9780813754703_backmatter.pdf - GeoScienceWorld

Index [Italic page numbers indicate major references]

Acacia farnesiana, 109 greggy, 109

acanthite, 325, 391, 392, 412 Acatán Formation, 145, 343, 344, 346 Acatlán Schists, 144, 145 Acatlán uplift, 142 acid

carbonic, 320 phosphoric, 165

actinolite, 245, 254 Acuña-Laredo subbasin, 128 Adjunta Basin, 110, 114 Adjunta subbasin, 136, 137

southeast, 137 adularía, 225, 411, 412 Agave lechuguilla, 109 agglomerates, 94, 147, 195, 247, 296,

298, 370, 385 aggregates, 137, 236 Agripo vein, 291 Agua Caliente, 100, 101 Agua Fría Camp, 71 Agua Fría fault, 64, 65, 67, 68 Agua Fría rhyolite flows, 63 Agua Nueva Formation, 80 Agua Prieto township, 149 Aguas del Fresnillo, 383 aguilarite, 284, 412 Aguja Formation, 157 Ahualulco-Rio Salado-Ameca aquifer,

99 Ahuatlán deposit, 159 Ahuichila Formation, 269 Alacrán chimney, 294 Alacrán orebody, 294 alaskite, 261, 272 albite, 223, 225, 261 allanite, 349 Allende sector, 142, 147 alluvial deposits, 20, 27, 136 alluvium, 21, 63, 115, 136, 149, 151,

152, 157, 164, 269, 339, 387, 397

Almagres dome, 419 Almoloya de Las Granadas area, 377 Alpha aquifer, 30 Alseseca Andesite, 80, 84 Alseseca Andesite volcanic unit, 80 alteration, 72, 84, 90, 91, 180, 199,

201,375,409 argillic, 409 hydro thermal, 223, 299, 390, 411 phyllic, 409 potassic, 199, 201, 202, 411 propylitic, 411 quartz-sericite, 366 sericite, 202 supergene, 200, 202

Alto Lerma basin, 66 Altotonga, 77 aluminum, 127, 264 Amarillas vein, 387

amethyst quartz, 225 Amexquite Norte dome, 415 Amexquite Norte well, 420, 422, 423 ammonia, 32 ammonites, 144, 229, 280, 283 amphiboles, 65, 84 amphibolite, 339, 341, 373 andesites, 15, 16, 20, 24, 62, 63, 73,

80, 83, 84, 104, 170, 195, 197, 199, 210, 244, 267, 288, 324, 328, 339, 353, 365, 373, 406

dikes, 201, 296 flows, 83, 219, 272, 296 hypersthene, 407 microlitic, 63 phenocrysts, 272 porphyry, 254 sequence, 218 series, 19 tuffs, 335, 407

andradite, 245, 299 anglesite, 257, 268, 400 anhydrite, 186, 263, 416, 421, 422 anomalies

geophysical, 16 Guadalupe Victoria, 16 resistivity, 67 Riito, 16 thermal, 16 thermometry, 100

antimony, 284, 285, 329, 376, 412 antimony oxide, 329 apatite, 315, 349, 352 aplite, 339

dikes, 218 Aporo region, 59 aquifers, 5, 30, 51, 61, 99, 115, 121,

128, 167,170 high-temperature, 27 thermal, 17

aragonite, 346, 371 Arana fault, 219, 223 Arana vein, 225 Arañas sector, 349 Araró area, 115 Araró geothermal zone, 16 Arbustus variant, 369 Archaeodictyomira sp., 385 Arenas fault, 84 argentite, 214, 225, 284, 301, 325,

328, 390, 412 argentite-acanthite, 412 argillites, 27, 399 argillization, 299 Arnioceras, 315 Arroyo Canelo, 187 Arroyo Chilitos, 385, 386 Arroyo Colorado, 99 Arroyo El Campamento, 184, 187 Arroyo El Pino, 327 Arroyo El Sauz, 134 Arroyo Guadalupe, 187 Arroyo Hondo, 98

Arroyo Ixtahuantante, 99 Arroyo La Colorado, 137 Arroyo La Danta, 327 Arroyo La Herradura, 231 Arroyo Las Pocitas, 189 Arroyo Prieto dome, 419 Arroyo Puerto Chino, 210 Arroyo Real del Viejo, 151 Arroyo San Miguel, 187 Arroyo San Milano, 184, 187, 189 Arroyo Tizapa, 374 arsenic, 376, 412 arsenopyrite, 214, 236, 245, 247,

263, 274, 294, 299, 302, 380, 390, 392, 400, 412

asbestos, 240, 331, 343, 347 ash, volcanic, 63, 189, 190 ashfall, 181, 184 Atlantic rift, 319 augite, 301, 407 Aulacomyella, 318 Aurora Formation, 131, 137, 151,

170, 241, 253,260, 269,272 Austin Formation, 110, 132 axinite, 390 Ayotusco Unite, 370 Azules Navacoyán manto, 263 azurite, 268, 328, 392 Bahía Magdalena block, 181 Bahía Vizcaíno block, 181 Baja California, 23

geothermal province, 20 Baja California Norte, mines, 177 Baja California Peninsula

Metallogenic Province, 177 Baja California Sierras Province, 23 Baja California Sur, 165,179,195

mines, 177 Balsas basin, 3, 62 Balsas Group, 59 Balsas-Mezcala basin, 380 Balsas River, 3 Baluarte anticline, 137 Baños Eréndira, 63 barite, 147, 218, 240, 333, 335, 336,

359 Barranca Basin, 147

coal deposits, 149 stratigraphy, 147

Barranca Formation, 147, 148, 149, 210

Barrancas Subprovince, 218 Barril Viejo Formation, 131 Barrio Séptimo Gorge, 145, 147 basalts, 20, 63, 73, 170, 374, 385,

406 flows, 133, 195, 365, 373 olivine, 83, 195 overflows, 148

Basin and Range Province, 155, 241, 259

batholiths, acid, 150

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426 Index

Baucarit Formation, 147, 148, 210 bauxite deposits, 331 Beleña Shaft, 383 Benevides Formation, 261 bentonite, 240 betafite, 349 bicarbonates, 32 Bigford Formation, 141 Bigford Pico Clay, 142 bioclasts, 260 biotite, 201, 231, 301, 315, 358, 386 birnessite, 320 Bisbee Group, 150 bismuth, 412 Blancuzco, 189 boiling, 36 Bolañitos-Melladito, 408 Bolañitos Mine, 413, 404 Bolañitos orebody, 408 Bolañitos vein, 408 boleite, 196 Boleo Formation, 195 boisons, 151 Bolsón de Mapimi, 159 bone fragments, vertebrate, 186 bones, 135 bornite, 196, 199, 236, 301, 328, 361 boron, 32, 87, 284 borosilicates, 285 boulangerite, 301 Bravo Basin, zones, 109 Brawley/Imperial fault, 28 breccias, 80, 95, 98, 195, 199, 223,

297, 302, 339, 386 A/B, 368 flows, 195, 407 hydrothermal, 199 injection, 367 quartz, 210, 214 tourmaline, 199 volcanic, 385, 386 volcanoclastic, 358

Brisa Mar fan, 339 brucite, 346, 347 Buda Formation, 254, 261 Buena Tierra Mine, 241, 244 Buenavista deposits, 161, 162, 164 Bufa Formation, 406 Burgos Basin, 139, 162 Burro Range, 110 bustamite, 225 Bustillos fault, 244

C. Villa Pánuco, 159 Caballeros Creek, 114 Cabullona Basin, 149, 151

coal deposits, 151 physiography, 149 stratigraphy, 150

Cabullona Group, 150 Cacao dome, 419 cadmium, 265, 373, 376 Cahuasas Formation, 80, 315, 318 calcarenite, 260, 318, 320 calcilutite, 406 calcite, 65, 73, 84, 104, 196, 201,

218, 223, 225, 229, 236, 245, 247, 254, 261, 263, 272, 274, 285, 299, 309, 320, 335, 341,

347, 371, 380, 385, 387, 390, 397, 400, 408, 411

calcsilicates, 200 Calderones dike, 407 Calderones Formation, 407 caliche, 115, 127, 136, 229, 384 California Batholith, 27 Campeche Bay area, 416 Campo Morado, Guerrero, 353, 377 canal irrigation, 172 Cananea, Sonora, 197, 199 Cananea-Duluth chimney, 199 Cantil de La Vuelta, 186 cantiles, 179 Canutillo mine, 201 Cañada Muñiz fault, 10 Cañón de Chipoco, 315 Cañón de Las Flores, 98 Cañón de Tezintla, 315, 318 Cañón de Tlaltepingo, 315 Cañón del Novillo, 239 Cañón Peregrina, 315 cap rock, 420, 421,422 Capote Basin, 200 Capsa-Regenerador deposit, 371 Capsa-Regenerador Mine, 370 Caracol Formation, 229, 397 Carbon II Project, 129 carbonates, 196, 241, 245, 335, 345,

