 1208.4 68.16 506T013-46 0.07437 0.00259 1.81289 0.08785 0.17683 0.00994 0.07791 1051.5 68.63 1050.1 31.71 1049.6 54.42 1051.5 68.63 006T013-47 0.16256 0.00564 9.43324 0.45611 0.42094 0.02365 0.43246 2482.4 57.3 2381.1 44.39 2264.8 107.3 2482.4 57.3 506T013-48 0.06027 0.00234 0.6889 0.03529 0.08291 0.00467 0.03062 613.2 81.71 532.1 21.22 513.5 27.82 513.5 27.82 306T013-49 0.06283 0.00235 0.91955 0.04619 0.10616 0.00598 0.04021 702.5 77.68 662.1 24.43 650.4 34.84 650.4 34.84 206T013-50 0.08055 0.00281 1.9692 0.0955 0.17733 0.00996 0.08554 1210.5 66.98 1105 32.66 1052.4 54.56 1210.5 66.98 506T013-51 0.15427 0.0058 1.82759 0.09175 0.08593 0.00485 0.0869 2393.8 62.62 1055.4 32.95 531.4 28.82 531.4 28.82 5006T013-52 0.09813 0.00347 3.65734 0.17848 0.27034 0.0152 0.16328 1588.9 64.63 1562.1 38.91 1542.5 77.14 1588.9 64.63 106T013-53 0.05695 0.00248 0.6548 0.03587 0.0834 0.00472 0.03115 488.9 94.09 511.4 22.01 516.4 28.07 516.4 28.07 -106T013-54 0.07298 0.00258 1.52719 0.07449 0.1518 0.00853 0.06596 1013.4 69.93 941.4 29.93 911 47.76 911 47.76 306T013-55 0.081 0.00286 2.06302 0.10059 0.18476 0.01039 0.0902 1221.3 67.67 1136.6 33.34 1092.9 56.51 1221.3 67.67 406T013-56 0.07025 0.00268 1.48181 0.07517 0.15301 0.00862 0.06655 935.7 76.31 923 30.75 917.8 48.22 917.8 48.22 106T013-57 0.05747 0.00208 0.63591 0.0314 0.08026 0.00451 0.02689 509.3 78 499.8 19.49 497.7 26.94 497.7 26.94 006T013-58 0.08954 0.00324 2.96417 0.14644 0.24012 0.01352 0.13292 1415.7 67.71 1398.5 37.51 1387.3 70.26 1415.7 67.71 106T013-59 0.05929 0.00216 0.66356 0.03286 0.08118 0.00457 0.02829 577.8 77.14 516.8 20.06 503.2 27.23 503.2 27.23 306T013-60 0.05721 0.00209 0.70991 0.03523 0.09001 0.00506 0.03017 499.2 79.02 544.7 20.92 555.6 29.95 555.6 29.95 -206T013-61 0.05704 0.00205 0.63412 0.03118 0.08064 0.00453 0.02665 492.4 77.76 498.7 19.37 500 27.05 500 27.05 006T013-62 0.16577 0.00585 7.46639 0.36399 0.32671 0.01838 0.34561 2515.4 58.14 2169 43.65 1822.4 89.32 2515.4 58.14 16

n=61


Isotope ratios


06T13

3000

2600

2200

1800

1400

1000

0.0

0.2

0.4

0.6

0.8

0 4 8 12 16 20 24

207Pb/235U

206 P

b/23

8 U


06T14 lithic sandstoneAge estimates (ma)


207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % disc06T014-01 0.07398 0.00316 1.52683 0.08988 0.14969 0.01031 0.07957 1041 83.83 941.2 36.12 899.2 57.8 899.2 57.8 406T014-02 0.1399 0.00581 6.13364 0.35626 0.31799 0.02188 0.33438 2226 70.16 1995 50.71 1779.9 107.01 2226 70.16 1106T014-03 0.07867 0.00348 1.93084 0.11575 0.17801 0.01228 0.10347 1163.9 85.34 1091.8 40.1 1056.1 67.18 1163.9 85.34 306T014-04 0.11548 0.00949 3.40364 0.30236 0.21377 0.01575 0.28661 1887.4 140.98 1505.2 69.72 1248.9 83.65 1887.4 140.98 1706T014-05 0.06011 0.00272 0.75577 0.04585 0.0912 0.00629 0.03956 607.5 95.02 571.6 26.52 562.6 37.16 562.6 37.16 206T014-06 0.31883 0.01396 5.71822 0.3392 0.13008 0.00901 0.33019 3564.2 65.79 1934.1 51.27 788.3 51.38 788.3 51.38 5906T014-07 0.05433 0.00837 0.20654 0.03204 0.02758 0.00215 0.02989 384.5 313.3 190.6 26.97 175.4 13.49 175.4 13.49 806T014-08 0.0772 0.00364 0.43798 0.02713 0.04115 0.00284 0.02429 1126.3 91.31 368.8 19.16 259.9 17.61 259.9 17.61 3006T014-09 0.07079 0.00301 1.51897 0.08929 0.15563 0.01072 0.07857 951.4 84.71 938.1 35.99 932.4 59.78 932.4 59.78 106T014-10 0.07463 0.00318 1.57018 0.09231 0.1526 0.01051 0.0818 1058.3 83.7 958.5 36.47 915.5 58.77 915.5 58.77 406T014-11 0.09552 0.004 3.43439 0.20037 0.26078 0.01795 0.18242 1538.4 76.83 1512.3 45.88 1493.8 91.78 1538.4 76.83 106T014-12 0.07293 0.00365 1.5482 0.09915 0.15396 0.01067 0.08848 1012.1 98.29 949.8 39.51 923.1 59.61 923.1 59.61 306T014-13 0.05298 0.00263 0.66008 0.04218 0.09037 0.00625 0.03593 327.7 108.84 514.7 25.8 557.7 36.94 557.7 36.94 -806T014-14 0.04736 0.00345 0.11487 0.00945 0.01759 0.00123 0.00822 66.8 165.41 110.4 8.61 112.4 7.82 112.4 7.82 -206T014-15 0.07432 0.00348 0.95377 0.05884 0.09308 0.00643 0.05241 1050.1 91.55 680.1 30.58 573.7 37.93 573.7 37.93 1606T014-16 0.06698 0.01081 0.17179 0.0277 0.0186 0.0015 0.0262 837 304.27 161 24 118.8 9.46 118.8 9.46 2606T014-17 0.07562 0.00343 1.88334 0.11435 0.18063 0.01247 0.10188 1085.1 88.41 1075.2 40.27 1070.4 68.08 1085.1 88.41 006T014-18 0.11523 0.00484 4.56331 0.2664 0.28724 0.01977 0.24663 1883.5 73.71 1742.6 48.62 1627.7 99.03 1883.5 73.71 706T014-19 0.11472 0.00482 3.08727 0.18028 0.19518 0.01344 0.16684 1875.6 73.84 1429.5 44.79 1149.4 72.47 1875.6 73.84 2006T014-20 0.05966 0.00287 0.75759 0.04746 0.09211 0.00636 0.0411 591.2 100.93 572.6 27.42 568 37.57 568 37.57 106T014-21 0.06252 0.00305 0.78715 0.04969 0.09132 0.00631 0.04338 691.9 100.64 589.6 28.23 563.3 37.3 563.3 37.3 406T014-22 0.1152 0.00491 3.5907 0.21116 0.22607 0.01558 0.19558 1883.1 74.86 1547.5 46.7 1313.8 81.89 1883.1 74.86 1506T014-23 0.0723 0.00384 0.17955 0.0119 0.01801 0.00125 0.01065 994.3 104.49 167.7 10.24 115.1 7.92 115.1 7.92 3106T014-24 0.13519 0.0057 7.29509 0.42668 0.3914 0.02696 0.39972 2166.4 71.66 2148.2 52.23 2129.3 124.89 2166.4 71.66 106T014-25 0.05264 0.00314 0.39913 0.02852 0.055 0.00383 0.02469 313.2 130 341 20.7 345.1 23.39 345.1 23.39 -106T014-26 0.08092 0.00348 2.20648 0.13029 0.19777 0.01362 0.11667 1219.5 82.1 1183.1 41.26 1163.3 73.33 1219.5 82.1 206T014-27 0.05125 0.00394 0.11302 0.00967 0.01599 0.00113 0.00854 252.3 167.64 108.7 8.82 102.3 7.16 102.3 7.16 606T014-28 0.05826 0.00349 0.72514 0.05188 0.09028 0.00629 0.04559 538.9 126.38 553.7 30.53 557.2 37.21 557.2 37.21 -106T014-29 0.06356 0.00287 0.79457 0.0481 0.09067 0.00625 0.04185 727.1 92.83 593.8 27.22 559.5 36.96 559.5 36.96 606T014-30 0.05893 0.00253 0.74265 0.04387 0.09141 0.00629 0.03758 564.4 90.93 563.9 25.56 563.9 37.18 563.9 37.18 006T014-31 0.06312 0.00383 0.82855 0.06253 0.09523 0.0071 0.05543 712.3 123.86 612.8 34.72 586.4 41.78 586.4 41.78 406T014-32 0.08023 0.00343 1.80304 0.11353 0.16303 0.01201 0.10152 1202.7 81.91 1046.6 41.12 973.6 66.55 973.6 66.55 706T014-33 0.0807 0.00342 2.13497 0.13391 0.19193 0.01413 0.11978 1214 81.11 1160.2 43.37 1131.8 76.43 1214 81.11 206T014-34 0.14015 0.00594 4.69395 0.29437 0.24296 0.0179 0.27647 2229.1 71.63 1766.2 52.49 1402.1 92.82 2229.1 71.63 2106T014-35 0.08061 0.00341 1.70562 0.10685 0.1535 0.0113 0.09555 1211.8 80.92 1010.6 40.1 920.6 63.16 920.6 63.16 906T014-36 0.13888 0.00598 5.48011 0.34576 0.28626 0.0211 0.32466 2213.3 72.78 1897.5 54.18 1622.8 105.77 2213.3 72.78 1406T014-37 0.14148 0.0059 8.13462 0.50675 0.4171 0.0307 0.47605 2245.4 70.34 2246.1 56.33 2247.3 139.64 2245.4 70.34 006T014-38 0.07521 0.0033 1.10964 0.07068 0.10703 0.00789 0.06279 1074.2 85.79 758 34.02 655.5 45.93 655.5 45.93 1406T014-39 0.082 0.00637 0.28484 0.02515 0.0252 0.00192 0.02323 1245.4 144.95 254.5 19.88 160.4 12.07 160.4 12.07 3706T014-40 0.05759 0.00347 0.2053 0.01544 0.02586 0.00192 0.01352 513.9 127.54 189.6 13.01 164.6 12.09 164.6 12.09 1306T014-41 0.0742 0.0037 0.96261 0.06512 0.09411 0.00697 0.05815 1047 97.5 684.6 33.69 579.8 41.05 579.8 41.05 1506T014-42 0.05716 0.00262 0.75875 0.04933 0.09629 0.0071 0.04223 497.3 97.94 573.3 28.48 592.6 41.76 592.6 41.76 -306T014-43 0.07426 0.00319 1.88171 0.11872 0.18382 0.01354 0.10518 1048.5 84.28 1074.7 41.83 1087.8 73.73 1048.5 84.28 -106T014-44 0.08075 0.00346 2.00064 0.12604 0.17973 0.01324 0.1128 1215.4 81.92 1115.7 42.65 1065.5 72.34 1215.4 81.92 406T014-45 0.2363 0.01065 4.9047 0.31456 0.15057 0.01115 0.30341 3095.2 70.08 1803.1 54.09 904.2 62.49 904.2 62.49 5006T014-46 0.07441 0.00313 1.36916 0.08556 0.13348 0.00982 0.07574 1052.7 82.41 875.8 36.67 807.7 55.88 807.7 55.88 806T014-47 0.06751 0.00329 0.85641 0.05727 0.09203 0.0068 0.05047 853.5 98.08 628.2 31.32 567.5 40.16 567.5 40.16 1006T014-48 0.10497 0.01435 0.35945 0.04956 0.02484 0.00212 0.04744 1713.9 232.27 311.8 37.02 158.2 13.34 158.2 13.34 4906T014-49 0.06629 0.00317 0.85192 0.05643 0.09323 0.00689 0.04954 815.6 96.81 625.7 30.94 574.6 40.61 574.6 40.61 806T014-50 0.07154 0.00301 1.51233 0.09461 0.15336 0.01129 0.08332 972.8 83.34 935.4 38.24 919.8 63.1 919.8 63.1 206T014-51 0.06429 0.00274 0.8252 0.05186 0.09311 0.00686 0.045 751.2 87.41 610.9 28.85 573.9 40.43 573.9 40.43 606T014-52 0.05989 0.00269 0.75052 0.04833 0.09091 0.0067 0.04163 599.7 94.5 568.5 28.03 560.9 39.6 560.9 39.6 106T014-53 0.23815 0.01682 0.91924 0.07371 0.028 0.00219 0.07152 3107.7 108.24 662 39 178 13.76 178 13.76 7306T014-54 0.05536 0.0028 0.37142 0.02532 0.04867 0.0036 0.02172 426.7 108.63 320.7 18.75 306.3 22.12 306.3 22.12 406T014-55 0.08038 0.00341 2.20679 0.13846 0.19917 0.01466 0.1238 1206.3 81.22 1183.2 43.84 1170.8 78.83 1206.3 81.22 106T014-56 0.04573 0.00317 0.17009 0.01402 0.02698 0.00201 0.01201 0.1 142.81 159.5 12.17 171.6 12.64 171.6 12.64 -806T014-57 0.06279 0.00335 0.80905 0.05676 0.09348 0.00693 0.04983 701.1 109.79 601.9 31.86 576.1 40.86 576.1 40.86 406T014-58 0.11429 0.00504 4.23077 0.26981 0.26854 0.01982 0.24999 1868.7 77.53 1680 52.37 1533.4 100.7 1868.7 77.53 906T014-59 0.0707 0.003 0.87769 0.05505 0.09006 0.00663 0.04842 948.8 84.41 639.7 29.77 555.9 39.21 555.9 39.21 1306T014-60 0.0634 0.00266 0.8338 0.05206 0.0954 0.00702 0.04504 721.8 86.55 615.7 28.83 587.4 41.32 587.4 41.32 5

n=52


Isotope ratios


06T14

2200

1800

1400

1000

600

2000.0

0.1

0.2

0.3

0.4

0.5

0.6

0 2 4 6 8 10

207Pb/235U

206 P

b/23

8 U


06T15 polymict lithic conglomerateAge estimates (ma)


207Pb/235U 1!206Pb/238U 1! rho

207Pb/206Pb 1!207Pb/235U 1!