346 carbonatization, 371 Carbón I Project, 120,129 Carbón II Project, 119 Carmen Member, 218 Carmen-Pinguico, 408 carnotite veins, 161 Carrizal, Hidalgo, 295, 296, 313

deposits, 305, 309 Carrizo Formation, 140 Casidulus sp., 114 cassiterite, 245, 247 Castaños subbasin, 131, 138 Cata Mine, 403 Carillas, 387 Cebada Mine, 405, 412, 413 Cebada orebody, 408 Cedral vein, 225 Cedros dike, 407 Cedros Formation, 407 cement, 127 cementation, 43

calcareous, 136 Cenozoic, 148,210,318 Central block, 302 Central fault, 301 Central Mesa geothermal province, 20 Central Mesa metallogenic province,

229, 381 Central Mesa physiographic province,

279, 296 cerargyrite, 257, 387 Cerritos Colorados graben, 104 Cerritos Colorados-La Azufrera area,

16, 100 Cerro Alto dome, 98 Cerro Blancuzco, 189 Cerro de La Gloria, 229, 231, 237

halo zones, 232 Cerro de La Isleta, 146

Cerro El Chapulín dome, 98 Cerro El Culebreado area, 100 Cerro El Culebreado dome, 98 Cerro El Gallo dome, 99 Cetro El Gavilán, 187 Cerro El Pedernal flow, 99 Cerro El Salto, 147 Cerro El Tule dome, 98, 99 Cerro Ixtahuantante dome, 98 Cerro La Encantada, 23 Cerro La Guásima, 147 Cerro La Yerbabuena, 63 Cerro Las Planillas area, 98, 99 Cerro Palo Verde, 184,189 Cerro Prieto, 15, 38, 39, 41, 48, 53

A/B contact, 45 aquifer, 32 drilling, 42 fault, 36, 41 geochemistry, 32 geothermal field, 23, 27, 44, 51 geothermal gases, 33 geothermal reservoir, 30 reservoir water, 32 shale density, 45 temperatures, 44 volcano, 23, 24

Cerro Prieto-Michoacán fault, 36 Cerro Proaño, 383, 384, 385, 386,

390 Cerro San Miguel, 99, 397 Cerrode del Caracol, 357 Cerrode El Cantón, 356 Cerros Santa Clara, 339 cerussite, 255, 257, 268, 371, 400 CFE. See Federal Commission of

Electricity chalcedony, 196, 371, 386 Chalco, 159 chalcocite, 196, 200, 202, 328 chalcopyrite, 196, 199, 200, 201,

214, 218, 225, 231, 236, 245, 247 261, 263, 268, 274, 294, 301, 302, 309, 310, 328, 335, 358, 360, 361, 363, 375, 380, 390, 391, 392, 412

Charcas anticline, 397 Charcas mining district, 261, 279,

283, 285 mine production, 285 ore reserves, 285, 286

chert, 229, 253, 254, 260, 269, 279, 280, 283, 291, 296, 299, 336, 386

Chiapas, 9, 20, 167, 327, 331 Chiapas Grijalva, 10 Chiapas Sierra Madre, 10 Chichíndaro dike, 407 Chichíndaro Formation, 407 Chicoasén hydroelectric project, 10 Chicoasén-Malpaso fault, 10 Chicoasén reservoir, 9,10 Chicontepec, 159 Chignautla, 79 Chihuahua, 134, 151,155, 159, 162,

252, 259, 261, 267 Chihuahua bolson, 170 Chihuahua Range, 240 Chilitos Formation, 385, 387, 391


Index 421

chimneys, 241, 245, 251,256, 262, 263, 310, 366, 375, 387, 390

brecciated, 367 deposits, 263 massive sulfide, 263 sulfide-silicate, 263

Chinameca dome, 417, 419 Chipoco Formation, 318, 320 Chipoco Village, 318 Chivos de Abajo orebody, 358 Chivos de Arriba orebody, 358 chlorine, 196 chlorite, 65, 73, 104, 201, 223, 225,

299, 309, 342, 357, 358, 375, 390, 411, 412

chlorite schist, 145 Chorro chimney, 251 Chorro fault, 244 chromium, 177 chrysocolla, 202, 328 chrysotile, 345

slip, 331 Cidaris Limestone Formation, 144,

145 Cinco Señores vein, 225 cinder cones, 96 Cintura Formation, 150, 151 Citlaltépetl, 78 Ciudad Hidalgo, 59 Claiborne Group, 140, 141 clastics, 148, 167, 279, 380

processes, 184, 190, 191 clay minerals, 65, 104, 329 clays, 27, 73, 84, 133, 135, 136, 137,

139, 140, 141, 146, 152, 155, 272, 320, 335, 342, 361, 411

kaolinitic, 114 climate, 109, 131, 180 Clostridium nigrificans, 421 Coahuila, 4, 107, 129, 131,139, 253 Coahuila Basin, 129 Coahuila Basin and Range province,

131 Coahuila bolson, 170 Coahuila Coal District, 131 Coahuila Geoanticline, 137 Coahuila Island, 131, 137, 279 Coahuila Peninsula, 115, 397 Coahuilites, 134 coal, 4,107, 112, 149,159

ash, 124 beds, 141, 148, 149 bituminous, 138, 151 carbon content, 152 deposits, 4, 131, 132, 136,142,

146,149,151,157,159 development, 107, 129 dirty, 155 exploration, 127 potential, 160 reserves, 120,129,138,142,147,

149,151,152,157 resources, 152 seams, 4, 110, 114, 120, 133, 134,

136, 138, 141, 142, 146,148, 150, 151, 155, 157

subbasins, 131 subbituminous, 159 thermal, 107

vitrinitic, 152, 157 zone, 136

Coalcomán, Michoacán, 333 coalluvium, 343, 346 cobalt, 196 Cofre de Perote, 77, 78, 80 coke mixtures, 125 colloform, 386 Colombia Basin, 129 Colombia-San Ignacio Basin, 139

coal deposits, 142 sedimentation, 140 stratigraphy, 140

Coloradita Mine, 358 Coloradita orebody, 358 Colorado River sediments, 23, 36 Combinación vein, 283 combustion, 124, 127 Comondú Formation, 24, 179, 180,

195 Compaftia Fresnillo, 265 compression, 137 Concepción del Oro district, 261, 383 Concepción Pápalo, Oaxaca, 343, 344

asbestos deposits, 331 Concordia area, 301 Concordia dike, 299 Concordia fault, 299, 301 Concordia mine, 295 conglomerates, 4, 20, 80, 86, 110,

127, 133, 136, 147, 150 164, 170, 186, 189, 195, 210, 229, 244, 267, 269, 279, 296, 315, 318, 339, 344, 380, 386, 406

Consejo de Recursos Minerales, 161 Consuelo Group, 144 Continental Aguja, 157 convergence, 137 copper, 177, 225, 236, 240, 252, 265,

268, 274, 285, 299, 304, 309, 328, 331, 335, 353, 356, 358, 363, 366, 368, 373, 375, 377, 390, 397, 400, 412

blister, 196 deposits, 195, 197, 199,201, 354 native, 196 reserves, 196, 327, 328, 399

Copper King, Guerrero, 353 copper oxichlorides, 196 corals, 280, 406 cordierite, 345, 346 Corralitos, 159 covellite, 196, 361 Cretaceous, 131,133,148, 210, 241,

357, 385 cristobalite, 359 crustaceans, 114 cryptomelane, 196, 320, 387 crystals

euhedral, 236 feldspar, 358 pyrite, 223, 318 quartz, 63 sphalerite, 375

Cualac Conglomerate, 144, 145 Cualac Quartzite, 145 Cuale District

deposits, 355, 363 stratigraphy, 357

Cuatro Ciénagas, 136 Cucapá Sierra, 24 Cuchillo Formation, 241, 248

evaporite sequence, 260 Cuenca del Bravo, 109 Cuencamé, Durango, 269 Cuerpo Colonia ore body, 289 Cuesta del Cura Formation, 229, 236,

253, 269, 272, 279, 283, 397 Cueva de Las Espadas, 261 Cueva Santa Branch vein, 387, 391,

392 Cuicatlán, Oaxaca, 343 Cuicatlán Group, 344 Cuitzeo Lake, 61 Cuitzeo Lake basin, 66 Culebra vein, 225 cumengite, 196 Cupido Formation, 115, 253, 279, 283 Cupido reef complex, 131 cuprodescloizite, 284 currents

marine, 190 submarine, 184

dacites, 24, 62, 80, 170, 324 flows, 296 San Andrés, 63

dams, 172 deformation, 137, 149, 269, 373 Del Rio Formation, 253, 254, 261 Delicias area, 131 Delta fault, 28, 41 deposition, 140, 180, 181 deposits

alluvial, 20, 27 antimony, 285, 329 asbestos, 343, 347 borite, 333 Buenavista, 161, 162, 164 Campo Morado, 377 Cananea, 197 Capsa-Regenerador, 371 chimney, 263 clastic, 148 coal, 4, 131, 132, 136,142,146,

149,151,157,159 copper, 195, 197, 199, 201, 354 Cuale District, 355, 363 El Chapóte, 161, 162 epigenetic ore, 381 Florida-Barrigón, 197 fluorite, 388 flysch, 344 Fresnillo Cerro Proaño, 397 geothermal, 11 gold, 219, 284 graphite, 331 hydro thermal, 161 ilmenite, 349, 351 iron, 339 La Aurora, 283 La Colorado, 199 La Coma, 162, 164 La Encantada, 257 La Minita, 335 lacustrine, 133 Las Bibianas, 283 Las Lupes, 283


428 Index

Las Margaritas, 162 Los Amóles, 164 manganese, 318 manganese dioxide, 320 massive sulfide, 375, 376 mineral, 195, 205, 403 nonmetallic, 195 Nopal I, 162 opal, 354 ore, 355 peat, 119, 120, 159 Peñoles, 162 polymetallic, 240, 331, 353, 381 Puerto m, 162 pumice, 85 Real de Angeles, 395 Rey de Plata, 377 Río Escondido, 4 Santa Rosa, 377 silver, 219 skarn, 210 sulfur, 415 Taxco, 331 Tecomatlán, 159 Tejaluca, 159 titanium, 349 Tizapa, 377 Tlapa, 159 Trancas, 162 uranium, 161 zinc, 284

Descubridora fault, 261 Deseada, 387 Desulfovibrio

desulfuricans, 421 orient is, 421

detritus, 115, 180, 219, 339 dewatering, 135 diabase, 347, 380

dikes, 218, 344 diaphorite, 284 diatomite, 184, 189, 194 diatoms, 190 dikelets, 155 dikes, 80, 151, 155, 199, 244, 245,

272, 291, 313 aplitic, 218, 376 felsite, 261 latite, 301 monzonite, 298 rhyolite, 245, 267, 283, 324, 385

dinoflagellates, 190 dinosaur bones, 155 diopside, 254, 309, 347 diorite, 201, 254, 275, 291, 327, 339,

341, 380 hypabyssal, 385

diorite-diabase, 244 Doctor Formation, 65, 68, 289, 291,

305 dolerites, 79, 385 dolomite, 146, 253, 299, 380, 412 Dolores-Chiquihuites area, 301 domes, 98

dacitic, 78 lava, 98 rhyolite, 80 Río Salado, 98 salt, 417

Domico de Los Peyotes anticline, 137 drill holes, 127 drilling

development, 71,101 exploratory, 42,71, 164

druses, 386 Durango, 159, 164, 215, 219, 240,

261, 269, 381 D urania austinensis, 110 Eagle Ford Formation, 110, 115, 132,

151 Eagle Pass, Texas, 107, 110, 135 earthquake swarm, 36 East Field, 241, 244, 245, 252 East Field Potosi Vein, 251 East Mesa geothermal field, 41 East Pacific Rise, 24 Echiva cactus, 109 Edwards Formation, 260 El Abra Limestone, 170 El Alacran orebody, 291 El Aquajito Ranch, 186, 190 El Arco mine, 177 El Boleo copper mine, 177, 195 El Bordón, 339, 342 El Campamento, 339 El Capote chimney, 199 El Ceboruco complex, 96 El Cedro mineworks, 403 El Chapóte deposit, 161, 162 El Chiflador, 65 El Chino fault, 65, 67, 68 El Chino Module, 72 El Cobre body, 269 El Cobre vein, 380 El Conejo, 408 El Cristo, 134 El Cristo Mine, 159 El Cuatro orebody, 289 El Cubo Mine, 403, 407, 408 El Currutaco, 65, 68 El Doctor Limestone, 170, 296 El Encino area, 149, 10, 151 El Fenomeno mine, 177 El Gavilan subbasin, 137 El Infiernillo, 3 El Mango, 339 El Mayor Sierras, 24 El Membrillo vein, 285 El Mezquite mine, 164 El Monte, Hidalgo, 295, 299

deposit, 301 El Monte Mine, 299, 403

production, 304 El Morro, 397 El Morro fanglomerate, 296, 298 El Nayal, 408 El Nopal, 408 El Nopal mine, 152 El Oro-Tlalpujahua region, 59 El Pico Clay Formation, 141 El Pilar vein, 387 El Piñón anticlinorium, 298, 309 El Plomo area, 257 El Portillo, 328 El Realito Mine, 288

geology, 287 mineralization, 287

orebody, 289 El Refugio area, 257 El Refugio mine, 237, 288 El Refugio vein, 387 El Reliz area, 358 El Rey orebody, 283, 285 El Socorro chimney, 256 El Temeroso, 284 El Temeroso intrusive, 283, 285 El Temeroso stock, 283 El Tigre mine, 177 El Triunfo mine, 177 El Tubo, 339 El Vampiro fault, 63 El Viejón fault, 63 El Volcán, 339 El Volcancito, 339 electricity, 3 electrum, 225, 412 Encrucijada dome, 419 energy

geothermal, 3,11 nuclear, 4,161 resources, 1

Eocallista, 145 Eocene, 114 epidote, 65, 73, 84, 104, 210, 245,

254, 309, 341, 366, 390 epidote cement zone, 46 Erendira area, 68 erosion, 110, 115, 136, 167, 170,

180, 181, 197, 202, 227, 229, 279, 315, 356, 397, 413, 417

glacial, 78 Escondido Formation, 110, 114, 117,

128, 133, 135, 137 Escuadra Formation, 162 Esperanza areas, 257 Esperanza chimney, 294 Esperanza Formation, 406, 413 Esperanza subbasin, 137 Esperanza vein, 391 Espíritu Santo vein, 387 Etla District, 349 euhedral crystals, 236 Euphorbia antisyphilitica, 109 evaporation, 184 evaporites, 131, 241, 420 évapotranspiration, 66, 99 Exogyra, 145, 146, 155

costata, 112, 114, 135 ponderosa, 112

exploration coal, 127 geochemical, 101 geothermal, 12, 15, 23, 42 sulfur, 415

extension, 86, 181 Faby Tuff, 84 facies

amphibolite, 373 clay, 155 continental, 133, 155 diatomite, 189 fluvial, 133 greenschist, 370, 373, 384 La Negra, 291 marine, 137, 155


Index 421

phosphatic, 186 FAST. See Fracture-Assisted Steam

Flood Technology faults, 28, 84, 138, 195, 219, 272,

283 , 289, 302, 324, 349, 365, 380, 406, 407

Agua Fría, 64, 65, 67, 68 Arana, 219, 223 Arenas, 84 Brawley/Imperial, 28 Bustillos, 244 Cañada Muñiz, 10 Central, 301 Cerro Prieto, 36, 41 Chicoasén-Malpaso, 10 Chorro, 244 Concordia, 299, 301 Descubridora, 261 El Chino, 65, 67, 68 El Vampiro, 63 El Viejón, 63 Flojo, 283 Gibraltar, 261 Guadalupe, 299, 301 Guamuchil, 219 Hidalgo, 28 Imperial, 41 J-Norte, 244 La Azufrera, 104 La Barranca, 84 La Bufa, 283 La Cuesta, 84 La Encantada, 256 Loma Blanca, 84, 85, 90 Los Azufres, 67 Los Conejos, 84 Los Humeros, 84, 85, 89 Mastaloya, 84, 90 Michoacán, 41 Miguel Hidalgo, 299 Montaña, 261 Morelia, 28 Naica, 261 normal, 63, 149, 186, 190, 195,