206Pb/238U 1! age 1! % disc06T015-01 0.04749 0.00312 0.09927 0.0079 0.01516 0.0011 0.0068 73.1 149.71 96.1 7.3 97 6.99 97 6.99 -106T015-02 0.04649 0.00278 0.09523 0.00714 0.01486 0.00108 0.00606 22.9 137.89 92.4 6.62 95.1 6.85 95.1 6.85 -306T015-03 0.18711 0.00852 12.34934 0.79664 0.47875 0.03464 0.762 2716.9 73.18 2631.3 60.59 2521.8 151 2716.9 73.18 406T015-04 0.04653 0.00211 0.09726 0.00627 0.01516 0.00109 0.00518 25 105.19 94.2 5.8 97 6.94 97 6.94 -306T015-05 0.04944 0.00417 0.10558 0.00998 0.01549 0.00114 0.00884 168.7 185.66 101.9 9.17 99.1 7.27 99.1 7.27 306T015-06 0.04978 0.00226 0.10708 0.00691 0.0156 0.00112 0.00579 184.7 102.58 103.3 6.34 99.8 7.14 99.8 7.14 306T015-07 0.05849 0.0026 0.71399 0.04564 0.08855 0.00638 0.03926 548.1 94.35 547.1 27.04 546.9 37.78 546.9 37.78 006T015-08 0.04732 0.0025 0.09394 0.00655 0.0144 0.00104 0.00551 64.9 121.91 91.2 6.08 92.2 6.62 92.2 6.62 -106T015-09 0.04793 0.00408 0.12112 0.01158 0.01833 0.00135 0.01023 94.7 191.33 116.1 10.49 117.1 8.54 117.1 8.54 -106T015-10 0.07418 0.0033 1.86993 0.1195 0.18285 0.01318 0.10632 1046.4 87.41 1070.5 42.28 1082.5 71.81 1046.4 87.41 -106T015-11 0.07433 0.0035 1.86469 0.12243 0.18196 0.01314 0.10929 1050.5 92.21 1068.6 43.39 1077.7 71.67 1050.5 92.21 -106T015-12 0.054 0.00237 0.40959 0.026 0.05502 0.00396 0.02204 370.8 95.17 348.6 18.73 345.3 24.21 345.3 24.21 106T015-13 0.04654 0.00288 0.09033 0.0069 0.01408 0.00102 0.00588 25.7 142.04 87.8 6.43 90.1 6.5 90.1 6.5 -306T015-14 0.05026 0.00473 0.12807 0.01323 0.01848 0.00137 0.01186 206.8 204.83 122.4 11.91 118.1 8.67 118.1 8.67 406T015-15 0.05837 0.00259 0.72398 0.04618 0.08997 0.00648 0.0397 543.5 93.99 553 27.2 555.4 38.33 555.4 38.33 006T015-16 0.07462 0.00326 1.33573 0.08469 0.12984 0.00935 0.07534 1057.9 85.9 861.4 36.82 787 53.36 787 53.36 906T015-17 0.05192 0.00528 0.26462 0.02903 0.03697 0.00277 0.02626 281.8 216.87 238.4 23.31 234 17.24 234 17.24 206T015-18 0.04837 0.00774 0.10383 0.01694 0.01557 0.00124 0.0157 117.3 339.1 100.3 15.58 99.6 7.87 99.6 7.87 106T015-19 0.05044 0.0259 0.13151 0.06627 0.01891 0.00249 0.06378 215.5 888.7 125.5 59.47 120.8 15.76 120.8 15.76 406T015-20 0.04536 0.00354 0.11884 0.01063 0.019 0.00139 0.00924 0.1 143.08 114 9.65 121.3 8.82 121.3 8.82 -606T015-21 0.04868 0.00266 0.12818 0.00911 0.0191 0.00138 0.00773 132.2 123.8 122.5 8.2 122 8.75 122 8.75 006T015-22 0.04886 0.00236 0.10391 0.00691 0.01543 0.00111 0.0058 141 109.73 100.4 6.36 98.7 7.07 98.7 7.07 206T015-23 0.04467 0.00475 0.11435 0.01303 0.01857 0.00139 0.01164 0.1 167.77 109.9 11.88 118.6 8.83 118.6 8.83 -806T015-24 0.07331 0.00338 1.82561 0.11859 0.18064 0.01303 0.10556 1022.4 90.59 1054.7 42.62 1070.5 71.16 1022.4 90.59 -106T015-25 0.04966 0.00245 0.25509 0.01713 0.03726 0.00269 0.01444 179.3 110.93 230.7 13.86 235.8 16.72 235.8 16.72 -206T015-26 0.0757 0.00372 0.15356 0.01029 0.01471 0.00106 0.00923 1087.2 95.57 145.1 9.06 94.2 6.76 94.2 6.76 3506T015-27 0.0444 0.0029 0.09004 0.00712 0.01471 0.00107 0.00605 0.1 63.68 87.5 6.64 94.1 6.8 94.1 6.8 -806T015-28 0.0525 0.00265 0.28183 0.01917 0.03894 0.00281 0.01636 307.3 110.97 252.1 15.18 246.3 17.46 246.3 17.46 206T015-29 0.04771 0.00305 0.1022 0.00798 0.01554 0.00113 0.00685 83.9 145.95 98.8 7.35 99.4 7.18 99.4 7.18 -106T015-30 0.04809 0.00274 0.15588 0.01134 0.02351 0.0017 0.00964 103.7 129.52 147.1 9.96 149.8 10.73 149.8 10.73 -206T015-31 0.06269 0.0048 0.16399 0.01447 0.01897 0.00141 0.01306 697.6 155.37 154.2 12.63 121.2 8.93 121.2 8.93 2106T015-32 0.07611 0.00397 1.91356 0.13275 0.18233 0.01335 0.1194 1098 100.92 1085.8 46.26 1079.7 72.81 1098 100.92 106T015-33 0.04705 0.0025 0.09177 0.00645 0.01415 0.00103 0.00542 51.2 122.63 89.1 6 90.6 6.57 90.6 6.57 -206T015-34 0.07522 0.00339 1.52298 0.0984 0.14682 0.01069 0.08771 1074.5 87.92 939.7 39.6 883.1 60.09 883.1 60.09 606T015-35 0.0527 0.00269 0.13282 0.00912 0.01828 0.00133 0.00779 315.7 111.8 126.6 8.18 116.8 8.45 116.8 8.45 806T015-36 0.06917 0.00488 0.18067 0.01503 0.01894 0.00141 0.01362 903.8 139.14 168.6 12.92 121 8.9 121 8.9 2806T015-37 0.04643 0.0025 0.06387 0.00452 0.00998 0.00073 0.00379 19.8 124.57 62.9 4.31 64 4.65 64 4.65 -206T015-38 0.07569 0.00357 1.66255 0.10978 0.1593 0.01162 0.09816 1086.8 91.84 994.3 41.86 952.9 64.6 952.9 64.6 406T015-39 0.05041 0.00275 0.10131 0.00721 0.01457 0.00107 0.00614 214 121.45 98 6.65 93.3 6.77 93.3 6.77 506T015-40 0.07593 0.0037 1.85871 0.12465 0.17753 0.01296 0.11169 1093.2 94.67 1066.5 44.28 1053.5 70.98 1093.2 94.67 106T015-41 0.0468 0.0054 0.07581 0.00925 0.01175 0.0009 0.00835 38.9 255.12 74.2 8.73 75.3 5.73 75.3 5.73 -106T015-42 0.0658 0.004 0.15308 0.01159 0.01687 0.00124 0.01035 799.9 122.52 144.6 10.2 107.9 7.87 107.9 7.87 2506T015-43 0.11138 0.00485 4.95332 0.3151 0.32252 0.02346 0.29164 1822 76.93 1811.4 53.74 1802 114.37 1822 76.93 106T015-44 0.06739 0.0034 0.13432 0.00916 0.01445 0.00106 0.0081 850 101.39 128 8.2 92.5 6.71 92.5 6.71 2806T015-45 0.04751 0.00273 0.09641 0.00708 0.01472 0.00108 0.006 74.2 131.91 93.5 6.55 94.2 6.85 94.2 6.85 -106T015-46 0.05882 0.00263 0.72813 0.04689 0.08978 0.00653 0.04036 560.3 94.58 555.5 27.55 554.2 38.64 554.2 38.64 006T015-47 0.04147 0.00361 0.08391 0.00818 0.01467 0.00109 0.00709 0.1 0 81.8 7.66 93.9 6.94 93.9 6.94 -1506T015-48 0.0466 0.00304 0.11575 0.00919 0.01802 0.00132 0.00787 28.4 149.7 111.2 8.36 115.1 8.39 115.1 8.39 -406T015-49 0.10687 0.01754 0.2771 0.04504 0.0188 0.00169 0.04335 1746.6 273.71 248.4 35.81 120.1 10.67 120.1 10.67 5206T015-50 0.04808 0.00308 0.1259 0.00987 0.01899 0.0014 0.00847 103.2 144.85 120.4 8.9 121.3 8.83 121.3 8.83 -106T015-51 0.07586 0.0035 1.90166 0.12418 0.18179 0.01325 0.11093 1091.5 89.7 1081.7 43.46 1076.7 72.26 1091.5 89.7 006T015-52 0.05116 0.01054 0.13174 0.02717 0.01868 0.00161 0.02556 247.9 415.86 125.7 24.38 119.3 10.19 119.3 10.19 506T015-53 0.05359 0.00281 0.65697 0.0458 0.08891 0.0065 0.0393 353.6 113.66 512.8 28.06 549.1 38.47 549.1 38.47 -706T015-54 0.0758 0.00361 1.79604 0.11902 0.17184 0.01254 0.10648 1089.8 92.49 1044 43.22 1022.2 68.97 1089.8 92.49 206T015-55 0.04729 0.00468 0.12206 0.01311 0.01872 0.00141 0.0117 63.2 220.57 116.9 11.86 119.6 8.94 119.6 8.94 -206T015-56 0.04356 0.00313 0.11363 0.00962 0.01892 0.0014 0.00822 0.1 32.89 109.3 8.77 120.8 8.83 120.8 8.83 -1106T015-57 0.09263 0.00408 3.14788 0.20139 0.24645 0.01794 0.18345 1480.2 81.45 1444.5 49.3 1420.1 92.76 1480.2 81.45 206T015-58 0.05048 0.0044 0.1251 0.01217 0.01797 0.00134 0.01083 217.3 190.27 119.7 10.98 114.8 8.51 114.8 8.51 406T015-59 0.21332 0.00918 16.79439 1.0632 0.57095 0.04153 1.02167 2930.9 67.93 2923.2 60.67 2911.7 170.41 2930.9 67.93 0

n=51


Isotope ratios


06T15

2600

2200

1800

1400

1000

0.0

0.2

0.4

0.6

0 4 8 12 16

207Pb/235U

206 P

b/23

8 U


06T15

650

550

450

350

250

150

50

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.0 0.2 0.4 0.6 0.8 1.0

207Pb/235U

206 P

b/23

8 U


06T16 volcaniclastic sandstoneAge estimates (ma)


207Pb/206Pb 1! 207Pb/235U1! 206Pb/238U1! age 1! % disc06T016-01 0.06238 0.00366 0.16166 0.01178 0.0188 0.00138 0.0104 687.3 120.59 152.2 10.29 120.1 8.71 120.1 8.71 2106T016-02 0.06469 0.00376 0.16701 0.01208 0.01873 0.00137 0.01071 764.2 117.91 156.8 10.51 119.6 8.67 119.6 8.67 2406T016-03 0.04731 0.00213 0.14754 0.00932 0.02262 0.00164 0.00768 64.4 104.49 139.7 8.25 144.2 10.34 144.2 10.34 -306T016-04 0.19158 0.00967 0.60473 0.03998 0.0229 0.00168 0.0383 2755.8 80.62 480.2 25.29 145.9 10.6 145.9 10.6 7006T016-05 0.13789 0.0076 0.49268 0.03423 0.02592 0.00191 0.03232 2200.8 92.68 406.7 23.28 165 12 165 12 5906T016-06 0.05006 0.00277 0.13227 0.00932 0.01917 0.0014 0.00792 197.6 123.66 126.1 8.36 122.4 8.84 122.4 8.84 306T016-07 0.05299 0.0045 0.13893 0.01308 0.01902 0.00142 0.01166 328.5 181.59 132.1 11.66 121.4 8.97 121.4 8.97 806T016-08 0.10659 0.00537 0.32582 0.02165 0.02218 0.00162 0.02003 1741.8 89.48 286.4 16.58 141.4 10.21 141.4 10.21 5106T016-09 0.05072 0.00266 0.18375 0.01255 0.02628 0.00191 0.01064 228.3 116.73 171.3 10.77 167.2 12.01 167.2 12.01 206T016-10 0.05635 0.00367 0.14842 0.01156 0.01911 0.0014 0.01016 465.4 139.01 140.5 10.23 122 8.88 122 8.88 1306T016-11 0.04662 0.00249 0.12477 0.00862 0.01941 0.00141 0.00721 29.8 123.5 119.4 7.78 124 8.93 124 8.93 -406T016-12 0.04733 0.00342 0.12505 0.01046 0.01917 0.00141 0.00905 65.6 163.97 119.6 9.44 122.4 8.93 122.4 8.93 -206T016-13 0.04649 0.00281 0.12302 0.00915 0.01919 0.0014 0.00775 23.2 139.15 117.8 8.27 122.6 8.87 122.6 8.87 -406T016-14 0.05255 0.00447 0.13602 0.01285 0.01878 0.0014 0.01145 309.4 182.44 129.5 11.48 119.9 8.85 119.9 8.85 706T016-15 0.13193 0.00921 0.40696 0.03262 0.02238 0.00169 0.03093 2123.8 117.43 346.7 23.54 142.7 10.63 142.7 10.63 5906T016-16 0.07203 0.00841 0.18619 0.02257 0.01875 0.00147 0.0211 987.1 220.66 173.4 19.32 119.8 9.32 119.8 9.32 3106T016-17 0.08717 0.00944 0.227 0.02566 0.01889 0.00148 0.02418 1364.2 195.32 207.7 21.23 120.6 9.39 120.6 9.39 4206T016-18 0.11575 0.0064 0.35108 0.02451 0.022 0.00162 0.02289 1891.5 96.25 305.5 18.42 140.3 10.2 140.3 10.2 5406T016-19 0.04636 0.0025 0.12168 0.00845 0.01904 0.00139 0.00706 16.3 124.65 116.6 7.65 121.6 8.77 121.6 8.77 -406T016-20 0.06651 0.0031 0.23565 0.01512 0.0257 0.00187 0.01325 822.5 94.48 214.9 12.42 163.6 11.73 163.6 11.73 2406T016-21 0.07433 0.00701 0.19535 0.01982 0.01906 0.00145 0.01837 1050.5 179.11 181.2 16.84 121.7 9.2 121.7 9.2 3306T016-22 0.11075 0.00468 4.91176 0.30082 0.32173 0.02331 0.27751 1811.7 74.82 1804.3 51.67 1798 113.7 1812 74.82 006T016-23 0.04805 0.00389 0.12705 0.01156 0.01918 0.00142 0.01014 101.8 181 121.4 10.41 122.5 8.99 122.5 8.99 -106T016-24 0.08301 0.00613 0.21855 0.01842 0.0191 0.00143 0.01699 1269.5 137.59 200.7 15.34 122 9.01 122 9.01 3906T016-25 0.10965 0.00691 0.2875 0.02168 0.01902 0.00141 0.02027 1793.5 110.52 256.6 17.1 121.5 8.92 121.5 8.92 5306T016-26 0.04649 0.00404 0.1233 0.01184 0.01924 0.00143 0.01041 22.8 196.24 118.1 10.7 122.9 9.06 122.9 9.06 -406T016-27 0.05962 0.00633 0.15695 0.01765 0.0191 0.00146 0.01619 589.7 214.86 148 15.49 122 9.23 122 9.23 1806T016-28 0.07725 0.0051 0.19859 0.01553 0.01865 0.00138 0.01415 1127.6 126.25 183.9 13.16 119.1 8.72 119.1 8.72 3506T016-29 0.05307 0.00316 0.13709 0.01009 0.01874 0.00137 0.00872 331.8 128.84 130.4 9.01 119.7 8.66 119.7 8.66 806T016-30 0.06565 0.00417 0.17383 0.01328 0.01921 0.00141 0.01187 795.2 127.76 162.7 11.49 122.7 8.93 122.7 8.93 2506T016-31 0.06627 0.00306 0.23292 0.01516 0.02549 0.0019 0.01326 815 93.74 212.6 12.49 162.3 11.97 162.3 11.97 2406T016-32 0.05199 0.00265 0.18111 0.01239 0.02527 0.00189 0.0105 284.8 112.5 169 10.65 160.9 11.89 160.9 11.89 506T016-33 0.04848 0.00231 0.16812 0.01112 0.02515 0.00188 0.00924 123 108.55 157.8 9.66 160.1 11.81 160.1 11.81 -106T016-34 0.06903 0.00837 0.17903 0.02256 0.01881 0.00152 0.02104 899.5 231.81 167.2 19.43 120.1 9.6 120.1 9.6 2806T016-35 0.04739 0.00235 0.12209 0.00824 0.01869 0.0014 0.00684 68.2 114.53 117 7.46 119.4 8.84 119.4 8.84 -206T016-36 0.22788 0.01076 0.79369 0.05172 0.02526 0.0019 0.04982 3037.2 73.69 593.3 29.28 160.8 11.95 160.8 11.95 7306T016-37 0.04741 0.0077 0.12111 0.02005 0.01853 0.00152 0.01853 69.1 347.48 116.1 18.16 118.4 9.61 118.4 9.61 -206T016-38 0.08612 0.00505 0.22524 0.01658 0.01897 0.00143 0.01515 1340.9 109.14 206.3 13.74 121.1 9.06 121.1 9.06 4106T016-39 0.07416 0.00564 0.2556 0.02227 0.025 0.00192 0.02035 1045.8 146.25 231.1 18.01 159.2 12.06 159.2 12.06 3106T016-40 0.06498 0.00311 1.13926 0.07545 0.12716 0.00951 0.06594 773.8 97.63 772.2 35.81 771.6 54.38 771.6 54.38 006T016-41 0.07082 0.00472 0.18613 0.01485 0.01906 0.00145 0.0134 952.2 130.72 173.3 12.71 121.7 9.15 121.7 9.15 3006T016-42 0.15199 0.01457 0.46116 0.04653 0.02201 0.0018 0.04473 2368.4 154.92 385.1 32.33 140.3 11.38 140.3 11.38 6406T016-43 0.07514 0.00674 0.19676 0.01937 0.01899 0.00148 0.01789 1072.2 170.41 182.4 16.44 121.3 9.34 121.3 9.34 3306T016-44 0.05116 0.00458 0.13142 0.01301 0.01863 0.00143 0.01158 248.1 193.58 125.4 11.67 119 9.06 119 9.06 506T016-45 0.05177 0.00247 0.17672 0.01169 0.02476 0.00185 0.00984 275.1 105.52 165.2 10.08 157.7 11.63 157.7 11.63 506T016-46 0.04836 0.00323 0.1261 0.01012 0.01891 0.00143 0.00869 116.9 150.27 120.6 9.13 120.8 9.03 120.8 9.03 006T016-47 0.06634 0.00586 0.2334 0.02273 0.02552 0.00198 0.02075 817.2 174.39 213 18.72 162.4 12.43 162.4 12.43 2406T016-48 0.44442 0.01891 2.80969 0.17538 0.04585 0.00343 0.17195 4066.6 61.93 1358.1 46.74 289 21.14 289 21.14 7906T016-49 0.28507 0.03159 1.33987 0.14535 0.03409 0.00311 0.14224 3390.9 162.77 863.2 63.08 216.1 19.37 216.1 19.37 7506T016-50 0.07279 0.00759 0.19374 0.02148 0.01931 0.00153 0.01995 1008 198.24 179.8 18.27 123.3 9.68 123.3 9.68 3106T016-51 0.04536 0.00352 0.11866 0.01059 0.01898 0.00144 0.00915 0.1 142.06 113.9 9.61 121.2 9.11 121.2 9.11 -606T016-52 0.06746 0.00343 0.23581 0.01608 0.02535 0.0019 0.01418 851.9 102.18 215 13.21 161.4 11.94 161.4 11.94 2506T016-53 0.05502 0.00328 0.14533 0.01085 0.01916 0.00144 0.00941 413 127.36 137.8 9.62 122.3 9.11 122.3 9.11 1106T016-54 0.05759 0.00396 0.1506 0.0123 0.01897 0.00144 0.01086 513.8 144.53 142.4 10.85 121.1 9.09 121.1 9.09 1506T016-55 0.05229 0.00372 0.13626 0.0114 0.0189 0.00143 0.00997 298.2 154.29 129.7 10.19 120.7 9.06 120.7 9.06 706T016-56 0.05162 0.00293 0.13662 0.00992 0.0192 0.00144 0.00848 268.6 125.29 130 8.86 122.6 9.11 122.6 9.11 606T016-57 0.08533 0.00454 0.22198 0.01548 0.01887 0.00142 0.01406 1322.9 99.75 203.6 12.86 120.5 8.97 120.5 8.97 4106T016-58 0.0706 0.004 0.18913 0.01368 0.01943 0.00146 0.01222 945.7 111.7 175.9 11.68 124.1 9.25 124.1 9.25 2906T016-59 0.05624 0.00328 0.19549 0.01441 0.02521 0.0019 0.01251 461.3 125.09 181.3 12.24 160.5 11.92 160.5 11.92 1106T016-60 0.1469 0.00835 0.45695 0.03275 0.02256 0.00171 0.03104 2310.2 94.43 382.1 22.82 143.8 10.81 143.8 10.81 62

n=38


Isotope ratios


06T16

1800

1400

1000

600

200

0.0

0.1

0.2

0.3

0.4

0 2 4 6

207Pb/235U

206 P

b/23

8 U


06T16

220

200

180

160

140

120

100

800.012

0.016

0.020

0.024

0.028

0.032

0.036

0.08 0.12 0.16 0.20 0.24

207Pb/235U

206 P

b/23

8 U


06T17 volcaniclastic sandstoneAge estimates (ma)


207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % disc06T017-01 0.07012 0.00584 0.18797 0.01754 0.01944 0.00144 0.0161 931.9 162.27 174.9 14.99 124.1 9.13 124.1 9.13 2906T017-02 0.05883 0.0045 0.15659 0.01376 0.01931 0.00142 0.01234 560.8 158.62 147.7 12.08 123.3 8.97 123.3 8.97 1706T017-03 0.05382 0.00318 0.14822 0.011 0.01998 0.00145 0.00955 363.5 127.36 140.3 9.72 127.5 9.14 127.5 9.14 906T017-04 0.04669 0.00339 0.12215 0.01039 0.01897 0.00138 0.00901 33.4 165.58 117 9.4 121.2 8.75 121.2 8.75 -406T017-05 0.06796 0.00421 0.18134 0.01385 0.01935 0.0014 0.01245 867.4 123.3 169.2 11.9 123.6 8.88 123.6 8.88 2706T017-06 0.09055 0.00402 3.04766 0.19467 0.24412 0.01754 0.17713 1437.1 82.57 1419.6 48.83 1408.1 90.87 1437.1 82.57 106T017-07 0.05117 0.00763 0.1345 0.02055 0.01907 0.0015 0.01905 248.4 311.05 128.1 18.39 121.7 9.46 121.7 9.46 506T017-08 0.05755 0.00391 0.15365 0.01246 0.01936 0.00141 0.01105 512.5 143.17 145.1 10.96 123.6 8.93 123.6 8.93 1506T017-09 0.05732 0.00338 0.15211 0.01128 0.01925 0.00139 0.00989 503.5 125.19 143.8 9.94 122.9 8.81 122.9 8.81 1506T017-10 0.10788 0.00921 0.29834 0.02808 0.02006 0.00151 0.02657 1763.9 148.29 265.1 21.96 128 9.57 128 9.57 5206T017-11 0.28553 0.01681 1.06445 0.07674 0.02704 0.00201 0.07473 3393.4 88.82 736 37.74 172 12.64 172 12.64 7706T017-12 0.05716 0.00394 0.14927 0.01221 0.01894 0.00138 0.01083 497.2 145.49 141.3 10.79 121 8.74 121 8.74 1406T017-13 0.06351 0.00877 0.16864 0.02393 0.01926 0.00152 0.02241 725.3 268.5 158.2 20.79 123 9.62 123 9.62 2206T017-14 0.09298 0.00738 0.2538 0.02271 0.0198 0.00148 0.02123 1487.4 143.3 229.7 18.4 126.4 9.34 126.4 9.34 4506T017-15 0.08736 0.00818 0.23412 0.02377 0.01944 0.00147 0.0223 1368.6 170.2 213.6 19.56 124.1 9.31 124.1 9.31 4206T017-16 0.08694 0.00629 0.22789 0.01914 0.01901 0.0014 0.01774 1359.2 133.35 208.5 15.83 121.4 8.88 121.4 8.88 4206T017-17 0.05888 0.00692 0.15448 0.01909 0.01903 0.00145 0.01764 562.7 237.43 145.9 16.79 121.5 9.2 121.5 9.2 1706T017-18 0.0892 0.00529 0.23536 0.01744 0.01914 0.00139 0.01605 1408.4 109.5 214.6 14.33 122.2 8.81 122.2 8.81 4306T017-19 0.06792 0.00563 0.18133 0.01689 0.01937 0.00143 0.01546 866 163.14 169.2 14.52 123.6 9.07 123.6 9.07 2706T017-20 0.07053 0.00396 0.18843 0.01355 0.01938 0.0014 0.01215 944 110.58 175.3 11.58 123.7 8.87 123.7 8.87 2906T017-21 0.08024 0.00573 0.21176 0.01766 0.01914 0.00141 0.01625 1202.9 134.5 195 14.8 122.2 8.91 122.2 8.91 3706T017-22 0.05057 0.00293 0.13662 0.01002 0.0196 0.00142 0.0086 221.3 128.49 130 8.95 125.1 8.96 125.1 8.96 406T017-23 0.10978 0.00909 0.294 0.02704 0.01943 0.00146 0.02558 1795.7 143.62 261.7 21.22 124 9.25 124 9.25 5306T017-24 0.04814 0.00397 0.12978 0.01209 0.01955 0.00144 0.01065 106.1 184.2 123.9 10.87 124.8 9.08 124.8 9.08 -106T017-25 0.05392 0.003 0.14507 0.01041 0.01951 0.00141 0.009 367.6 120.42 137.5 9.23 124.6 8.92 124.6 8.92 906T017-26 0.05641 0.00383 0.14729 0.01195 0.01894 0.00138 0.01057 467.9 144.43 139.5 10.57 120.9 8.72 120.9 8.72 1306T017-27 0.05799 0.01436 0.1583 0.03946 0.0198 0.00159 0.03787 529 466.81 149.2 34.59 126.4 10.07 126.4 10.07 1506T017-28 0.11011 0.01633 0.29392 0.04376 0.01936 0.00164 0.04212 1801.2 247.81 261.6 34.34 123.6 10.34 123.6 10.34 5306T017-29 0.06323 0.00357 0.17224 0.01245 0.01976 0.00143 0.01102 715.9 115.72 161.4 10.79 126.1 9.04 126.1 9.04 2206T017-30 0.07696 0.00395 0.21049 0.01442 0.01984 0.00143 0.01299 1120.1 99.17 194 12.09 126.6 9.05 126.6 9.05 3506T017-31 0.06847 0.00494 0.19215 0.0162 0.02035 0.00153 0.01467 883 142.39 178.5 13.8 129.9 9.67 129.9 9.67 2706T017-32 0.08136 0.00581 0.22556 0.01872 0.02011 0.00153 0.01719 1230 134.01 206.5 15.51 128.3 9.65 128.3 9.65 3806T017-33 0.05164 0.00236 0.1455 0.00938 0.02044 0.00151 0.00787 269.3 101.36 137.9 8.31 130.4 9.57 130.4 9.57 506T017-34 0.0679 0.00358 0.18761 0.01299 0.02004 0.00149 0.0115 865.4 105.7 174.6 11.1 127.9 9.44 127.9 9.44 2706T017-35 0.07856 0.00346 0.21328 0.01351 0.01969 0.00146 0.01205 1161 85.01 196.3 11.31 125.7 9.22 125.7 9.22 3606T017-36 0.06833 0.00313 0.18828 0.01214 0.01998 0.00148 0.01066 878.7 91.99 175.2 10.37 127.6 9.37 127.6 9.37 2706T017-37 0.06811 0.00389 0.18923 0.0137 0.02015 0.00151 0.01219 871.9 114.13 176 11.7 128.6 9.52 128.6 9.52 2706T017-38 0.08513 0.00447 0.22689 0.01564 0.01933 0.00144 0.0142 1318.5 98.65 207.6 12.94 123.4 9.12 123.4 9.12 4106T017-39 0.04941 0.00248 0.15939 0.01077 0.0234 0.00174 0.00903 167.4 113.18 150.2 9.43 149.1 10.94 149.1 10.94 106T017-40 0.05016 0.0023 0.20344 0.01313 0.02942 0.00218 0.01095 202.2 102.95 188 11.08 186.9 13.65 186.9 13.65 106T017-41 0.414 0.02305 2.59007 0.17806 0.04537 0.0035 0.17456 3960.7 80.98 1297.8 50.36 286.1 21.6 286.1 21.6 7806T017-42 0.0612 0.00338 0.16099 0.01143 0.01908 0.00142 0.01001 646.3 114.28 151.6 10 121.8 9 121.8 9 2006T017-43 0.0503 0.00265 0.13392 0.00929 0.01931 0.00144 0.00785 208.9 117.75 127.6 8.31 123.3 9.08 123.3 9.08 306T017-44 0.06395 0.00263 1.11952 0.0688 0.12697 0.00939 0.05941 739.9 84.55 762.7 32.96 770.6 53.7 770.6 53.7 -106T017-45 0.06262 0.00869 0.30898 0.04391 0.03579 0.00292 0.04099 695.4 270.97 273.4 34.06 226.7 18.19 226.7 18.19 1706T017-46 0.084 0.00348 2.47498 0.15264 0.21369 0.0158 0.13684 1292.5 78.6 1264.7 44.6 1248.4 83.95 1292.5 78.6 106T017-47 0.23047 0.0191 1.29698 0.11499 0.04082 0.00332 0.11167 3055.3 126.71 844.4 50.83 257.9 20.57 257.9 20.57 6906T017-48 0.05642 0.0037 0.15301 0.01207 0.01967 0.00148 0.01059 468.1 139.58 144.6 10.63 125.6 9.33 125.6 9.33 1306T017-49 0.06245 0.00376 0.17378 0.01298 0.02018 0.00151 0.01147 689.7 123.35 162.7 11.23 128.8 9.54 128.8 9.54 2106T017-50 0.07571 0.00518 0.2115 0.0171 0.02026 0.00153 0.01557 1087.3 131.38 194.8 14.33 129.3 9.68 129.3 9.68 3406T017-51 0.07723 0.00357 0.21816 0.01413 0.02049 0.00152 0.01261 1127.1 89.48 200.4 11.77 130.7 9.6 130.7 9.6 3506T017-52 0.04745 0.00525 0.09278 0.01089 0.01418 0.0011 0.00979 71.5 244.42 90.1 10.12 90.8 6.99 90.8 6.99 -106T017-53 0.06968 0.0064 0.18597 0.01863 0.01936 0.0015 0.01713 919 178.31 173.2 15.95 123.6 9.47 123.6 9.47 2906T017-54 0.04992 0.00218 0.15921 0.01005 0.02313 0.00171 0.00834 191.5 98.44 150 8.8 147.4 10.79 147.4 10.79 206T017-55 0.05366 0.00494 0.15201 0.01534 0.02055 0.00158 0.01376 356.6 195.75 143.7 13.52 131.1 9.95 131.1 9.95 906T017-56 0.06648 0.00346 0.18016 0.01239 0.01965 0.00146 0.01093 821.7 105.1 168.2 10.66 125.5 9.25 125.5 9.25 2506T017-57 0.06277 0.00316 0.17035 0.01152 0.01968 0.00146 0.01006 700.6 103.84 159.7 10 125.6 9.25 125.6 9.25 2106T017-58 0.09464 0.00681 0.25091 0.02087 0.01923 0.00147 0.0194 1520.9 129.89 227.3 16.94 122.8 9.28 122.8 9.28 4606T017-59 0.0766 0.0035 0.21218 0.01367 0.02009 0.00149 0.01218 1110.9 88.76 195.4 11.45 128.2 9.42 128.2 9.42 3406T017-60 0.05075 0.00309 0.18782 0.01417 0.02684 0.00201 0.01216 229.5 134.87 174.8 12.12 170.8 12.59 170.8 12.59 206T017-61 0.04967 0.00346 0.09631 0.00792 0.01406 0.00106 0.00686 179.4 154.72 93.4 7.34 90 6.72 90 6.72 4

n=42


Isotope ratios


06T17

1400

1000

600

200

0.0

0.1

0.2

0.3

0 1 2 3 4

207Pb/235U

206 P

b/23

8 U


06T17

280

240

200

160

120

80

400.005

0.015

0.025

0.035

0.045

0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36

207Pb/235U

206 P

b/23

8 U


JAXX1 volcaniclastic sandstoneAge estimates (ma)