219, 233, 244, 256, 301, 335, 344, 347, 374, 413

Peñoles, 244 Pozo, 283 Principal, 283 reverse, 137, 157, 233 Río Caliente, 98 San Alejo, 67 San Pedro, 386 Santa Agueda, 195 Santiaguillo, 267 strike-slip, 38, 79 Tehuacán, 261 Torino, 261 transform, 20, 24, 28, 36 transverse, 84 troughs, 79

fauna, 148 fayalite, 247 Federal Commission of Electricity

(CFE), 4 feldspars, 254, 272, 315, 329, 358,

360, 387 phenocrysts, 386, 387

felsic intrusives, 161

felsites, 244 dikes, 261

ferromolybdenite, 202 Flojo fault, 283 flooding, 7 Florida-Barrigón deposit, 197 flows

andesite, 59, 63, 83, 219, 272, 296

basalt, 133, 195, 365, 373 breccia, 195 dacite, 296 felsic, 229 ground water, 99 heat, 59, 269 hot-spring, 99 hydrothermal, 84 ignimbritic, 98 lava, 62, 78, 98, 151, 170, 229,

298, 356, 382, 406, 407 pyroclastic, 98, 380 rhyolite, 96, 231, 244 sand, 96 thermal, 11, 85 tuff, 148, 195 volcanic, 318, 339, 380

fluids geothermal, 52, 87, 90 hydrothermal, 51, 84, 336, 412 thermal 84

fluorapatite, 331 fluorine, 264 fluorite, 236, 240, 245, 247, 254,

261, 263, 268, 274, 287, 288, 380, 381, 388, 397, 400

fly ash, 127 flysch, 279, 344, 396 foraminifera, 180

planktonic, 184, 190 Fortuna area, 257, 389 fossils

ammonite, 272 flora, 148

Fracture-Assisted Steam Flood Technology, 127

Frasch process, 415 freibergite, 375, 400 Fresnillo, Zacatecas, 240, 381 Fresnillo Beleña Mine, 383 Fresnillo Cerro Proaño deposit, 397 Fresnillo District, 396

reserves, 394 silver production, 393

Fresnillo mines, 3 83 Fresnillo Mining District, 383

stratigraphy, 385 Fresnillo plant, 295 Friio No Marino Formation, 161, 164 Fronteras township, 149 fuels

nuclear, 4 solid fossil, 120

Fuentes-Rio Escondido Basin, lithologic units, 110

fumarole, 17, 32, 66, 84, 87, 90, 95, 98, 101, 104

Fundifora de Monterrey, 159 furnace slag, 127

gabros, 347 galena, 196, 214, 218, 225, 236, 245,

247, 257, 263, 268, 274, 294, 301, 310, 328, 335, 358, 363, 375, 380, 387, 390, 392, 400, 412

gangue minerals, 196, 225, 248, 275, 285, 294, 328, 358, 366, 371, 380, 390, 392

garnet, 200, 262, 263, 272, 275, 294, 299, 309, 315, 341, 347

garnierite, 345 gas, 8, 170

atmospheric, 33 noble, 33

gastropods, 114, 155, 280 genetic hypothesis, 319 geochemistry, 32,87,202,284,412 geochronology, 413 geocronite, 360 geohydrologic potential, 170 geohydrology, 4, 128,167 geology, 63,161,173,195, 215,

219, 235, 259,287, 291,315, 333,343,373,383,395

applied, 10 historical, 131,140,142,147,150,

151 local, 119 regional, 23, 59, 77 ,109, 210, 218,

229, 241, 259, 269, 291, 333, 343,365,373,380,384

structural, 28, 63, 84,117,120, 137,142,146,149,151,157, 219,244

subsurface, 27, 64 geomorphology, 109,119, 356, 396 Georgetown Formation, 261 geothermal deposits, 11 geothermal energy, 3,11

reserves, 3 geothermal exploration, 12, 15, 23,

42 geothermal fields, 15, 23, 63, 65, 68,

72, 74 geothermal model, 71 geothermal plants, 12 geothermal provinces, 15,18 geothermal reservoir, 16, 52, 72 geothermal resources, 11 ,15 geothermal system, 413 geothermal wells, 28, 44, 87, 95 geothermoelectric generation, 15 geothermometry, 87 geothermopower generation, 12 geysers, 32 Gibraltar fault, 261 Gibraltar manto, 263 glass, 63, 98

devitrified, 359 glauconite, 142 Glen Rose Formation, 241 Globotruncana, 144 Gloria Formation, 195 gneiss, 146, 240, 318, 331, 349

augen, 373 Gochico deposit, 205 Gochico mine, 205 goethite, 257, 341, 371


430 Index

gold, 177, 227, 237, 240, 252, 265, 268, 275, 286, 323, 327, 331, 353, 356, 358, 360, 363, 371, 373, 376, 391, 397, 404, 408, 412, 414

deposits, 219, 284 mines, 267 native, 284, 371, 387 production, 323, 326, 405 reserves, 328

Golondrina Mine, 379 grabens, 36, 62, 64, 77, 78, 170, 269 Gradenza Mine, 360 Gradenza orebody, 356, 358 Grande River, 10 granite, 15, 24, 77, 199, 219, 339,

358, 365 granitic basement, 51 granodiorite, 24, 201, 210, 218, 219,

229, 237, 249, 244, 291, 318, 327, 331, 339, 353, 358, 365, 377

graphite, 147, 148, 331 gravels, 27, 128, 136, 146, 149, 189 gravity, 86 graywacke, 344, 345, 377, 385, 389,

390 Great Mexican Geosyncline, 170,

240 greenschist, 79, 370, 373, 384 greenstones, 391, 396 Grijalva River basin, 3 grossularite, 245, 263, 272, 299 ground waters, 170 Gryphaea, 261, 318 Guacamaya Formation, 315, 318 Guadalupe, 253, 257 Guadalupe block, 302 Guadalupe fault, 299, 301 Guadalupe Mine, 201, 295, 370, 379 Guadalupe Victoria, 15 Guadalupe Victoria anomaly, 16 Guamuchil fault, 219 guanajuatite, 412 Guanajuato, 240, 287, 395, 403

mines, 404 ore types, 412

Guanajuato Conglomerate, 296, 413 Guanajuato District

geochemistry, 412 mineralogy, 412 production, 405 thermometry, 412

Guanajuato Formation, 406 Guanajuato Group, 405

metallurgy, 413 smelter capacity, 413

Guanajuato Mining District, 403, 407, 406

Guanajuato Veta Madre, 403 Guascama, 240 Guentes-Rxo Escondido Basin, 107,

129 Guerrero, 159, 331, 353, 377, 379 Guerrero Mine, 379 Gulf of Mexico Coastal Plain, 139 Guzmantla Formation, 80 gypsum, 133, 180, 181, 184, 186,

190, 196, 359, 380, 416

Hacienda de Charcas Viejas, 285 Hacienda Grande Mine, 383 Hacienda Proano Mine, 383 hausmannite, 320 heat flow, 59, 269 hedenbergite, 245, 262, 263, 341,

390 hematite, 65, 104, 201, 245, 257,

284, 320, 341, 347, 371, 385, 392

residual, 200 hemimorphite, 258, 284, 371, 400 hessite, 294 Hidalgo, 159, 261, 295, 315, 323 Hidalgo fault, 28 homocline, 117, 120 Homo my a, 261 hornblende, 78, 254, 358 hornfels, 253, 257, 339 Homos Member, 218 horsts, 62, 64 Hosston Formation, 131 hot springs, 17, 32, 65, 95 Huajuapan Formation, 146 Huaycocotla anticlinorium, 79, 219,

315 Huaycocotla Formation, 80, 315, 319 Huitzo, Oaxaca, 349 Huitzo area, 352 Huitzo titanium, 331 Huizachal Formation, 80, 315, 319 hydration, 186 hydrocarbons, 1, 8 ,127 , 421 hydroelectric generation, 7 hydroelectric plan, national, 7 hydroelectricity, 7 hydrogeology, 99 hydrology, 5,9 hydromagnesite, 346 hydropower plants, 3 hydropower potential, 8 hydrothermal alteration, 299, 390,

411 hydrothermal deposits, 161 hydrothermal fluids, 336, 412 hydrothermal mineralization, 385 hydrothermal system, 28 hydroxides, 328 hydrozincite, 400 hypersthene, 407 Ibarra vein, 233, 236 Idoceras, beds, 146 ignimbrites, 15, 20, 83, 84, 95, 96,