Analysis_#207Pb/206Pb 1σ

207Pb/235U 1σ206Pb/238U 1σ rho

207Pb/206Pb 1σ207Pb/235U 1σ

206Pb/238U 1σ age 1σ % discJAXX1-01 0.06811 0.00277 1.42634 0.0808 0.15192 0.01002 0.07078 871.8 82.16 900 33.81 911.7 56.06 911.7 56.06 -1JAXX1-02 0.07319 0.00411 0.261 0.01766 0.02587 0.00173 0.01593 1019.3 109.59 235.5 14.22 164.6 10.87 164.6 10.87 30JAXX1-03 0.05609 0.00222 0.61064 0.03414 0.07897 0.0052 0.02894 455.6 85.21 484 21.52 490 31.08 490 31.08 -1JAXX1-04 0.14024 0.00545 5.65058 0.31322 0.29228 0.01925 0.29397 2230.2 65.81 1923.9 47.82 1652.9 96.02 2230.2 65.81 14JAXX1-05 0.04975 0.00207 0.17238 0.00987 0.02514 0.00166 0.00821 183.2 94.01 161.5 8.54 160 10.42 160 10.42 1JAXX1-06 0.06877 0.00287 0.24781 0.01419 0.02614 0.00172 0.01247 891.9 83.74 224.8 11.55 166.3 10.83 166.3 10.83 26JAXX1-07 0.04926 0.00318 0.17332 0.01297 0.02552 0.00171 0.01126 160.4 144.61 162.3 11.23 162.5 10.73 162.5 10.73 0JAXX1-08 0.05311 0.00613 0.19015 0.02265 0.02597 0.00184 0.02081 333.7 242.36 176.8 19.33 165.3 11.59 165.3 11.59 7JAXX1-09 0.12347 0.00484 3.81995 0.21247 0.22444 0.01479 0.19768 2006.9 67.98 1597 44.76 1305.3 77.85 2006.9 67.98 18JAXX1-10 0.06758 0.00268 1.24837 0.06981 0.13401 0.00883 0.06098 855.6 80.21 822.7 31.53 810.7 50.19 810.7 50.19 1JAXX1-11 0.16801 0.00695 11.21798 0.63944 0.48437 0.03206 0.60738 2537.9 67.75 2541.4 53.14 2546.3 139.25 2537.9 67.75 0JAXX1-12 0.05449 0.00251 0.11432 0.00691 0.01522 0.00101 0.0059 391.3 99.8 109.9 6.3 97.4 6.39 97.4 6.39 11JAXX1-13 0.0518 0.00256 0.18828 0.01183 0.02637 0.00175 0.01008 276.5 109.29 175.2 10.11 167.8 10.97 167.8 10.97 4JAXX1-14 0.26833 0.01427 0.15641 0.00998 0.00423 0.00029 0.00969 3296.3 81.05 147.6 8.76 27.2 1.85 27.2 1.85 82JAXX1-15 0.05007 0.00222 0.17742 0.0105 0.02571 0.0017 0.0088 198.1 99.83 165.8 9.05 163.6 10.67 163.6 10.67 1JAXX1-16 0.15341 0.0062 0.89957 0.05068 0.04254 0.00281 0.04787 2384.3 67.22 651.5 27.09 268.5 17.36 268.5 17.36 59JAXX1-18 0.14804 0.00961 0.52563 0.03855 0.02576 0.00177 0.03678 2323.4 107.26 428.9 25.66 163.9 11.15 163.9 11.15 62JAXX1-19 0.07134 0.00282 1.5055 0.08405 0.15309 0.01009 0.07396 967.1 78.59 932.6 34.06 918.3 56.39 918.3 56.39 2JAXX1-20 0.06177 0.00247 0.85789 0.04815 0.10075 0.00664 0.04151 666.3 83.28 629 26.31 618.8 38.88 618.8 38.88 2JAXX1-21 0.0511 0.00208 0.18324 0.01038 0.02601 0.00171 0.00867 245.4 91.07 170.8 8.91 165.5 10.77 165.5 10.77 3JAXX1-22 0.04934 0.00248 0.1768 0.01122 0.02599 0.00172 0.0095 164.1 113.33 165.3 9.68 165.4 10.82 165.4 10.82 0JAXX1-24 0.18897 0.00735 12.54305 0.69521 0.48152 0.03171 0.6635 2733.2 62.61 2646 52.12 2533.9 137.99 2733.2 62.61 4JAXX1-25 0.05074 0.00218 0.17244 0.01003 0.02465 0.00163 0.0084 229.1 96.09 161.5 8.68 157 10.23 157 10.23 3JAXX1-26 0.07594 0.00297 1.9211 0.10674 0.18352 0.01209 0.09465 1093.4 76.35 1088.4 37.1 1086.2 65.84 1093.4 76.35 0JAXX1-27 0.16512 0.00643 6.40182 0.35507 0.28125 0.01852 0.33655 2508.8 64.06 2032.5 48.71 1597.6 93.2 2508.8 64.06 21JAXX1-28 0.18665 0.00777 12.26259 0.70081 0.4766 0.03158 0.66923 2712.9 67.05 2624.7 53.65 2512.4 137.88 2712.9 67.05 4JAXX1-29 0.06414 0.00288 0.91155 0.05427 0.1031 0.00682 0.04745 746.3 92.16 657.9 28.83 632.5 39.85 632.5 39.85 4JAXX1-30 0.0915 0.00522 0.68238 0.04655 0.0541 0.00364 0.04291 1456.8 104.93 528.2 28.09 339.7 22.23 339.7 22.23 36JAXX1-31 0.06234 0.00118 0.69645 0.01765 0.08102 0.00225 0.0154 686 39.82 536.7 10.57 502.2 13.42 502.2 13.42 6JAXX1-32 0.06421 0.00241 0.22565 0.00911 0.02549 0.00074 0.00837 748.5 77.51 206.6 7.54 162.3 4.66 162.3 4.66 21JAXX1-33 0.05567 0.0021 0.20023 0.00814 0.02609 0.00075 0.00739 438.9 82.07 185.3 6.88 166 4.74 166 4.74 10JAXX1-34 0.07041 0.00264 0.24679 0.00993 0.02542 0.00074 0.00919 940.4 75.08 224 8.08 161.8 4.66 161.8 4.66 28JAXX1-35 0.06166 0.00155 0.69192 0.02077 0.08139 0.00229 0.01848 662.4 53.02 534 12.47 504.4 13.65 504.4 13.65 6JAXX1-36 0.06493 0.00326 0.24374 0.01258 0.02723 0.00083 0.01175 772 102.3 221.5 10.27 173.2 5.18 173.2 5.18 22JAXX1-37 0.04701 0.00241 0.05442 0.00288 0.0084 0.00025 0.00263 49.2 118.36 53.8 2.77 53.9 1.6 53.9 1.6 0JAXX1-38 0.16729 0.00334 8.09153 0.22442 0.3508 0.01185 0.21257 2531 33.01 2241 25.11 1938.5 56.23 2531 33.01 13JAXX1-39 0.06236 0.00289 0.24798 0.01196 0.02884 0.00086 0.0111 686.5 96.06 224.9 9.73 183.3 5.39 183.3 5.39 18JAXX1-40 0.04892 0.00202 0.18897 0.0083 0.02802 0.00081 0.00749 144 94.21 175.8 7.08 178.1 5.1 178.1 5.1 -1JAXX1-41 0.07184 0.00126 1.30393 0.0318 0.13164 0.00365 0.02815 981.4 35.23 847.5 14.02 797.2 20.79 797.2 20.79 6JAXX1-42 0.06229 0.00155 0.86056 0.02562 0.10021 0.00282 0.0228 684 52.16 630.4 13.98 615.6 16.51 615.6 16.51 2JAXX1-43 0.08322 0.0016 2.01335 0.05147 0.17547 0.00489 0.04658 1274.2 75.01 1120 17.34 1042.2 26.79 1274.2 75.01 7JAXX1-44 0.10846 0.00198 3.44902 0.08583 0.23064 0.00641 0.07942 1773.6 75.01 1515.6 19.59 1337.9 33.59 1773.6 75.01 12JAXX1-45 0.04643 0.00201 0.10529 0.0048 0.01645 0.00048 0.00432 19.9 100.7 101.6 4.41 105.2 3.04 105.2 3.04 -4JAXX1-46 0.07618 0.00145 1.89144 0.04814 0.18007 0.00501 0.04313 1099.9 75.01 1078.1 16.9 1067.4 27.36 1099.9 75.01 1JAXX1-47 0.09225 0.00195 3.20552 0.08621 0.25203 0.00706 0.07915 1472.4 75.01 1458.5 20.81 1448.9 36.35 1472.4 75.01 1JAXX1-48 0.0668 0.00392 0.26049 0.01547 0.02828 0.00089 0.01458 831.6 117.81 235.1 12.46 179.8 5.56 179.8 5.56 24JAXX1-49 0.05398 0.00159 0.1345 0.0045 0.01807 0.00051 0.00399 370.2 64.72 128.1 4.03 115.4 3.24 115.4 3.24 10JAXX1-50 0.05242 0.00264 0.1993 0.01035 0.02757 0.00083 0.00952 303.8 110.66 184.5 8.76 175.3 5.18 175.3 5.18 5JAXX1-51 0.07091 0.00174 0.47871 0.01413 0.04896 0.00138 0.01275 954.9 49.51 397.2 9.71 308.1 8.47 308.1 8.47 22JAXX1-52 0.10434 0.00184 1.98082 0.04844 0.13769 0.00382 0.04462 1702.8 32.09 1109 16.5 831.6 21.64 831.6 21.64 25JAXX1-54 0.05982 0.00116 0.62461 0.01603 0.07573 0.00211 0.01392 597.2 41.33 492.7 10.02 470.6 12.62 470.6 12.62 4JAXX1-55 0.05362 0.00309 0.19191 0.01127 0.02596 0.0008 0.01047 355 124.61 178.3 9.6 165.2 5 165.2 5 7JAXX1-56 0.05398 0.00167 0.1965 0.00683 0.0264 0.00075 0.00608 370 67.99 182.2 5.79 168 4.71 168 4.71 8JAXX1-57 0.10499 0.00186 2.46733 0.06048 0.17045 0.00473 0.05575 1714.1 75.01 1262.5 17.71 1014.6 26.05 1714.1 75.01 20JAXX1-58 0.04761 0.00269 0.10961 0.00633 0.0167 0.0005 0.00583 79 129.61 105.6 5.79 106.8 3.2 106.8 3.2 -1JAXX1-59 0.05729 0.00181 0.67889 0.02393 0.08594 0.00245 0.02148 502.4 68.4 526.1 14.47 531.5 14.54 531.5 14.54 -1JAXX1-60 0.27678 0.00477 25.63976 0.6203 0.67187 0.01864 0.60166 3344.9 75.01 3332.9 23.64 3313.1 71.88 3344.9 75.01 1

n=53


Isotope ratios

• All uncertainties are reported at the 1σ level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