105, 162, 197, 218, 386, 407 ilmenite, 331, 349, 351 ilvaite, 247 Imperial fault, 41 Indidura Formation, 229, 231 indium, 376 Infierno Formation, 195 infiltration, 30, 51, 66, 99 Inguaran Mine, 365, 366 Inguaran Mining District, 365 Inoceramus, 144

undulatiplicatus, 110 Intermediate Fossiliferous Limestone

Member, 241 intraclasts, 260, 299

iron, 127, 257, 264, 283, 313, 339, 341, 349, 376, 411

mines, 354 ores, 339, 342 prospects, 177

iron oxides, 162, 328, 349, 387, 400 irrigation, canal, 172 isotopic ratios, 413 Ixcuintoyac Formation, 377 Ixmiquilpán-Actopán area, 296 J-Norte fault, 244 Jackson Group, 142 Jalapa, 77 Jalisco, 15, 95, 355 jalpaite, 225, 284 jamesonite, 380 jarosite, 200, 268, 371 jasper, 196, 336 Jáltipan dome, 415, 419, 423 Jesús María orebody, 358 Jimulco anticlinoria, 269 José-López Portillo Power Plant, 127 José-López Thermoelectric Power

Station Project, 109 Juliantra area, 379 Juniperus sp., 369 Jurassic, 131, 210, 296, 315, 357

middle, 145 kaolin, 202, 387 kaolinization, 272 kerargyrite, 371 Kia Formation, 269 Kiamichi Formation, 131, 261 Kicc Formation, 269 knebelite, 247 kutnahorite, 320 La Aguja sector, 151 La Aurora deposit, 283, 285 La Azufrera fault, 104 La Azufrera zone, 104 La Bandera, 339 La Barranca fault, 84 La Blanca mine, 275 La Bufa fault, 283 La Bufa Mine, 284, 285 La Caja Formation, 131, 279 La Campaña vein, 283 La Cañada, 339 La Caridad copper deposits, 197, 201 La Caridad fanglomerate, 201 La Carolina Syncline, 298 La Casita Group, 131 La Ciénaga dome, 419 La Colorado deposit, 199 La Colorado mineral body, 199 La Coma, 161 La Coma deposit, 162,164 La Coma project, 164 La Cruz mine, 295 La Cuesta fault, 84 La Cumbre, 65 La Cumbre Module, 72 La Dicha, Guerrero, 353, 377 La Encantada

geological model, 257 deposits, 257


Index 421

La Encantada dome, 419 La Encantada fault, 256 La Encantada Mine, 256 La Encantada Mining District

geology, 253 mineralization, 253 stratigraphy, 253

La Escondida, 253 La Escondida chimney, 256 La Esmeralda, Mexico, 353 La Esmeralda District, 267 La Esperanzas subbasin, 131 La Faja de Oro, 1 La Gloria, 134 La Gloria anticline, 137 La Gloria Formation, 131 La Guadalupe pegmatite deposit, 201 La Huacana Municipality, Michoacán,

365 La India Mine, 275 La Joya Formation, 279, 280, 283 La Joya/Zuloaga Limestone contact,

283 La Laguna, 170 La Laja, 96 La Luz, 403, 408 La Luz Complex, 407 La Luz District, 403 La Luz-La Cruz area, 299 La Luz orebody, 408 La Luz system, 407, 408 La Luz vein, 403, 408 La Malinche, 77, 78 La Mina Unit, 370 La Minita borite deposit, 335

genesis, 33 3 geology, 333 reserves, 336

La Minita mine, 333 La Mixteca coal basin, 142

coal deposits, 146 coal reserves, 147 stratigraphy, 144

La Mula Formation, 131 La Mula Island, 131 La Negra facies, 291 La Negra Member, 299, 305 La Negra mine, 291 La Negra mining unit

geology, 291 mineralization, 291

La Negra orebody, 291, 294 La Oliva mine, 177 La Paz Anticline, 298 La Paz isthmus, 181 La Página Mine, 275 La Peña Formation, 115, 131, 253,

279, 283 La Peregrina, 404 La Pez-1, 1 La Pimiento Formation, 131 La Pirita orebody, 356, 358 La Preciosa mine, 164 La Prieta, 253, 367 La Prieta chimney, 256 La Prieta fault zone, 361 La Prieta Mine, 355, 361 La Prieta Oreshoot, 356 La Primavera, 15

drilling, 101 exploration, 100 geology, 96 geothermal field, 95,105 hydrogeology, 99 spa, 98 well production, 104

La Rata anticline, 137 La Reina orebody, 283, 285 La Salvadora mine, 159 La Sierra system, 407, 408 La Suerte Ranch, 186 La Torres Mine, 407 La Trinidad Mine, 284 La Valenciana Mine, 403, 407 La Villita, 3 La Virgen Formation, 131 La Vuelta cliff, 189 La Yerbabuena glassy rhyolite, 63 lacustrine deposits, 133 lagoons, 32 Laguna Verde, 65 Lajas Palo Verde, 184 Lake Chapala, 96 Lampacitos subbasin, 137 lapilli, lithic, 406 Laredo Formation, 142 Larrea divaricata, 109 Las Adjunctas subbasion, 131, 137 Las Animas Mine, 310, 313 Las Bibianas deposit, 283 Las Bolas orebody, 358 Las Cocinas Mine, 275 Las Cumbres, 64 Las Derrumbaderas, 15, 78 Las Derrumbaderas geothermal zone,

17 Las Espinas Formation, 296, 298 Las Espinas volcanics, 298 Las Frajüitas sector, 151 Las Hormigas, 284 Las Huertas, 142, 147 Las Lupes area, 280

deposit, 283, 285 Las Margaritas deposit, 162 Las Minas, 79 Las Minas Copper, 354 Las Planillas dome, 100 Las Rusias anticline, 137 Las Torres-Cedros Mine, 405 Las Torres Mine, 405, 406 Las Trancas Formation, 291, 296 Las Tres, 20 Las Truchas, 339

iron deposits, 339, 342 Las Vacas, 146 Las Vacas Canyon, 134 latites, 195, 219, 298

dikes, 301 lava, 63, 64, 78, 95, 96, 98, 147, 180,

197, 218, 270, 406 aphanitic, 98 dacitic, 63 domes, 98 flows, 62, 78, 98, 151, 170, 229,

298, 356, 382, 406, 407 pre-Tala rhyolitic, 98 southeast arch, 99

Lágrima Formation, 241

leaching, 164 lead, 196, 218, 225, 236, 240, 252,

264, 268, 272, 275, 285, 295, 304, 309, 313, 331, 335, 337, 353, 356, 363, 371, 373, 376, 389, 391, 392, 395, 399, 412

lead sulfides, 366 lenses, 188 lenticles, 188 Leones-Santa Isabel trend, 283 Leones vein, 283, 284, 285 Leopardo, 339 leucoxene, 104 Libres-Oriental basin, 77 Libres-Oriental graben, 78, 79, 80 lignite, 120, 140, 159 limestone, 3, 10, 15, 17, 20, 77, 80,

84, 90, 95, 110, 115, 127, 131, 134, 136, 145, 147, 161, 167, 184, 190, 196, 199, 210, 214, 229, 231, 239, 241, 244, 247, 253, 256, 260, 268, 272, 275, 279, 283, 289, 291, 294, 296, 299, 309, 318, 324, 331, 333, 335, 339, 370, 377, 380, 382, 386, 397, 421

cap rock, 422 crystalline, 422 marine, 195 reef, 167, 170

limonite, 202, 257, 268, 320, 341, 347, 371, 392

Lista Blanca Formation, 147 lithium, 32, 412 Llano Grande, 99 Lolotla, Hidalgo, 315 Loma Blanca fault, 84, 85, 90 Loma de Plata Formation, 261 Lomo de Toro mine, 295 Los Ajolotes, 65 Los Amóles deposit, 164 Los Amóles project, 164 Los Angeles mantos, 257 Los Azufres, 15, 64

drilling, 71 fault, 67 geochemistry, 68 geothermal field, 59, 74, 100 geothermal model, 71

Los Azufres Lagoon, 65 Los Azules Mines, 272, 274 Los Balcones, 295 Los Clarines Mines, 267 Los Conejos fault, 84 Los Humeros, 15

fault, 84, 85, 89 geology, 80 geothermal field, 77, 87, 88, 89, 90

Los Libres Mine, 275 Los Potreros caldera, 83 Los Tejocotes region, 329 Loseros Formation, 406 Louann Salt Formation, 417 Lower Fossiliferous Limestone

Member, 241, 248, 251 Lucifer mine, 177 Maconi Mining District, 291 macrofossils, 261


432 Index

magma, 99, 284, 327 acid, 240

magmatic chambers, 19 magmatism, 170,298, 347, 385 magnesium, 32, 41, 412 magnetite, 214, 245, 247, 254, 310,

320, 331, 335, 341, 346, 349, 390

magnetometry, 86 malachite, 202, 268, 328, 392 Maltrata Formation, 80 Manatí dome, 419 manganese, 177, 195, 196, 241, 248,

264, 318, 319, 381 manganese dioxides, 320 manganese oxides, 196, 328, 387,

400 mantos, 240, 241, 244, 247, 251,

252, 257, 262, 263, 280, 294, 309, 335, 349, 351, 356, 358, 360, 387, 389

Maravatío-Jerécuaro Valley, 66 marble, 80, 147, 253, 257, 384, 406 marcasite, 263, 274, 275, 380, 392,

412 Marine Aguja, 157 marine currents, 190 marine limestone, 195 marine transgression, 133 Maritaro, 64, 65 Maritaro module, 72 marls, 80, 135, 144, 145, 146, 167,

267, 296, 385 marmatite, 247, 263, 294, 390, 400 martite, 341 Mastaloya caldera, 83 Mastaloya fault, 84, 90 matildite, 284, 390 Maverick County, Texas, 107, 114,

127 Mazapil, Zacatecas, 146 Mazatepec, 79 McNight Formation, 128 Medio Balsas basin, 66 Melchor Ocampo, Michoacán, 339 Mellado Mine, 403 melting, partial, 27 melts, 65 Menchaca Formation, 131 Méndez Formation, 80, 135 mercury, 381 Mesa Cartujanos, 135 Mesa Central physiographic province,

384, 396 Mesa de La Sanguijuela, 147 Mesa de Tenayac basalts, 374 Mesa de Tizapa, 374 Mesa del Corazón, 357 Mesa El León dome, 98 Mesa El Nejahuete dome, 98 Mesa La Lobera dome, 98 Mesa Santa Rosa, 96 Meseta Central physiographic

province, 406 Meseta del Norte physiographic

province, 356 mesostasis, 386 metaconglomerates, 315 metagranites, 344

metallic elements, 245 metallogenic belts, 175 metallogenic provinces, 173,175 metallurgical processes, 402 Metamorphic Rocks Project, 373 metamorphism, 149, 210, 232, 269,

272, 275, 284, 351, 373, 377 metarhyolites, 373 metasediments, 384 metasomatism, 184, 210, 272, 274 Mexicali Valley, 16, 20, 23, 28, 30,

36, 51 Mexican Geosyncline, 131, 279 Mexican Neovolcanic Belt, 96 Mexican Plateau, 296 Mexican Volcanic Belt, 15, 18, 62,

77, 105 eastern boundary, 78

Mexico Coastal Plain Physiographic Province, 109

Mexico Salt Basin, 416, 422 Mexiquillo, 210 Mezcala Formation, 80, 291 mica, 84, 349 Michoacan, 3, 15, 59, 63, 159, 333,

339, 357, 365 fault, 41

micrites, 260, 261 microfossils, 180 microseismicity, 41, 86 Midway Group, 114 Miguel Hidalgo fault, 299 Mil Cumbres Sierra, 66 Milagros area, 297 Mina de Agua, 267 Mina del Pedregal, 379 Mina El Muerto area, 157, 159 Mina Morelos ore deposit, 283 Mina Nueva system, 408 Mina Vieja dike, 244 Mina Vieja system, 408 Minas del Oro, 356, 358, 360 Minatitlan dome, 419 Mineral Real de Angeles, 395 mineralization, 105, 199,201,218,

247, 256, 262, 283, 289, 294, 302, 331, 353, 377, 399

hydrothermal, 385 phosphorite, 397 radioactive, 397 sulfide, 225

mineralogy, 236, 300 hydrothermal, 104

minerals, 195,205,403 alteration, 104 clay, 65, 104 ferromagnesian, 254, 386 gangue, 392 hydrothermal, 28 hypogene, 200 metallic, 5, 240 noncommerical, 225 nonmetallic, 5, 240 opaque, 254, 309 radioactive, 11, 164, 349 rare, 194 selenium, 412 uranium, 162 See also specific minerals

mines Baja California Norte, 177 Baja California Sur, 177 Bolaflitos, 413 Buena Tierra, 241, 244 Canutillo, 201 Capsa-Regenerador, 370 Cata, 403 Cebada, 405, 412, 413 Concordia, 295 El Arco, 177 El Boleo, 177, 195 El Cristo, 159 El Fenomeno, 177 El Mezquite, 164 El Monte, 299 El Nopal, 152 El Realito, 288 El Refugio, 237, 288 El Tigre, 177 El Triunfo, 177 Fresnillo, 383 Fresnillo Beleña, 383 Gochico, 205 gold, 267 Golondrina, 379 Gradenza, 360 Guadalupe, 201, 295, 370, 379 Guanajuato, 404 Guerrero, 379 Hacienda Grande, 383 Hacienda Proaño, 383 iron, 354 La Blanca, 275 La Bufa, 284, 285 La Cruz, 295 La Encantada, 256 La India, 275 La Minita, 333 La Negra, 291 La Oliva, 177 La Página, 275 La Preciosa, 164 La Prieta, 355, 361 La Salvadora, 159 La Torres, 407 La Trinidad 284 La Valenciana, 403, 407 Las Animas, 310, 313 Las Cocinas, 275 Las Torres, 405, 406 Las Torres-Cedros, 405 Lomo de Toro, 295 Los Azules, 272, 274 Los Clarines, 267 Los Libres, 275 Lucifer, 177 metallic, 173 Morelos, 280, 285 Naica, 259 Naricero, 358, 360 nonmetallic, 173 Noria de San Pantaleón, 237 Pachuca, 237 Pachuqueño, 370 Pegaso asbestos, 345 Peregrina, 407, 408, 412, 413 Porfirio Díaz, 275 Potosí, 241, 252, 283


Index 421

Proaño, 383 Rayas, 403 Real de Angeles, 395, 396 Reina del Cobre, 272, 274, 275, 278 Remedios, 379 Río Escondido, 109 Sabinas, 237, 238 San Antonio, 241, 244, 245, 252,

379 San Diego, 275, 283 San Femando, 295 San Francisco, 383 San Francisco del Oro, 267 San Hilario 177 San Isidro, 275 San Juan de la Costa, 177, 236 San Martin, 233, 236, 237 San Sebastián, 285 Santa Domingo, 177 Santa Eulalia, 280 Santa Fe, 327, 331 Santa María, 272, 275, 278 Santa Rita, 177, 295 Santa Rosalia, 177 silver, 267 Sirena, 403 Socorredora, 359 Tatatile iron, 354 Tejocjotes, 329 Tembabiche, 177 Tepeyac, 403 Terneras, 278 Tiro General, 283, 284, 285 Torres, 412 Torres-Cedros, 413 Valenciana, 412 Zacatecas, 403

Mining Metallurgie Production Project, 162

mining industry, J Miocene, 14 M ir if usus sp., 385 Mixtepec area, 142, 145, 147 models

Cerro Prieto geothermal field, 23 geochemical, 88 geothermal, 71,90 SHAFT-79, 48

Molango, Hidalgo, 315 Molango Manganese District, 315,

321 molybdenite, 199, 201, 263 molybdenum, 162, 201, 202 Monclova, 131 Monclova Basin, 110 Monclova Limestone, 131 Monclova subbasin, 131, 137 Montaña fault, 261 Monterrey Formation, 179, 180

facies, 186 lithology, 181 outcrops, 179 prospects, 191 stratigraphy, 179 structure, 179

montmorillonite, 387, 412 Montosa, Durango, 164 montronites, 412 monzonite, 298, 299, 339

Morelia fault, 28 Morelia-Queréndaro Valley, 66 Morelos Mine, 280, 285 Morita Formation, 150 Mortoniceras leonense, 261 Mother Vein, 403 mud pots, 32 mudstone, 27, 114, 134 Murial Formation, 150 muscovite, 377 Múzquiz anticline, 138 myrargirite, 325 Naco township, 149 Naica, 240

caves, 261 fault, 261 mineral deposits, 259

Naica Mine, 259 Naricero Mine, 358, 360 Naricero orebody, 358, 360 national hydroelectric plan, 7 naumannite, 412 Nava, Coahuila, 109, 129 Nava plant, 4 Navarro Group, 135 Negra chimney, 294 Neithea texana, 261 neotacite, 202 Neovolcanic Axis Metallogenetic