1400

1800

2200

2600

3000

3400

0.0

0.2

0.4

0.6

0.8

0 10 20 30

206 P

b/23

8 U

207Pb/235U

JAXX1

data-point error ellipses are 2σ


Analysis_#207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ rho

207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ age 1σ % discJAXX2-01 0.16875 0.00699 9.87411 0.58785 0.42479 0.02897 0.55888 2545.3 67.75 2423.1 54.89 2282.2 131.09 2545.3 67.75 6JAXX2-04 0.04758 0.00254 0.17687 0.01204 0.02699 0.00185 0.01019 77.8 122.96 165.4 10.39 171.7 11.6 171.7 11.6 -4JAXX2-05 0.08952 0.0037 2.90816 0.17309 0.23586 0.01607 0.15702 1415.1 77.11 1384 44.97 1365.1 83.8 1415.1 77.11 1JAXX2-06 0.1689 0.00716 11.24234 0.67632 0.48323 0.03303 0.64329 2546.8 69.33 2543.4 56.09 2541.3 143.54 2546.8 69.33 0JAXX2-07 0.06737 0.00293 1.35777 0.08281 0.14632 0.00998 0.07283 849.1 87.99 870.9 35.66 880.3 56.12 880.3 56.12 -1JAXX2-08 0.05693 0.00304 0.69045 0.04691 0.08806 0.00604 0.04087 488 114.18 533.1 28.18 544 35.81 544 35.81 -2JAXX2-09 0.06664 0.00434 0.83606 0.06424 0.09109 0.00633 0.05791 826.5 130.25 617 35.53 562 37.4 562 37.4 9JAXX2-10 0.05661 0.00249 0.67275 0.04126 0.08628 0.00588 0.03538 475.5 95.19 522.4 25.04 533.5 34.92 533.5 34.92 -2JAXX2-11 0.07776 0.00321 2.04198 0.12155 0.19065 0.01298 0.10857 1140.6 80.05 1129.6 40.57 1124.9 70.3 1140.6 80.05 0JAXX2-12 0.10187 0.00418 4.05498 0.24052 0.28899 0.01968 0.22084 1658.4 74.08 1645.3 48.31 1636.5 98.44 1658.4 74.08 1JAXX2-13 0.0774 0.00442 2.10756 0.14887 0.19769 0.01367 0.1352 1131.5 109.76 1151.3 48.64 1162.9 73.6 1131.5 109.8 -1JAXX2-14 0.06184 0.00358 0.74725 0.05331 0.08772 0.00605 0.04726 668.6 119.37 566.6 30.98 542.1 35.84 542.1 35.84 4JAXX2-15 0.10168 0.00414 4.00724 0.23694 0.2861 0.01948 0.21746 1655.1 73.58 1635.7 48.05 1622 97.64 1655.1 73.58 1JAXX2-16 0.05871 0.0026 0.7251 0.04457 0.08966 0.00612 0.03845 556.3 93.63 553.7 26.23 553.6 36.18 553.6 36.18 0JAXX2-17 0.0572 0.0025 0.68996 0.04217 0.08757 0.00597 0.0362 498.7 94.41 532.8 25.34 541.1 35.39 541.1 35.39 -2JAXX2-18 0.07324 0.00301 1.64489 0.09771 0.16305 0.0111 0.08661 1020.6 81.09 987.6 37.51 973.7 61.54 973.7 61.54 1JAXX2-19 0.05728 0.00251 0.66538 0.04075 0.08433 0.00575 0.035 501.8 94.32 517.9 24.85 521.9 34.19 521.9 34.19 -1JAXX2-20 0.16587 0.00693 7.6796 0.4589 0.33612 0.02294 0.43596 2516.4 68.54 2194.2 53.68 1868 110.67 2516.4 68.54 15JAXX2-21 0.06052 0.00405 0.73653 0.05769 0.08835 0.00614 0.05155 622.3 137.97 560.4 33.73 545.8 36.36 545.8 36.36 3JAXX2-22 0.06966 0.00288 1.39591 0.08306 0.14548 0.00991 0.07315 918.3 82.65 887.2 35.2 875.6 55.75 875.6 55.75 1JAXX2-23 0.05543 0.00381 0.65649 0.05246 0.08599 0.00597 0.04649 429.2 146.5 512.5 32.16 531.8 35.46 531.8 35.46 -4JAXX2-24 0.07009 0.00309 1.39737 0.08574 0.14474 0.00988 0.07586 931 87.97 887.8 36.31 871.4 55.62 871.4 55.62 2JAXX2-25 0.05714 0.00252 0.70398 0.04324 0.08944 0.0061 0.03714 496.5 94.97 541.2 25.77 552.2 36.09 552.2 36.09 -2JAXX2-26 0.05023 0.00254 0.13346 0.0088 0.01929 0.00132 0.00748 205.8 113.23 127.2 7.88 123.2 8.35 123.2 8.35 3JAXX2-27 0.05513 0.00249 0.65222 0.04054 0.08589 0.00586 0.03468 417.3 97.74 509.8 24.91 531.2 34.79 531.2 34.79 -4JAXX2-28 0.06671 0.00358 1.36495 0.09294 0.14855 0.01022 0.08272 828.7 108.01 874 39.9 892.8 57.34 892.8 57.34 -2JAXX2-29 0.07775 0.00321 2.05739 0.12247 0.1921 0.01308 0.10939 1140.5 80.06 1134.8 40.67 1132.8 70.75 1140.5 80.06 0JAXX2-30 0.12556 0.00573 6.11084 0.38052 0.35332 0.02423 0.35629 2036.8 78.54 1991.8 54.34 1950.4 115.43 2036.8 78.54 2JAXX2-31 0.0639 0.00285 1.23843 0.07734 0.14056 0.00974 0.0676 738.3 91.64 818.2 35.08 847.9 55.06 847.9 55.06 -4JAXX2-32 0.10012 0.00435 3.74745 0.23107 0.27148 0.01883 0.21224 1626.2 78.77 1581.6 49.42 1548.3 95.45 1626.2 78.77 2JAXX2-33 0.16655 0.00683 9.08663 0.54582 0.39568 0.02739 0.51843 2523.3 67.29 2346.8 54.95 2149.1 126.49 2523.3 67.29 8JAXX2-34 0.05687 0.00241 0.70215 0.04279 0.08954 0.00619 0.0366 486 91.39 540.1 25.53 552.8 36.65 552.8 36.65 -2JAXX2-35 0.05895 0.00285 0.71094 0.04626 0.08747 0.00607 0.04019 565.3 102.07 545.3 27.45 540.5 36.01 540.5 36.01 1JAXX2-36 0.05527 0.0032 0.67817 0.04882 0.08898 0.00622 0.0426 423.2 124.34 525.7 29.54 549.5 36.81 549.5 36.81 -5JAXX2-37 0.22729 0.0091 10.71632 0.63746 0.34195 0.02363 0.61383 3033.1 62.78 2498.8 55.24 1896.1 113.51 3033.1 62.78 24JAXX2-38 0.05597 0.00342 0.65024 0.04843 0.08425 0.0059 0.04253 451 130.56 508.6 29.8 521.5 35.09 521.5 35.09 -3JAXX2-39 0.06157 0.00338 0.75208 0.05239 0.08859 0.00618 0.04621 659.2 113.37 569.4 30.36 547.2 36.62 547.2 36.62 4JAXX2-40 0.05719 0.00292 0.72115 0.04829 0.09145 0.00636 0.04193 498.3 109.23 551.3 28.49 564.1 37.58 564.1 37.58 -2JAXX2-41 0.07304 0.00356 1.74024 0.11357 0.17281 0.01202 0.10155 1014.9 95.76 1023.6 42.08 1027.6 66.09 1014.9 95.76 0JAXX2-42 0.06678 0.003 1.24918 0.07831 0.13567 0.00941 0.0689 830.9 91.05 823 35.35 820.1 53.39 820.1 53.39 0JAXX2-43 0.06859 0.00283 1.36206 0.08207 0.14403 0.00996 0.07211 886.4 83 872.8 35.28 867.4 56.12 867.4 56.12 1JAXX2-44 0.05947 0.00257 0.81576 0.05016 0.09948 0.00689 0.04327 584.4 90.99 605.7 28.05 611.4 40.37 611.4 40.37 -1JAXX2-45 0.05926 0.00715 0.84665 0.10706 0.10363 0.00759 0.09947 576.5 242.81 622.8 58.87 635.6 44.35 635.6 44.35 -2JAXX2-46 0.06542 0.00282 1.22601 0.07536 0.13591 0.00941 0.06595 788 88 812.5 34.37 821.5 53.4 821.5 53.4 -1JAXX2-47 0.06581 0.0029 0.90246 0.05603 0.09946 0.00689 0.04914 800.2 89.71 653 29.9 611.3 40.4 611.3 40.4 6JAXX2-48 0.06084 0.00248 0.6982 0.04187 0.08323 0.00575 0.03612 633.7 85.47 537.7 25.03 515.4 34.23 515.4 34.23 4JAXX2-49 0.06115 0.00249 0.84718 0.05077 0.10047 0.00694 0.04383 644.7 85.21 623.1 27.91 617.2 40.68 617.2 40.68 1JAXX2-50 0.05723 0.0026 0.66477 0.04191 0.08424 0.00584 0.03607 500 97.59 517.5 25.56 521.4 34.71 521.4 34.71 -1JAXX2-51 0.06544 0.00306 0.70646 0.04517 0.0783 0.00543 0.03974 788.5 95.34 542.6 26.88 486 32.49 486 32.49 10JAXX2-52 0.0735 0.00303 1.52416 0.09182 0.1504 0.0104 0.08142 1027.8 81.23 940.2 36.94 903.2 58.28 903.2 58.28 4JAXX2-53 0.23098 0.00982 12.40828 0.75569 0.38961 0.02707 0.72862 3058.9 66.39 2635.8 57.23 2121 125.6 3058.9 66.39 20JAXX2-54 0.06859 0.00299 1.26923 0.0784 0.1342 0.0093 0.0691 886.5 87.57 832 35.08 811.8 52.83 811.8 52.83 2JAXX2-55 0.07803 0.00317 1.7127 0.10256 0.1592 0.011 0.09156 1147.6 78.73 1013.3 38.39 952.3 61.2 952.3 61.2 6JAXX2-56 0.06583 0.00294 1.20628 0.07537 0.1329 0.00921 0.06616 801 90.85 803.5 34.69 804.4 52.41 804.4 52.41 0JAXX2-57 0.16558 0.00689 8.49393 0.51327 0.37204 0.02578 0.48749 2513.5 68.32 2285.3 54.89 2039 121.11 2513.5 68.32 11JAXX2-58 0.06037 0.00404 0.69803 0.05512 0.08386 0.00591 0.04921 616.8 138.21 537.6 32.96 519.1 35.16 519.1 35.16 3JAXX2-59 0.0733 0.00356 1.70219 0.11079 0.16843 0.01172 0.09907 1022.2 95.19 1009.4 41.63 1003.5 64.64 1022.2 95.19 1JAXX2-60 0.16576 0.00667 8.79327 0.52396 0.38475 0.02659 0.49737 2515.3 66.05 2316.8 54.32 2098.4 123.79 2515.3 66.05 9

n=58

• All uncertainties are reported at the 1σ level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma


Isotope ratios

• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88

JAXX2

3000

2600

2200

1800

1400

1000

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0 4 8 12 16 20

207Pb/235U

206 P

b/23

8 U


JAXX2

900

700

500

300

100

0.00

0.04

0.08

0.12

0.16

0.0 0.4 0.8 1.2 1.6

207Pb/235U

206 P

b/23

8 U


JAXX3 volcaniclastic conglomerateAge estimates (ma)


207Pb/235U 1σ206Pb/238U 1σ rho

207Pb/206Pb 1σ207Pb/235U 1σ

206Pb/238U 1σ age 1σ % discJAXX3-02 0.0682 0.00565 0.25335 0.02296 0.02694 0.00188 0.02108 874.7 162.66 229.3 18.6 171.4 11.81 171.4 11.81 25JAXX3-03 0.06634 0.00459 0.2086 0.01654 0.0228 0.00157 0.01497 817.1 138.29 192.4 13.9 145.4 9.88 145.4 9.88 24JAXX3-04 0.06552 0.00438 0.17759 0.01377 0.01966 0.00135 0.01242 790.9 134.43 166 11.87 125.5 8.51 125.5 8.51 24JAXX3-05 0.06217 0.01058 0.16282 0.0277 0.01899 0.00151 0.02619 679.8 327.08 153.2 24.19 121.3 9.53 121.3 9.53 21JAXX3-06 0.05882 0.00448 0.14711 0.01245 0.01814 0.00126 0.01119 560.5 157.73 139.4 7.98 115.9 7.98 115.9 7.98 17JAXX3-07 0.11165 0.00534 3.35499 0.20834 0.21799 0.01487 0.19347 1826.4 84.25 1494 78.7 1271.2 78.7 1494 78.7 15JAXX3-08 0.05523 0.00613 0.14307 0.0165 0.01879 0.00136 0.01514 421.5 230.48 135.8 8.59 120 8.59 120 8.59 12JAXX3-09 0.05525 0.00418 0.16959 0.0144 0.02226 0.00153 0.01287 422.2 160.77 159.1 12.5 141.9 9.67 141.9 9.67 11JAXX3-10 0.05364 0.00367 0.14088 0.01105 0.01905 0.00131 0.00974 355.7 147.25 133.8 8.29 121.7 8.29 121.7 8.29 9JAXX3-11 0.05338 0.00294 0.13718 0.00931 0.01864 0.00127 0.00804 344.9 119.45 130.5 8.03 119.1 8.03 119.1 8.03 9JAXX3-12 0.05324 0.00695 0.13542 0.01816 0.01845 0.00134 0.01682 338.9 271.51 129 16.24 117.8 8.51 117.8 8.51 9JAXX3-13 0.05316 0.01055 0.13568 0.02687 0.01851 0.00148 0.02539 335.5 396.36 129.2 24.03 118.2 9.38 118.2 9.38 9JAXX3-14 0.05416 0.01198 0.20021 0.04388 0.02681 0.00228 0.0416 377.4 433.24 185.3 37.12 170.6 14.29 170.6 14.29 8JAXX3-15 0.05283 0.00569 0.13707 0.01543 0.01882 0.00135 0.01408 321.6 227.88 130.4 8.54 120.2 8.54 120.2 8.54 8JAXX3-16 0.05272 0.01259 0.13718 0.03238 0.01887 0.00165 0.03073 316.7 467.74 130.5 28.92 120.5 10.44 120.5 10.44 8JAXX3-17 0.05229 0.00347 0.13443 0.01031 0.01865 0.00128 0.00903 297.9 144.29 128.1 8.1 119.1 8.1 119.1 8.1 7JAXX3-18 0.05194 0.00485 0.13184 0.01322 0.01841 0.00129 0.01193 282.7 199.99 125.7 11.86 117.6 8.15 117.6 8.15 6JAXX3-19 0.05398 0.00488 0.24377 0.0238 0.03275 0.00229 0.02151 370.3 191.79 221.5 19.43 207.7 14.27 207.7 14.27 6JAXX3-20 0.05131 0.00256 0.132 0.00852 0.01866 0.00126 0.00726 254.6 110.69 125.9 7.64 119.2 7.96 119.2 7.96 5JAXX3-21 0.05085 0.00458 0.13032 0.01271 0.01859 0.00129 0.01142 234.1 195.37 124.4 11.41 118.7 8.19 118.7 8.19 5JAXX3-22 0.05047 0.00599 0.12693 0.01557 0.01825 0.00132 0.01425 216.5 253.07 121.3 8.37 116.6 8.37 116.6 8.37 4JAXX3-23 0.05024 0.0032 0.1255 0.00943 0.01812 0.00123 0.0082 206.1 141.18 120.1 8.51 115.7 7.8 115.7 7.8 4JAXX3-24 0.05148 0.00384 0.19094 0.01598 0.02691 0.00186 0.01412 262.2 162.91 177.4 11.67 171.2 11.67 171.2 11.67 3JAXX3-25 0.05199 0.00409 0.22629 0.01969 0.03157 0.00219 0.0175 285.1 170.18 207.1 13.7 200.4 13.7 200.4 13.7 3JAXX3-26 0.05011 0.0026 0.13273 0.00869 0.01921 0.0013 0.00739 200 116.13 126.5 8.24 122.7 8.24 122.7 8.24 3JAXX3-27 0.0498 0.00473 0.12653 0.01282 0.01843 0.0013 0.01152 185.6 207.21 121 8.21 117.7 8.21 117.7 8.21 3JAXX3-28 0.04978 0.00282 0.12997 0.00905 0.01893 0.00128 0.00777 184.9 126.71 124.1 8.13 120.9 8.11 120.9 8.11 3JAXX3-29 0.05075 0.00379 0.19071 0.01608 0.02725 0.00187 0.01421 229.6 164.05 177.2 13.71 173.3 11.74 173.3 11.74 2JAXX3-30 0.0505 0.00215 0.18423 0.01096 0.02646 0.00178 0.00918 218.1 95.84 171.7 9.39 168.3 11.15 168.3 11.15 2JAXX3-31 0.05048 0.00235 0.1898 0.01181 0.02727 0.00183 0.00998 217.3 104.41 176.5 10.08 173.4 11.51 173.4 11.51 2JAXX3-32 0.05034 0.00408 0.18647 0.01662 0.02687 0.00187 0.01475 210.7 177.63 173.6 11.72 170.9 11.72 170.9 11.72 2JAXX3-33 0.0492 0.00305 0.13166 0.00964 0.01941 0.00133 0.00831 157.5 138.76 125.6 8.39 123.9 8.39 123.9 8.39 1JAXX3-34 0.0501 0.00244 0.18705 0.01192 0.02708 0.00182 0.0101 199.7 109.38 174.1 10.2 172.2 11.44 172.2 11.44 1JAXX3-35 0.049 0.00258 0.13257 0.00875 0.01963 0.00133 0.00742 147.9 119.07 126.4 8.43 125.3 8.43 125.3 8.43 1JAXX3-36 0.04879 0.00346 0.1251 0.01007 0.0186 0.00128 0.00879 137.8 158.45 119.7 8.1 118.8 8.1 118.8 8.1 1JAXX3-37 0.04869 0.00952 0.1316 0.02571 0.01961 0.00156 0.02415 133.1 404.18 125.5 9.84 125.2 9.84 125.2 9.84 0JAXX3-38 0.04834 0.00342 0.1256 0.0101 0.01885 0.0013 0.0088 115.7 158.86 120.1 8.21 120.4 8.21 120.4 8.21 0JAXX3-39 0.04829 0.00252 0.12499 0.0082 0.01878 0.00127 0.00693 113.3 118.59 119.6 8.07 119.9 8.07 119.9 8.07 0JAXX3-40 0.04914 0.00249 0.17987 0.01172 0.02654 0.00179 0.00993 154.6 114.45 167.9 10.08 168.9 11.24 168.9 11.24 -1JAXX3-41 0.04803 0.00243 0.12297 0.00794 0.01857 0.00126 0.00668 100.7 115.57 117.8 7.97 118.6 7.97 118.6 7.97 -1JAXX3-42 0.04848 0.00265 0.14629 0.00988 0.02189 0.00149 0.00839 122.6 123.79 138.6 9.39 139.6 9.39 139.6 9.39 -1JAXX3-43 0.04802 0.00244 0.12878 0.00833 0.01945 0.00132 0.00701 99 117.33 123 8.34 124.2 8.34 124.2 8.34 -1JAXX3-44 0.04847 0.0024 0.17405 0.01121 0.02604 0.00175 0.00946 122.2 112.87 162.9 9.69 165.7 11.02 165.7 11.02 -2JAXX3-45 0.04721 0.0029 0.11936 0.00878 0.01834 0.00124 0.00754 59.6 140.84 114.5 7.96 117.1 7.87 117.1 7.87 -2JAXX3-46 0.04722 0.00455 0.12362 0.01271 0.01899 0.00133 0.01138 59.9 215.53 118.3 8.44 121.3 8.44 121.3 8.44 -3JAXX3-47 0.04699 0.00468 0.12535 0.0133 0.01935 0.00135 0.01195 48.2 222.26 119.9 12 123.5 8.55 123.5 8.55 -3JAXX3-48 0.04847 0.0021 0.20943 0.0124 0.03135 0.00212 0.01028 122 98.86 193.1 13.23 199 13.23 199 13.23 -3JAXX3-49 0.04679 0.00859 0.11685 0.02151 0.01811 0.00141 0.0201 38.2 388.93 112.2 19.55 115.7 8.94 115.7 8.94 -3JAXX3-50 0.04692 0.00275 0.12628 0.009 0.01952 0.00132 0.00768 45.1 134.77 120.8 8.11 124.6 8.36 124.6 8.36 -3JAXX3-51 0.0468 0.00208 0.12454 0.00748 0.0193 0.0013 0.00618 38.9 103.38 119.2 8.25 123.3 8.25 123.3 8.25 -3JAXX3-52 0.04651 0.00242 0.11957 0.00791 0.01864 0.00126 0.00665 24 120.45 114.7 7.18 119.1 7.96 119.1 7.96 -4JAXX3-53 0.04615 0.00523 0.12609 0.01493 0.01981 0.00141 0.01352 5.5 252.47 120.6 13.46 126.5 8.91 126.5 8.91 -5JAXX3-54 0.04598 0.00257 0.12093 0.00829 0.01908 0.0013 0.00699 0.1 125.84 115.9 8.21 121.8 8.21 121.8 8.21 -5JAXX3-55 0.04601 0.00187 0.12291 0.00707 0.01938 0.00131 0.00576 0.1 92.47 117.7 8.27 123.7 8.27 123.7 8.27 -5JAXX3-56 0.0457 0.00382 0.11631 0.01064 0.01846 0.00128 0.00936 0.1 172.59 111.7 8.11 117.9 8.11 117.9 8.11 -6JAXX3-57 0.046 0.00236 0.13901 0.00903 0.02192 0.00149 0.00754 0.1 116.51 132.2 9.38 139.8 9.38 139.8 9.38 -6JAXX3-58 0.04594 0.00712 0.14037 0.022 0.02217 0.00168 0.02032 0.1 331.31 133.4 10.58 141.3 10.58 141.3 10.58 -6JAXX3-59 0.04545 0.00319 0.11554 0.00933 0.01844 0.00126 0.00807 0.1 130.3 111 8.49 117.8 7.95 117.8 7.95 -6JAXX3-60 0.04631 0.00315 0.1737 0.01368 0.0272 0.00185 0.01183 14 155.87 162.6 11.84 173 11.63 173 11.63 -6