Province, 324, 353, 365 Nerinea, 144 nickel, 196 Nivel del Cobre ore, 328 nonclastic processes, 184, 190, 191 Nopal Formation, 152 Nopal I deposit, 162 Nopalapa dome, 415, 522, 523 Nopalapa well, 420 Nopalito, 65, 68 Noria de Angeles Municipality,

Zacatecas, 395 Noria de San Pantaleón mine, 237 Norma Conglomerate, 164 Norte dome, 419 North American trough, 24 Northern Central Mesa physiographic

province, 151 Northwest block, 302 nsutite, 320 nuclear energy, 4,161 nuclear fuels, 4 Nueva vein, 283 Nuevo León, 129, 135, 139, 159, 162 oases, 180 Oaxaca, 20, 142, 159, 164, 167, 329,

331,349 Oaxaca Highland subprovince, 142 Oaxaca Peninsula, 343, 347 Oaxaca sedimentary basin, 145, 146 obsidian, 63 Ocampo, Coahuila, 253 oceanic crust, 385 Ocotepec domes, 78 oil, 1, 8, 170

fields, 1 industry nationalization, 1 in situ development, 112

producing areas, 2 reserves, 2

Ojinaga Basin, 134, 155 coal reserves, 157 stratigraphy, 155

Ojo de Agua, 137 olivine, 272 Olmos Formation, 4, 110, 112, 117,

119, 127, 128, 133, 134, 151, 157

Olmos Station, 112 Olvido Formation, 131 ooze, 184, 190 opal deposit, 354 opaque minerals, 309 opencast mining, 395 ophiolite complex, 347 Ophiomorpha, 112 Opuntia ficus indica, 109 Orizapa Formation, 80 orogenesis, 150 Ostrea, 150, 155

coquinas, 145 glabra, 114 saltillensis, 134 sp., 318

Otatera Formation, 144, 145 Otates, 210 Otozamites, 315 outcrops, Monterrey Formation, 179 Ov alios, 134, 138 Ovallos anticline, 137 overflows, basalt, 148 oxidation, 272, 400 oxides, 65, 73, 104, 196, 251, 335,

345, 346 Oyameles dome, 78 oysters, 131 Pachuca District, 323, 325, 395 Pachuca Group, 298 Pachuca mine, 237 Pachuca-Real del Monte Mining

District, 323 Pachuqueño Mine, 370 Padilla Formation, 131 Pajaritos dome, 419 paleochannels, 135 paleogeography, 180

regional, 115 paleomagnetism, 86 paleotectonics, 180 Paleozoic, 145,147 Palmillas District, 267 Palo Verde limestone, 184 Panga de Abajo, 37 paragenesis, 236,284,400 paraguanajuatite, 412 Parathyridina, 145, 146 Parral Chicuahua, 240 Parral District, 267 Parral Formation, 267 Parral Super district, 267 Patanellium sp., 385 Patámbaro anticline, 59 Pathé, Hidalgo, 15 patio process, 404 Patrocino orebody, 358 payonite, 390


434 Index

Pájaros Azules anticline, 138 Pátzcuaro fault, 28, 41 pearceite, 412 peat depositó, 119, 120, 159 pectolite, 345 Pedregal dome, 419 Pegaso asbestos deposit, 343, 346 Pegaso asbestos mine, 345 pegmatites, 349 pelecypods, 114, 155, 280 Peña Ayuquila, 159 Peña Blanca, 162 Peña Blanca project, 164 Peña Blanca Ranch, 151 Peñoles deposit, 162 Peñoles fault, 244 Peñón Blanco, 397 percolation, 30 Peregrina-El Cubo area, 403 Peregrina Mine, 403, 407, 408, 412,

413 plants, 404

peridotites, 347 Perla, Durango, 164 perlite, 196 permeability, 47, 51, 52, 72, 84, 90,

104, 115, 313 Permian, 315 Petróleos Mexicanos, 2 Phasianella sp., 145 phenocrysts, 63, 78, 96, 231, 272

andesite, 272 feldspar, 386, 387 plagioclase, 361, 365 quartz, 357

phlogopite, 199 phosphate, 186 phosphate rock prospects, 179 phosphorites, 177, 184, 186, 189,

190, 191, 397 phosphorous, 349 phyllites, 145, 279, 343, 344, 357,

358, 373, 374, 384 graphitic, 373

physiographic provinces, 109 physiography, 109,139, 142, 147,

149,151,155,259, 296, 356 Pichucalco, Chiapas, 327 Pico de Orizaba, 77, 78 Pico de Orizaba-Cofre de Perote Range ,

78 Piedras Negras, 109 Pilares de Nacozair Chimney, 197 Pimienta Formation, 80, 84, 318, 320 Pinar de la Venta dome, 98 Pinito, Durango, 164 Pinos area, 397 Pinta Sierra, 24 Pinus ocote, 369 pitchblende, 161, 162 plagioclase, 63, 78, 231, 254, 301,

307, 386 crystals, 137, 406 phenocrysts, 361, 365

plants back-pressure, 75 coal-fired power, 4, 129 cyanide-process, 404 geothermal power, 12, 15

hydroelectric, 3, 8 hydropower, 3 Nava, 4 Peregrina Mine, 404 thermoelectric, 7

Pliocene, 114 pluton, 201 POISE (Programa Obras e Inversiones

del Sectorn Eléctrico), 8, 14 pollution, environmental, 8 polybasite, 218, 380, 391, 412 polybasite-arsenopolybasite, 392 polymetallic deposits, 243, 331, 353,

381 ponding, 135 Porfirio Díaz mine, 275 porosity, 47, 52, 72, 73, 91, 115 porphyry, 254

quartz-monzonite, 387 rhyolite, 244, 357

potassic alteration, 201 potassium, 32, 412, 420 potassium feldspar, 201, 261, 283,

301 Potosí dike, 244 Potosí Mine, 241, 252, 283 Potosí vein, 251 Potrero de Tanila, 339 power generation, 124, 129

development, 7 Poza Rica, 1 Pozo fault, 283 Pozo Hediondo, 65, 68 Precambrian, 315 precipitation, 66, 99, 109

chemical, 184 prehnite-pumpellyite, 370 Presidio County, 107 Principal fault, 283 Proaño Group, 385,387,390 Proaño Mine, 383 production

gold, 323, 326, 405 silver, 251, 323, 326, 370, 380,

393, 405 Programa Obras e Inversiones del

Sectorn Eléctrico. See POISE Prohystoceras, 261 projects

Chicoasén hydroelectric, 10 hydropower, 9 José-López Thermoelectric Power

Station, 109 La Coma, 164 Los Amóles, 164 Metamorphic Rocks, 373 Peña Blanca, 164 UF-1, 165

propylitization, 272, 299, 371 Prosopis juliflora, 109 proustite, 325, 380, 412 proustite-pyrargirite, 257, 360 Providencia vein, 387 pseudoboleite, 196 Pseudodictyomira sp., 385 Puebla, 15, 77, 80, 159 Puerto de Cabras Sierra, 59 Puerto del Angel, 298 Puerto EI deposit, 162

pull-apart basin, 28, 38 pumice, 63, 85, 98, 195 pumice pyroclastics, 96 pumicite, 189, 283 pumite, 196 pyrargirite, 245, 248, 325, 380, 412 pyrargirite-proustite, 391, 392 pyrite, 65, 73, 84, 104, 196, 199,

201, 214, 218, 236, 247, 254, 257, 261, 263, 274, 294, 299, 309, 319, 335, 341, 358, 360, 363, 367, 375, 380, 387, 390, 392, 400, 408, 412

crystals, 223, 318 disseminated, 254

pyrite-chalcopyrite, 201 pyrite-marcasite, 245 pyritization, 299 pyroclastics, 64, 95, 99, 146, 324,