n=54

• U/Pb and 206Pb/ 207Pb fractionation is calibrated relative to fragments of 91500 zircon standard (Wiedenbeck et al. 1995) the age of which is 1065 ± 0.4 Ma• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (those in italics are not considered further)

Isotope ratios

• All uncertainties are reported at the 1σ level, and include only measurement errors. Systematic errors would increase age uncertainties by 1-2%.• Common Pb correction is from 204Pb, with composition interpreted from Stacey and Kramers (1975) and uncertainties of 1.0 for 206Pb/204Pb, 0.3 for 207Pb/204Pb, and 2.0 for 208Pb/204Pb.

JAXX3

1400

1000

600

200

0.0

0.1

0.2

0.3

0 1 2 3 4 5

207Pb/235U

206 P

b/23

8 U


JAXX3

240

200

160

120

80

400.005

0.015

0.025

0.035

0.04 0.08 0.12 0.16 0.20 0.24 0.28

207Pb/235U

206 P

b/23

8 U


JAXX4 orthoquartziteAge estimates (ma)

Analysis_#207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ rho

207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ age 1σ % discJAXX4-01 0.06944 0.00631 0.19086 0.01865 0.01993 0.00141 0.01724 911.9 176.65 177.4 15.9 127.2 8.93 127.2 8.93 28JAXX4-02 0.15599 0.01208 0.43942 0.03714 0.02043 0.00147 0.03567 2412.6 125.86 369.8 26.2 130.4 9.28 130.4 9.28 65JAXX4-03 0.04588 0.006 0.1136 0.01532 0.01796 0.0013 0.01402 0.1 279.9 109.3 13.97 114.7 8.24 114.7 8.24 -5JAXX4-04 0.05065 0.00581 0.13798 0.01653 0.01976 0.00142 0.01511 224.7 245 131.2 14.75 126.1 8.96 126.1 8.96 4JAXX4-05 0.05311 0.00272 0.14621 0.00963 0.01997 0.00135 0.00828 333.2 111.82 138.6 8.53 127.4 8.54 127.4 8.54 8JAXX4-06 0.05104 0.00499 0.12595 0.01315 0.0179 0.00126 0.01189 242.7 210.54 120.5 11.86 114.3 7.98 114.3 7.98 5JAXX4-07 0.07002 0.0082 0.17686 0.02139 0.01832 0.00135 0.02004 929.1 223.54 165.4 18.45 117 8.53 117 8.53 29JAXX4-08 0.07257 0.00715 0.2003 0.02093 0.02002 0.00143 0.0195 1002 188.01 185.4 17.7 127.8 9.03 127.8 9.03 31JAXX4-09 0.06495 0.00282 0.17876 0.0108 0.01996 0.00135 0.00945 772.6 88.93 167 9.3 127.4 8.5 127.4 8.5 24JAXX4-10 0.11165 0.00551 0.28353 0.0182 0.01842 0.00125 0.01695 1826.4 86.94 253.5 14.4 117.6 7.92 117.6 7.92 54JAXX4-11 0.04727 0.00265 0.13123 0.00913 0.02013 0.00137 0.00776 62.5 128.91 125.2 8.2 128.5 8.63 128.5 8.63 -3JAXX4-12 0.05205 0.00314 0.13377 0.00974 0.01864 0.00127 0.00847 287.8 132.13 127.5 8.72 119 8.03 119 8.03 7JAXX4-13 0.10485 0.00673 0.28689 0.02156 0.01984 0.00137 0.02019 1711.6 113.61 256.1 17.01 126.7 8.67 126.7 8.67 51JAXX4-14 0.04645 0.00339 0.11726 0.00975 0.01831 0.00126 0.00849 21 166.39 112.6 8.86 117 7.95 117 7.95 -4JAXX4-15 0.05467 0.00359 0.13646 0.01051 0.0181 0.00124 0.00927 398.9 140.04 129.9 9.39 115.6 7.83 115.6 7.83 11JAXX4-16 0.05139 0.00299 0.14155 0.01008 0.01998 0.00136 0.00872 258.4 128.45 134.4 8.96 127.5 8.58 127.5 8.58 5JAXX4-17 0.05666 0.00647 0.14166 0.01686 0.01813 0.00131 0.01555 477.6 235.15 134.5 14.99 115.8 8.29 115.8 8.29 14JAXX4-18 0.05524 0.00408 0.13795 0.01157 0.01811 0.00125 0.01032 421.8 157.07 131.2 10.32 115.7 7.88 115.7 7.88 12JAXX4-19 0.07353 0.00781 0.20397 0.02264 0.02012 0.00146 0.02118 1028.5 201.14 188.5 19.09 128.4 9.25 128.4 9.25 32JAXX4-20 0.04887 0.00483 0.12029 0.01269 0.01785 0.00125 0.01144 141.8 216.64 115.3 11.5 114.1 7.95 114.1 7.95 1JAXX4-21 0.06054 0.00491 0.16682 0.01496 0.01999 0.00139 0.01357 622.9 165.88 156.7 13.02 127.6 8.79 127.6 8.79 19JAXX4-22 0.06167 0.00912 0.16901 0.0253 0.01988 0.00151 0.02379 662.7 288.64 158.6 21.98 126.9 9.55 126.9 9.55 20JAXX4-23 0.07579 0.01532 0.18982 0.0378 0.01816 0.00158 0.03622 1089.5 359.22 176.5 32.26 116 10.01 116 10.01 34JAXX4-24 0.06569 0.00432 0.16808 0.01294 0.01856 0.00127 0.01167 796.5 132.24 157.8 11.25 118.5 8.06 118.5 8.06 25JAXX4-25 0.07232 0.00724 0.18163 0.01925 0.01821 0.0013 0.01795 995 191.07 169.5 16.54 116.4 8.23 116.4 8.23 31JAXX4-26 0.04745 0.00582 0.12061 0.01535 0.01843 0.00133 0.01402 71.5 269.02 115.6 13.9 117.7 8.39 117.7 8.39 -2JAXX4-27 0.04713 0.00297 0.12001 0.00901 0.01847 0.00126 0.00775 55.6 144.34 115.1 8.17 118 7.96 118 7.96 -3JAXX4-28 0.04332 0.00241 0.11028 0.00764 0.01846 0.00125 0.00639 0.1 0 106.2 6.99 117.9 7.92 117.9 7.92 -11JAXX4-29 0.12877 0.02135 0.34662 0.0559 0.01952 0.00173 0.05417 2081.2 266.05 302.2 42.15 124.6 10.95 124.6 10.95 59JAXX4-30 0.0526 0.00236 0.33809 0.02076 0.04662 0.00314 0.01762 311.5 99.03 295.7 15.76 293.7 19.35 293.7 19.35 1JAXX4-31 0.0477 0.00223 0.12057 0.00587 0.01834 0.00053 0.00534 83.3 107.99 115.6 5.32 117.1 3.37 117.1 3.37 -1JAXX4-32 0.05009 0.00199 0.13572 0.00574 0.01965 0.00057 0.00517 199.1 89.93 129.2 5.13 125.5 3.59 125.5 3.59 3JAXX4-33 0.05001 0.00154 0.1162 0.00399 0.01685 0.00048 0.00351 195.3 69.87 111.6 3.63 107.7 3.02 107.7 3.02 3JAXX4-34 0.05498 0.00133 0.14882 0.00431 0.01963 0.00055 0.00376 411.3 52.51 140.9 3.81 125.3 3.47 125.3 3.47 11JAXX4-35 0.05098 0.00122 0.18374 0.00529 0.02614 0.00073 0.00456 239.7 54.36 171.3 4.54 166.4 4.59 166.4 4.59 3JAXX4-36 0.05085 0.00114 0.14949 0.00413 0.02132 0.00059 0.00354 234 51.03 141.5 3.65 136 3.75 136 3.75 4JAXX4-37 0.05418 0.00152 0.13972 0.00449 0.0187 0.00053 0.00396 378.2 61.86 132.8 4 119.5 3.33 119.5 3.33 10JAXX4-38 0.05824 0.00371 0.18372 0.01176 0.02288 0.00073 0.01103 538.1 134.33 171.3 10.09 145.8 4.58 145.8 4.58 15JAXX4-39 0.09765 0.00492 0.27058 0.01375 0.0201 0.00064 0.01311 1579.7 91.5 243.2 10.99 128.3 4.02 128.3 4.02 47JAXX4-40 0.05168 0.00176 0.13894 0.00518 0.0195 0.00056 0.00462 271.2 76.37 132.1 4.62 124.5 3.52 124.5 3.52 6JAXX4-41 0.04913 0.00122 0.14035 0.00414 0.02072 0.00058 0.00356 154.1 57.09 133.4 3.69 132.2 3.66 132.2 3.66 1JAXX4-42 0.04888 0.00149 0.12072 0.00412 0.01791 0.00051 0.00361 141.9 69.98 115.7 3.74 114.5 3.2 114.5 3.2 1JAXX4-43 0.05915 0.00351 0.15169 0.00907 0.0186 0.00058 0.00849 572.4 123.94 143.4 8 118.8 3.68 118.8 3.68 17JAXX4-44 0.05177 0.00165 0.16677 0.0059 0.02336 0.00066 0.00524 275.4 71.54 156.6 5.13 148.9 4.18 148.9 4.18 5JAXX4-45 0.04822 0.00171 0.12969 0.00498 0.01951 0.00056 0.00442 110 81.49 123.8 4.47 124.5 3.52 124.5 3.52 -1JAXX4-46 0.05884 0.00329 0.15231 0.00865 0.01877 0.00058 0.00807 561.2 117.5 143.9 7.62 119.9 3.65 119.9 3.65 17JAXX4-47 0.06772 0.00462 0.17791 0.01208 0.01906 0.00063 0.01145 859.9 135.42 166.3 10.41 121.7 3.96 121.7 3.96 27JAXX4-48 0.05397 0.00294 0.13044 0.00726 0.01753 0.00053 0.00673 369.7 117.92 124.5 6.52 112 3.37 112 3.37 10JAXX4-49 0.05087 0.00145 0.12229 0.00397 0.01744 0.00049 0.00348 234.9 64.45 117.1 3.59 111.4 3.11 111.4 3.11 5JAXX4-50 0.04924 0.00202 0.12446 0.0054 0.01833 0.00053 0.00487 159.3 93.11 119.1 4.87 117.1 3.35 117.1 3.35 2JAXX4-51 0.04815 0.00131 0.12027 0.00378 0.01812 0.00051 0.00327 106.4 63 115.3 3.42 115.7 3.22 115.7 3.22 0JAXX4-52 0.04928 0.00283 0.12401 0.00724 0.01825 0.00055 0.00669 161.4 128.93 118.7 6.54 116.6 3.51 116.6 3.51 2JAXX4-53 0.05119 0.00185 0.11983 0.00468 0.01698 0.00049 0.00419 249.2 81.13 114.9 4.24 108.5 3.09 108.5 3.09 6JAXX4-54 0.04817 0.00144 0.12521 0.00421 0.01885 0.00053 0.00368 107.6 69.01 119.8 3.8 120.4 3.37 120.4 3.37 -1JAXX4-55 0.04896 0.0014 0.14371 0.00467 0.02129 0.0006 0.00407 146 65.51 136.3 4.15 135.8 3.78 135.8 3.78 0JAXX4-56 0.09193 0.00356 0.24133 0.00982 0.01904 0.00057 0.00925 1465.8 72.01 219.5 8.03 121.6 3.58 121.6 3.58 45JAXX4-57 0.05525 0.00158 0.16684 0.00543 0.0219 0.00062 0.00481 422.1 62.17 156.7 4.73 139.7 3.9 139.7 3.9 11JAXX4-58 0.14025 0.00309 0.41307 0.01114 0.02136 0.0006 0.01054 2230.3 37.67 351.1 8 136.3 3.8 136.3 3.8 61JAXX4-59 0.05185 0.0021 0.13367 0.00573 0.0187 0.00054 0.00519 278.9 90.08 127.4 5.14 119.4 3.43 119.4 3.43 6JAXX4-60 0.06116 0.00346 0.16147 0.00925 0.01915 0.00059 0.00866 644.8 117.05 152 8.08 122.3 3.75 122.3 3.75 20

n=48


Isotope ratios


JAXX4

340

300

260

220

180

140

100

60

0.005

0.015

0.025

0.035

0.045

0.055

0.065

0.0 0.1 0.2 0.3 0.4

207Pb/235U

206 P

b/23

8 U




207Pb/235U 1σ206Pb/238U 1σ rho

207Pb/206Pb 1σ207Pb/235U 1σ

206Pb/238U 1σ age 1σ % discJAXX5-01 0.05054 0.02439 0.13705 0.06561 0.01967 0.00202 0.06359 219.8 846.89 130.4 58.59 125.6 12.77 125.6 12.77 4JAXX5-02 0.07447 0.02867 0.2325 0.08694 0.02265 0.0028 0.08414 1053.8 627.51 212.3 71.63 144.4 17.65 144.4 17.65 32JAXX5-03 0.15166 0.00776 0.45734 0.03003 0.02187 0.00153 0.0285 2364.7 84.84 382.4 20.92 139.5 9.67 139.5 9.67 64JAXX5-04 0.05629 0.00671 0.15211 0.01882 0.0196 0.00146 0.01736 463 245.3 143.8 16.58 125.1 9.22 125.1 9.22 13JAXX5-05 0.27192 0.01641 1.24747 0.08814 0.03328 0.00241 0.08573 3317.1 91.5 822.3 39.82 211 15.07 211 15.07 74JAXX5-06 0.0768 0.00528 0.23818 0.01894 0.0225 0.00159 0.01735 1116 131.47 216.9 15.53 143.4 10.04 143.4 10.04 34JAXX5-07 0.05542 0.00247 0.48335 0.02987 0.06327 0.00437 0.0255 428.8 96.54 400.4 20.45 395.5 26.49 395.5 26.49 1JAXX5-08 0.05326 0.01518 0.19531 0.05498 0.0266 0.00248 0.0525 340 541.94 181.2 46.71 169.2 15.55 169.2 15.55 7JAXX5-09 0.10494 0.01118 0.38798 0.04291 0.02682 0.00203 0.04088 1713.3 184.13 332.9 31.39 170.6 12.77 170.6 12.77 49JAXX5-10 0.07245 0.00774 0.22191 0.02487 0.02222 0.00164 0.02323 998.6 203.11 203.5 20.66 141.7 10.37 141.7 10.37 30JAXX5-11 0.06143 0.00436 0.65217 0.05326 0.07701 0.00544 0.04782 654.1 145.44 509.8 32.73 478.3 32.56 478.3 32.56 6JAXX5-12 0.04901 0.00588 0.15011 0.01875 0.02222 0.00164 0.01711 148.4 259.58 142 16.55 141.6 10.33 141.6 10.33 0JAXX5-13 0.06314 0.00831 0.19926 0.02682 0.02289 0.00175 0.02507 713 257.44 184.5 22.71 145.9 11.03 145.9 11.03 21JAXX5-14 0.061 0.00805 0.19328 0.0261 0.02298 0.00175 0.02435 639.1 261.05 179.4 22.21 146.5 11.04 146.5 11.04 18JAXX5-15 0.05165 0.00455 0.44971 0.04331 0.06316 0.00451 0.0388 269.8 189.54 377.1 30.33 394.8 27.37 394.8 27.37 -5JAXX5-16 0.13962 0.0265 0.4465 0.08136 0.0232 0.00227 0.07909 2222.5 296.41 374.8 57.11 147.8 14.28 147.8 14.28 61JAXX5-17 0.11769 0.03369 0.35817 0.09813 0.02208 0.00259 0.09554 1921.4 440.17 310.8 73.36 140.8 16.33 140.8 16.33 55JAXX5-18 0.05214 0.00382 0.13994 0.01171 0.01947 0.00137 0.01034 291.6 158.8 133 10.43 124.3 8.67 124.3 8.67 7JAXX5-19 0.05964 0.0024 0.65075 0.03831 0.07914 0.00545 0.03286 590.7 84.92 508.9 23.57 491 32.57 491 32.57 4JAXX5-20 0.06923 0.00273 1.42906 0.08346 0.14974 0.01031 0.07315 905.5 79.33 901.2 34.89 899.5 57.81 899.5 57.81 0JAXX5-21 0.04924 0.00574 0.18052 0.02198 0.02659 0.00195 0.02003 159.1 251.97 168.5 18.91 169.2 12.22 169.2 12.22 0JAXX5-22 0.04966 0.01769 0.15216 0.05343 0.02222 0.00227 0.05116 179.3 669.58 143.8 47.08 141.7 14.29 141.7 14.29 1JAXX5-23 0.06147 0.00985 0.18929 0.03057 0.02234 0.00176 0.02881 655.8 310.96 176 26.1 142.4 11.13 142.4 11.13 19JAXX5-24 0.09975 0.00393 3.87735 0.22628 0.28196 0.01942 0.20686 1619.4 71.66 1609 47.11 1601.2 97.65 1619.4 71.66 0JAXX5-25 0.10159 0.00428 3.81749 0.2292 0.27258 0.01883 0.21037 1653.3 76.07 1596.4 48.31 1553.9 95.37 1653.3 76.07 3JAXX5-26 0.06982 0.00308 1.20848 0.07417 0.12555 0.00867 0.0655 923.1 88.03 804.5 34.1 762.4 49.68 762.4 49.68 5JAXX5-27 0.16526 0.00651 10.41201 0.60729 0.45699 0.03148 0.57581 2510.2 64.76 2472.1 54.03 2426.3 139.29 2510.2 64.76 2JAXX5-28 0.06975 0.00436 0.21444 0.01603 0.0223 0.00156 0.01447 921 123.46 197.3 13.4 142.2 9.86 142.2 9.86 28JAXX5-29 0.06981 0.00661 0.21455 0.02173 0.02229 0.00163 0.0201 922.8 183.27 197.4 18.16 142.1 10.25 142.1 10.25 28JAXX5-31 0.054 0.00758 0.19875 0.02851 0.0267 0.00203 0.02648 371 288.72 184.1 24.15 169.8 12.72 169.8 12.72 8JAXX5-32 0.05123 0.00291 0.15697 0.01109 0.02223 0.00154 0.00955 251 125.57 148 9.73 141.7 9.74 141.7 9.74 4JAXX5-33 0.05595 0.00925 0.20775 0.03464 0.02693 0.00211 0.03253 449.9 330.67 191.7 29.12 171.3 13.26 171.3 13.26 11JAXX5-34 0.05043 0.00302 0.13489 0.00985 0.0194 0.00135 0.0085 214.7 133.2 128.5 8.82 123.9 8.55 123.9 8.55 4JAXX5-35 0.07286 0.0029 1.62757 0.09538 0.16203 0.01116 0.08422 1010.1 78.7 980.9 36.86 968.1 61.92 968.1 61.92 1JAXX5-36 0.05675 0.0125 0.17346 0.03785 0.02217 0.00193 0.03592 481 425.14 162.4 32.75 141.4 12.19 141.4 12.19 13JAXX5-37 0.07164 0.00198 0.18673 0.0058 0.0189 0.00052 0.00528 975.8 55.35 173.8 4.96 120.7 3.29 120.7 3.29 31JAXX5-38 0.05384 0.00139 0.15612 0.00464 0.02103 0.00057 0.00407 364.3 57.23 147.3 4.08 134.2 3.62 134.2 3.62 9JAXX5-39 0.05506 0.0011 0.20761 0.00521 0.02735 0.00074 0.00447 414.4 43.76 191.5 4.38 173.9 4.63 173.9 4.63 9JAXX5-40 0.09272 0.00497 0.26737 0.01428 0.02091 0.00066 0.01362 1482.1 98.37 240.6 11.44 133.4 4.14 133.4 4.14 45JAXX5-41 0.05708 0.00232 0.17914 0.00762 0.02276 0.00065 0.00697 494.1 87.82 167.3 6.56 145.1 4.08 145.1 4.08 13JAXX5-42 0.05968 0.00307 0.17696 0.00927 0.02151 0.00063 0.00864 591.8 107.67 165.4 8 137.2 3.98 137.2 3.98 17JAXX5-43 0.07535 0.00746 0.22581 0.02183 0.02173 0.00082 0.02101 1078 186.78 206.7 18.08 138.6 5.17 138.6 5.17 33JAXX5-44 0.08991 0.00148 1.85556 0.04188 0.14968 0.00402 0.03786 1423.5 31.12 1065.4 14.89 899.2 22.52 899.2 22.52 16JAXX5-45 0.15558 0.00581 2.38086 0.09124 0.11099 0.00336 0.08788 2408.1 62.14 1236.9 27.4 678.5 19.47 678.5 19.47 45JAXX5-46 0.15718 0.00814 0.73147 0.03699 0.03375 0.00112 0.03587 2425.5 85.24 557.4 21.69 214 6.97 214 6.97 62JAXX5-47 0.05561 0.00183 0.16332 0.00587 0.0213 0.00058 0.00529 436.6 71.58 153.6 5.12 135.9 3.69 135.9 3.69 12JAXX5-48 0.11702 0.00193 5.33129 0.12028 0.33042 0.00887 0.11141 1911.3 29.27 1873.9 19.29 1840.4 42.98 1911.3 29.27 2JAXX5-50 0.06049 0.00109 0.72968 0.01723 0.08749 0.00235 0.01488 621.2 38.28 556.4 10.12 540.7 13.94 540.7 13.94 3JAXX5-51 0.08858 0.00278 0.91318 0.03108 0.07477 0.0021 0.02898 1395.1 58.93 658.7 16.5 464.8 12.62 464.8 12.62 29JAXX5-52 0.05542 0.0015 0.15185 0.00465 0.01987 0.00054 0.00411 428.9 58.71 143.5 4.1 126.8 3.43 126.8 3.43 12JAXX5-53 0.16423 0.00266 9.45537 0.21168 0.41756 0.01121 0.20047 2499.7 27.03 2383.2 20.56 2249.4 50.96 2499.7 27.03 6JAXX5-54 0.05422 0.00135 0.1534 0.00444 0.02052 0.00056 0.00388 379.8 54.87 144.9 3.91 131 3.53 131 3.53 10JAXX5-55 0.07038 0.00594 0.23926 0.01981 0.02466 0.00087 0.01894 939.4 164.04 217.8 16.23 157 5.48 157 5.48 28JAXX5-56 0.05926 0.00106 0.61014 0.0144 0.07467 0.00201 0.01239 576.8 38.5 483.7 9.08 464.2 12.04 464.2 12.04 4JAXX5-57 0.06778 0.00142 0.7625 0.01967 0.08159 0.00221 0.01746 861.9 42.89 575.5 11.33 505.6 13.16 505.6 13.16 12JAXX5-58 0.05104 0.01051 0.19047 0.03843 0.02706 0.0014 0.03703 242.8 415.7 177 32.77 172.1 8.81 172.1 8.81 3JAXX5-59 0.04966 0.00428 0.14222 0.01213 0.02077 0.00069 0.01144 179.2 189.1 135 10.78 132.5 4.37 132.5 4.37 2JAXX5-60 0.09111 0.00174 0.51882 0.01263 0.0413 0.00112 0.01151 1448.9 35.88 424.4 8.45 260.9 6.9 260.9 6.9 39JAXX5-61 0.05026 0.00122 0.25804 0.00734 0.03723 0.00101 0.00633 207.2 55.28 233.1 5.92 235.7 6.28 235.7 6.28 -1JAXX5-62 0.0949 0.00155 2.43916 0.0549 0.18642 0.005 0.0499 1526 30.55 1254.2 16.21 1102 27.18 1526 30.55 12JAXX5-63 0.07979 0.00945 0.43071 0.04962 0.03915 0.00165 0.04797 1191.8 217.47 363.7 35.21 247.6 10.22 247.6 10.22 32JAXX5-64 0.05691 0.00119 0.32164 0.00829 0.04099 0.00111 0.00718 487.5 45.57 283.2 6.37 259 6.86 259 6.86 9JAXX5-65 0.05746 0.00105 0.60708 0.01447 0.07662 0.00206 0.01241 509 40.05 481.7 9.14 475.9 12.34 475.9 12.34 1JAXX5-66 0.0772 0.00279 0.08616 0.00329 0.00809 0.00023 0.00306 1126.3 70.39 83.9 3.07 52 1.47 52 1.47 38JAXX5-67 0.05409 0.00187 0.06442 0.00239 0.00864 0.00024 0.00215 374.5 75.85 63.4 2.28 55.4 1.54 55.4 1.54 13JAXX5-68 0.05196 0.00106 0.14368 0.00365 0.02006 0.00054 0.00311 283.6 45.85 136.3 3.24 128 3.42 128 3.42 6JAXX5-69 0.10148 0.00243 2.9235 0.08177 0.20894 0.00575 0.07602 1651.4 43.69 1388 21.16 1223.2 30.66 1651.4 43.69 12

n=51

• U decay constants and composition as follows: 238U = 9.8485 x 10-10, 235U = 1.55125 x 10-10, 238U/235U = 137.88• Analyses that are >30% discordant (by comparison of 206Pb/238U and 206Pb/207Pb ages) or >5% reverse discordant (in italics are not considered further)

Isotope ratios


JAXX5

2600

2200

1800

1400

1000

0.0

0.1

0.2

0.3

0.4

0.5

0 2 4 6 8 10 12 14

207Pb/235U

206 P

b/23

8 U


JAXX5

750

650

550

450

350

250

150

50

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.0 0.2 0.4 0.6 0.8 1.0

207Pb/235U

206 P

b/23

8 U


TJ2 volcaniclastic sandstoneAge estimates (ma)

Analysis_# 207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! rho 207Pb/206Pb 1! 207Pb/235U 1! 206Pb/238U 1! age 1! % discTJ2-29 0.05001 0.00381 0.06042 0.00524 0.00876 0.00061 0.00463 195.4 167.75 59.6 5.01 56.2 3.91 56.2 3.91 6TJ2-54 0.05104 0.00461 0.06453 0.00641 0.00917 0.00066 0.00575 242.7 195.68 63.5 6.11 58.8 4.22 58.8 4.22 7TJ2-38 0.0523 0.00308 0.06605 0.00486 0.00916 0.00064 0.00422 298.6 128.77 64.9 4.63 58.8 4.11 58.8 4.11 9TJ2-75 0.05244 0.00151 0.0638 0.00219 0.00882 0.00027 0.00192 304.7 64.2 62.8 2.09 56.6 1.74 56.6 1.74 10TJ2-24 0.05284 0.00319 0.06389 0.00472 0.00877 0.00061 0.00411 322 131.32 62.9 4.51 56.3 3.87 56.3 3.87 10TJ2-03 0.05293 0.00319 0.06534 0.00483 0.00895 0.00062 0.00421 325.9 131.1 64.3 4.6 57.5 3.95 57.5 3.95 11TJ2-20 0.05309 0.00311 0.06502 0.00472 0.00888 0.00061 0.00411 332.6 126.84 64 4.5 57 3.92 57 3.92 11TJ2-57 0.05406 0.00322 0.06915 0.00512 0.00928 0.00065 0.00447 373.4 128.3 67.9 4.86 59.5 4.16 59.5 4.16 12TJ2-56 0.05411 0.00308 0.06873 0.00495 0.00921 0.00065 0.0043 375.5 123.02 67.5 4.71 59.1 4.13 59.1 4.13 12TJ2-35 0.05394 0.00355 0.04269 0.00337 0.00574 0.00041 0.00296 368.6 141.48 42.4 3.28 36.9 2.6 36.9 2.6 13TJ2-17 0.05485 0.0032 0.07036 0.00509 0.0093 0.00064 0.00445 406.2 125.18 69 4.83 59.7 4.1 59.7 4.1 13TJ2-86 0.0561 0.00278 0.0691 0.00359 0.00893 0.00029 0.0033 456 106.82 67.8 3.41 57.3 1.86 57.3 1.86 15TJ2-34 0.05708 0.00335 0.07175 0.00526 0.00912 0.00064 0.00462 494.2 124.84 70.4 4.98 58.5 4.09 58.5 4.09 17TJ2-04 0.05977 0.00277 0.07456 0.00475 0.00905 0.00062 0.00413 595 97.79 73 4.48 58.1 3.96 58.1 3.96 20TJ2-85 0.06126 0.0019 0.0745 0.00268 0.00882 0.00027 0.00241 648.5 65.23 73 2.53 56.6 1.75 56.6 1.75 22TJ2-16 0.06157 0.0037 0.07629 0.00561 0.00899 0.00062 0.00499 659.3 123.74 74.6 5.3 57.7 3.97 57.7 3.97 23TJ2-92 0.0622 0.00189 0.08135 0.00288 0.00949 0.00029 0.00259 681 63.62 79.4 2.71 60.9 1.88 60.9 1.88 23TJ2-02 0.06243 0.00379 0.07673 0.00568 0.00891 0.00062 0.00506 688.8 124.35 75.1 5.36 57.2 3.94 57.2 3.94 24TJ2-25 0.06331 0.00284 0.07662 0.0048 0.00878 0.0006 0.0042 718.7 92.58 75 4.53 56.3 3.84 56.3 3.84 25TJ2-01 0.06352 0.00349 0.07544 0.00526 0.00861 0.00059 0.00467 725.7 112.49 73.8 4.97 55.3 3.79 55.3 3.79 25TJ2-62 0.06463 0.00223 0.0901 0.0035 0.01011 0.00032 0.00318 762.4 71.23 87.6 3.26 64.8 2.03 64.8 2.03 26TJ2-78 0.06482 0.00196 0.07721 0.00273 0.00864 0.00027 0.00246 768.4 62.49 75.5 2.57 55.5 1.72 55.5 1.72 26TJ2-13 0.06531 0.00329 0.08047 0.00535 0.00894 0.00061 0.00474 784.3 102.42 78.6 5.02 57.4 3.92 57.4 3.92 27TJ2-39 0.06601 0.00376 0.08297 0.00597 0.00912 0.00064 0.00533 806.6 114.94 80.9 5.6 58.5 4.09 58.5 4.09 28TJ2-27 0.06606 0.00777 0.07924 0.00968 0.0087 0.00064 0.00904 808.3 228.46 77.4 9.11 55.8 4.12 55.8 4.12 28TJ2-70 0.06673 0.00363 0.08236 0.00462 0.00895 0.0003 0.00432 829.3 109.6 80.4 4.33 57.4 1.92 57.4 1.92 29TJ2-05 0.06689 0.00371 0.08309 0.00582 0.00901 0.00062 0.0052 834.3 111.41 81 5.46 57.8 3.97 57.8 3.97 29TJ2-68 0.06733 0.00207 0.08215 0.00293 0.00885 0.00028 0.00265 848 62.62 80.2 2.75 56.8 1.76 56.8 1.76 29TJ2-31 0.06815 0.00422 0.08825 0.00668 0.00939 0.00066 0.00602 873 123.32 85.9 6.23 60.3 4.24 60.3 4.24 30TJ2-71 0.06961 0.00199 0.1085 0.00368 0.01131 0.00035 0.00333 916.8 57.68 104.6 3.37 72.5 2.24 72.5 2.24 31TJ2-61 0.07013 0.0033 0.09254 0.00457 0.00957 0.00031 0.00426 932.1 93.59 89.9 4.25 61.4 2 61.4 2 32TJ2-08 0.0709 0.00407 0.08652 0.00619 0.00885 0.00061 0.00558 954.5 113.22 84.3 5.78 56.8 3.91 56.8 3.91 33TJ2-81 0.07198 0.00224 0.10105 0.00364 0.01018 0.00032 0.00332 985.3 62.13 97.7 3.35 65.3 2.03 65.3 2.03 33TJ2-80 0.07377 0.00246 0.1034 0.00391 0.01017 0.00032 0.00359 1035.2 65.98 99.9 3.59 65.2 2.04 65.2 2.04 35TJ2-76 0.07486 0.0026 0.09831 0.00382 0.00953 0.0003 0.00352 1064.6 68.24 95.2 3.53 61.1 1.92 61.1 1.92 36TJ2-91 0.07633 0.00248 0.09088 0.00336 0.00864 0.00027 0.00309 1103.8 63.67 88.3 3.13 55.4 1.74 55.4 1.74 37TJ2-47 0.0784 0.00359 0.10225 0.00655 0.00946 0.00066 0.00589 1156.9 88.25 98.8 6.03 60.7 4.21 60.7 4.21 39TJ2-64 0.08038 0.00302 0.1005 0.00413 0.00907 0.00029 0.00384 1206.4 72.12 97.2 3.81 58.2 1.85 58.2 1.85 40TJ2-65 0.0807 0.0024 0.10191 0.00355 0.00916 0.00029 0.00326 1214.1 57.5 98.5 3.27 58.8 1.83 58.8 1.83 40TJ2-12 0.08271 0.00393 0.09659 0.00622 0.00847 0.00058 0.00564 1262.3 90.17 93.6 5.76 54.4 3.72 54.4 3.72 42TJ2-21 0.08451 0.00493 0.14332 0.01032 0.0123 0.00085 0.00947 1304.1 109.27 136 9.16 78.8 5.43 78.8 5.43 42TJ2-87 0.08473 0.0028 0.11547 0.00431 0.00988 0.00031 0.004 1309.4 62.85 111 3.92 63.4 1.99 63.4 1.99 43TJ2-89 0.08544 0.0048 0.11734 0.00672 0.00996 0.00034 0.00638 1325.5 105.14 112.7 6.1 63.9 2.19 63.9 2.19 43TJ2-49 0.08612 0.00743 0.11048 0.01047 0.0093 0.00068 0.00979 1340.9 158.21 106.4 9.57 59.7 4.34 59.7 4.34 44TJ2-32 0.08761 0.00516 0.11052 0.00808 0.00915 0.00065 0.00743 1374 109.13 106.4 7.39 58.7 4.13 58.7 4.13 45TJ2-06 0.0891 0.00965 0.10966 0.01238 0.00893 0.00067 0.01171 1406.2 194.4 105.7 11.3 57.3 4.26 57.3 4.26 46TJ2-55 0.094 0.00623 0.11526 0.00905 0.00889 0.00063 0.00842 1508.2 120.18 110.8 8.24 57.1 4.06 57.1 4.06 48TJ2-95 0.09725 0.00321 0.12758 0.00474 0.00952 0.0003 0.00444 1572 60.59 121.9 4.27 61 1.93 61 1.93 50TJ2-14 0.09935 0.00497 0.12026 0.00794 0.00878 0.0006 0.00734 1612 90.49 115.3 7.2 56.3 3.86 56.3 3.86 51TJ2-09 0.10013 0.00747 0.11976 0.01009 0.00867 0.00062 0.00947 1626.5 132.59 114.9 9.15 55.7 3.94 55.7 3.94 52TJ2-41 0.10347 0.00568 0.13079 0.00916 0.00917 0.00065 0.00851 1687.2 97.88 124.8 8.23 58.8 4.13 58.8 4.13 53TJ2-60 0.1039 0.00469 0.13172 0.00837 0.0092 0.00064 0.00773 1694.9 80.89 125.6 7.51 59 4.1 59 4.1 53TJ2-22 0.10449 0.00816 0.13315 0.01158 0.00924 0.00066 0.01092 1705.3 137.24 126.9 10.4 59.3 4.23 59.3 4.23 53TJ2-69 0.10671 0.00339 0.15278 0.00552 0.01038 0.00033 0.00519 1744 57.03 144.4 4.86 66.6 2.1 66.6 2.1 54TJ2-83 0.10701 0.00387 0.12107 0.00479 0.00821 0.00026 0.00453 1749.2 64.78 116 4.34 52.7 1.69 52.7 1.69 55TJ2-63 0.11521 0.00294 0.17245 0.00541 0.01086 0.00034 0.00507 1883.2 45.25 161.5 4.68 69.6 2.15 69.6 2.15 57TJ2-74 0.11549 0.00444 0.14062 0.00581 0.00883 0.00029 0.00552 1887.6 67.58 133.6 5.17 56.7 1.85 56.7 1.85 58TJ2-42 0.11834 0.01203 0.14689 0.01564 0.009 0.00069 0.01495 1931.3 171.61 139.2 13.9 57.8 4.41 57.8 4.41 58TJ2-18 0.11806 0.00561 0.14209 0.00912 0.00873 0.0006 0.00852 1927.1 82.76 134.9 8.11 56 3.84 56 3.84 58TJ2-11 0.11929 0.00624 0.14989 0.0101 0.00911 0.00063 0.00947 1945.7 90.69 141.8 8.92 58.5 4.03 58.5 4.03 59TJ2-28 0.12037 0.00606 0.14824 0.00979 0.00893 0.00062 0.00917 1961.7 87.23 140.4 8.66 57.3 3.94 57.3 3.94 59TJ2-100 0.12306 0.00365 0.18136 0.00622 0.01069 0.00034 0.00588 2001 51.69 169.2 5.35 68.5 2.16 68.5 2.16 60TJ2-58 0.12255 0.01178 0.16308 0.0166 0.00965 0.00073 0.01587 1993.6 161.69 153.4 14.5 61.9 4.68 61.9 4.68 60TJ2-43 0.1249 0.00787 0.15557 0.01177 0.00903 0.00065 0.01112 2027.4 107.55 146.8 10.3 58 4.13 58 4.13 60TJ2-101 0.13943 0.00444 0.20575 0.00738 0.0107 0.00034 0.00704 2220.2 54.17 190 6.22 68.6 2.19 68.6 2.19 64TJ2-77 0.14075 0.00442 0.19995 0.0071 0.0103 0.00033 0.00677 2236.5 53.28 185.1 6.01 66.1 2.11 66.1 2.11 64TJ2-84 0.14485 0.00603 0.21736 0.00946 0.01088 0.00037 0.00909 2286 69.91 199.7 7.89 69.8 2.34 69.8 2.34 65TJ2-67 0.16119 0.0038 0.25685 0.00765 0.01156 0.00036 0.00729 2468.2 39.26 232.1 6.18 74.1 2.29 74.1 2.29 68TJ2-73 0.16192 0.0078 0.23826 0.0116 0.01067 0.00038 0.01122 2475.8 79.07 217 9.51 68.4 2.41 68.4 2.41 68TJ2-46 0.16652 0.00822 0.28273 0.01865 0.01231 0.00087 0.01778 2523 80.61 252.8 14.8 78.9 5.52 78.9 5.52 69TJ2-26 0.16391 0.01471 0.20359 0.01932 0.00901 0.00068 0.01864 2496.4 143.75 188.2 16.3 57.8 4.33 57.8 4.33 69TJ2-23 0.17304 0.01339 0.29916 0.02541 0.01254 0.00092 0.02449 2587.3 123.61 265.7 19.9 80.3 5.85 80.3 5.85 70TJ2-10 0.17401 0.00835 0.27445 0.01765 0.01144 0.00079 0.01686 2596.6 77.88 246.2 14.1 73.3 5.03 73.3 5.03 70TJ2-07 0.17559 0.01182 0.28538 0.02208 0.01179 0.00085 0.02123 2611.7 107.89 254.9 17.5 75.5 5.38 75.5 5.38 70TJ2-19 0.17072 0.00822 0.21091 0.01358 0.00896 0.00062 0.01296 2564.7 78.36 194.3 11.4 57.5 3.95 57.5 3.95 70TJ2-59 0.18633 0.00931 0.31805 0.02108 0.01238 0.00087 0.02021 2710 80.16 280.4 16.2 79.3 5.56 79.3 5.56 72TJ2-33 0.20789 0.00879 0.34624 0.02135 0.01208 0.00084 0.02051 2889.2 67.05 301.9 16.1 77.4 5.36 77.4 5.36 74TJ2-30 0.20994 0.0093 0.34371 0.0213 0.01187 0.00082 0.02048 2905 70.07 300 16.1 76.1 5.2 76.1 5.2 75TJ2-82 0.21121 0.00433 0.327 0.00907 0.01123 0.00035 0.00872 2914.8 32.83 287.3 6.94 72 2.21 72 2.21 75TJ2-36 0.21426 0.02406 0.36244 0.04054 0.01227 0.00103 0.03951 2938.1 170.77 314 30.2 78.6 6.54 78.6 6.54 75TJ2-98 0.21594 0.00571 0.33767 0.01062 0.01134 0.00036 0.01026 2950.7 42.03 295.4 8.06 72.7 2.3 72.7 2.3 75TJ2-40 0.2209 0.00994 0.36345 0.02295 0.01193 0.00084 0.02211 2987.3 70.6 314.8 17.1 76.5 5.32 76.5 5.32 76TJ2-52 0.22356 0.01049 0.39381 0.0253 0.01278 0.0009 0.0244 3006.5 73.42 337.2 18.4 81.8 5.72 81.8 5.72 76TJ2-53 0.2242 0.00999 0.3861 0.02429 0.01249 0.00087 0.02342 3011.1 69.82 331.5 17.8 80 5.57 80 5.57 76TJ2-51 0.22628 0.01028 0.3827 0.02426 0.01227 0.00086 0.0234 3025.9 71.03 329 17.8 78.6 5.48 78.6 5.48 76TJ2-79 0.70522 0.0121 8.30804 0.21413 0.08545 0.00261 0.21152 4741.4 24.43 2265.2 23.4 528.5 15.5 529 15.5 77TJ2-45 0.2358 0.01193 0.38707 0.02569 0.01191 0.00084 0.02485 3091.9 78.45 332.2 18.8 76.3 5.38 76.3 5.38 77TJ2-37 0.23976 0.01103 0.39577 0.02521 0.01197 0.00084 0.02437 3118.4 71.41 338.6 18.3 76.7 5.36 76.7 5.36 77TJ2-44 0.24639 0.01399 0.42242 0.02963 0.01243 0.0009 0.02873 3161.7 87.31 357.8 21.2 79.7 5.7 79.7 5.7 78TJ2-72 0.28153 0.00737 0.63127 0.01956 0.01626 0.00052 0.01904 3371.5 40.25 496.9 12.2 104 3.31 104 3.31 79TJ2-90 0.28286 0.02915 0.64301 0.05929 0.01649 0.00097 0.05832 3378.8 152.09 504.2 36.6 105.4 6.16 105 6.16 79TJ2-94 0.28099 0.00657 0.51099 0.01495 0.01319 0.00042 0.01453 3368.4 36.02 419.1 10.1 84.5 2.64 84.5 2.64 80TJ2-97 0.30331 0.00705 0.61003 0.01775 0.01459 0.00046 0.01729 3487.2 35.49 483.6 11.2 93.4 2.92 93.4 2.92 81TJ2-93 0.32671 0.0065 0.78533 0.02136 0.01743 0.00054 0.02082 3601.7 30.21 588.5 12.2 111.4 3.42 111 3.42 81TJ2-15 0.30826 0.01972 0.57644 0.04236 0.01356 0.00099 0.04137 3512.2 95.45 462.2 27.3 86.8 6.28 86.8 6.28 81TJ2-66 0.32942 0.01048 0.65788 0.02262 0.01449 0.00049 0.02213 3614.4 47.95 513.3 13.9 92.7 3.1 92.7 3.1 82TJ2-99 0.36124 0.00735 0.77664 0.02126 0.01559 0.00048 0.02078 3755.1 30.54 583.6 12.2 99.7 3.07 99.7 3.07 83TJ2-96 0.60212 0.01116 3.25964 0.08583 0.03926 0.00121 0.08462 4513.1 26.65 1471.5 20.5 248.3 7.51 248 7.51 83TJ2-48 0.3549 0.01717 0.66339 0.0429 0.01356 0.00096 0.04194 3728.2 71.71 516.7 26.2 86.8 6.12 86.8 6.12 83TJ2-50 0.40909 0.02187 0.91377 0.0614 0.0162 0.00117 0.06023 3942.8 77.96 659.1 32.6 103.6 7.43 104 7.43 84TJ2-88 0.43909 0.00898 1.16562 0.03186 0.01925 0.0006 0.03126 4048.6 30.14 784.6 14.9 122.9 3.8 123 3.8 84

n=29


Isotope ratios


TJ2

90

70

50

30

10

0.000

0.004

0.008

0.012

0.016

0.00 0.02 0.04 0.06 0.08 0.10

207Pb/235U

206 P

b/23

8 U


Aitchison et al 2011 GR YTSZ dz data

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Transcript of Aitchison et al 2011 GR YTSZ dz data