353 pumice, 96

pyrolusite, 196, 320, 346 pyroxene, 341 pyrrhotite, 214, 235, 236, 247, 263,

274, 275, 294, 302, 310, 390, 392, 400, 412

quartz, 65, 73, 84, 104, 137, 145, 199, 201, 218, 227, 236, 245, 247, 261, 263, 267, 272, 274, 283, 299, 309, 315, 320, 324, 329, 335, 341, 344, 358, 360, 366, 375, 380, 386, 390, 400, 406, 408, 412

amethyst, 225 breccia, 210, 214 crystals, 63

quartz diorite, 201, 339 quartz-feldspar, 349 quartz-latite, 275, 358 quartz monzonite, 96, 195, 199, 366 quartz phenocrysts, 357 quartz-sericite alteration, 366 quartz veinlets, 223 quartz veins, 145 quartzite, 145, 148, 149, 199, 384

cobbles, 187 pebbles, 186

Quaternary, 133,136,149,170, 387 Quercus candinas, 369 Querétaro, 291, 381 Quinto mantos, 263 radioactive mineralizations, 397 Ramón Corona fault, 261 Rancho General, 142, 147 Rancho San José area, 155 rare earths, 5 Rayas Mine, 403 Real de Angeles deposit, 395

geology, 395 paragenesis, 400

Real de Angeles Mine, 395, 396 exploration, 401 production, 402 smelter productivity, 402

Real del Monte area, 325 Recent, 146 recharge, 33, 35, 48, 51, 66, 170


Index 421

red tide, 190 redbeds, 146, 406, 417 reef limestone, 167, 170 regression, 140, 147, 229

marine, 115, 117, 144, 170 Reina del Cobre Mine, 272, 274, 275,

278 Reineckia sp., 318 Remal-Ibarra vein, 233 Remedios Mine, 379 reserves

coal, 157 copper, 196, 327 geothermal energy, 3 gold, 328 iron ore, 342 lead, 399 oil, 2 silver, 327, 328, 394, 399 titanium minerals, 351 uranium ore, 4 zinc, 399

resistivity, 67, 72, 84, 86, 100 Rey de Plata deposit, 377 rhodochrosite, 320 Rhus exima, 109 rhyodacites, 161, 358 rhyolites, 20, 24, 161, 197, 199, 218,

219, 244, 267, 275, 283, 288, 289, 324, 335, 336, 357, 358, 361, 377, 386, 406

aphanitic, 98 dikes, 245, 267, 283, 324, 385 domes, 17, 63 flows, 63, 96, 231, 244, 397 La Yerbabuena glassy, 63 porphyry, 244, 357, 359 products, 78 tuffs, 358, 359, 386, 397

Riito, 15 Riito anomaly, 16 Rio Acalpica, 339 Rio Ameca Valley, 99 Rio Bravo area, 141 Rio Bravo Basin, 128 Río Caliente, 99, 100 Río Caliente fault, 98 Río Escondido

coals, 120 deposit, 4 development, 129 exploration, 129 reservoir, 127

Río Escondido Basin, 131 Rio Escondido Mine, 109 Rio Escondido Project, 114, 119, 128 Rio Grande de Santiago Canyon, 95 Rio Grande Embayment, 142 Rio Grande rift, 170 Rio La Cañada, 339 Río Las Truchas, 339 Río Sabinal, 146 Rio Salado dome, 98 Río Salado Valley, 99 Río San Isidro, 146 Rio Santa María, 287, 289 Río Tala, 99 Río Tlaxiaco localty, 146 Río Tolimán canyon, 298

rocks acid, 80, 269, 344, 358 acid extrusive, 161 andesitic, 66, 77, 95, 99 batholithic, 24 calc-alkaline, 63 calcareous, 241 carbonate, 283, 284, 320 extrusive, 24, 146, 218, 283, 384 host, 65, 170, 199, 218, 261, 272,

298, 313, 331, 349, 356, 361, 374, 399

hot, 73, 90 igneous, 24, 79, 86, 88, 146, 155,

164, 197, 218, 229, 231, 254, 261, 272, 283, 299, 318, 344, 345, 377, 396, 397, 406

intrusive, 20, 146, 148, 164, 201, 244, 254, 384, 397, 407

marine, 296, 395 metamorphic, 20, 59, 79, 145, 146,

147, 148, 164, 197, 229, 232, 240, 253, 254, 272, 315, 339, 343, 344, 349, 373,377, 396

metasedimentary, 370 metavolcanic, 370 phosphate, 165 post-batholithic, 24 pre-batholithic, 23 pyroclastic, 167, 386 reservoir, 65 schistose, 59 sedimentary, 3, 15, 20, 30, 47, 51,

79, 88, 90, 95, 136, 146, 148, 150, 152, 161, 164, 229, 239, 253, 259, 272, 299, 339, 343, 344, 358, 373, 377, 380, 385, 395, 406

siliceous, 397 volcanic, 14, 15, 17, 19, 71, 80,

86, 90, 95, 167, 195, 197, 199, 201, 241, 244, 269, 289, 291, 296, 335, 344, 357, 373, 377, 385

rodingsites, 347 Rosario anticlinoria, 269 Rosario dome, 419 Rosario Formation, 146, 147 Rosario vein, 387 Rosita, Coahuila, 4 rudists, 131, 144, 146, 335 runoff, 8 rutile, 349 Sabinal Formation, 146 Sabinas Basin, 114 Sabinas coal region, 114 Sabinas Conglomerate, 136 Sabinas District, 131

coal deposits, 136 reserves, 138 stratigraphy, 133

Sabinas Gulf, 131 Sabinas Mine, 237, 238 Sabinas-Monclova Coal District, 136,

137 Sabinas-Noria de San Pantaleón, 236 Sabinas-Reynosa Conglomerate, 114,

117, 119, 127, 128

Sabinas-Reynosa Formation, 110, 128 Sabinas subbasin, 131, 137 Sacramento anticline, 137 St. Thomas District, 107 Salinas Formation, 416, 417 salinity, 52, 383, 401 Salmon Peak Formation, 128 salt, 420

age, 417 movements, 417 tectonics, 418

Salt Basin, southeast Mexico, 416 Salt Basin domes, 415 salt domes, 1, 417

origin, 419 Saltillito-Lampacitos subbasin, 131,

17 Saltillito subbasin, 137 San Agustín Mine, 283 San Alejo, 64, 65, 68 San Alejo fault, 67 San Andreas System, 20 San Andrés dacite, 63 San Andrés Tuxtla Massif, 419 San Antonio dike, 247 San Antonio Mine, 241, 244, 245,

252, 379 San Bartolo Shaft, 285 San Bernabé vein, 403 San Buena Formation, 133, 136 San Carlos, 107, 240 San Cristóbal dome, 415, 419 San Diego body, 269 San Diego de Minas Nuevas, 267 San Diego mine, 275, 283 San Dimas District, 219 San Felipe, 298 San Felipe Formation, 80 San Fernando mine, 295 San Francisco del Oro mine, 267 San Francisco del Oro Mining District,

267 San Francisco Mine, 383 San Francisco Oaxaca, 349 San Francisco orebody, 253 San Francisco vein, 257, 283, 285 San Hilario area, 179 San Hilario mine, 177 San Isidro Formation, 146, 179, 180 San Isidro mine, 275 San Jerónimo, 138 San Joaquin Member, 299, 305 San José anticlinoria, 269 San José area, 257 San José orebody, 253 San José Volador Anticline, 298 San Juan area, 257 San Juan breccia, 368 San Juan Complex, 96 San Juan de la Costa, 165 San Juan de la Costa mine, 177, 236 San Juan Mixtepec, 165 San Juan sector, 151 San Lorenzo, 272 San Lorenzo anticlinorium, 269 San Luis breccia, 368 San Luis Potosí, 1, 159, 240, 261,

279, 381, 395 San Luis Potosi foundry, 295


436 Index

San Luis vein, 225 San Marcial area, 149 San Marcial Formation, 147, 148 San Marciai vein, 233 San Marcos aquifer, 99 San Marcos area, 151 San Marcos Formation, 131 San Marcos sector, 151 San Martin Mine, 233, 236, 237 San Martin Mining District, 229, 237,

396 San Miguel Formation, 110, 112, 117,

119, 121, 127, 128, 133,157 members, 134

San Miguel Ocaxichitlán, 159 San Miguel Ranch, 112, 133 San Nicholás, 387 San Nicolás mineworks, 403 San Pascual vein, 387 San Patricio chimney, 263 San Patricio subbasin, 131, 137, 138 San Pedro Corralitos, 134 San Pedro Corralitos Basin, 151,153 San Pedro fault, 386 San Pedro Formation, 80 San Pedro seam, 141 San Próspero, 408 San Pueblo Huitzo, Oaxaca, 349 San Rafael anticline, 283, 309 San Rafael anticlinorium, 279 San Rafael Valley, 279 San Rafael vein, 225 San Ricardo fault vein, 387, 391 San Salvador subbasin, 131, 137, 138 San Sebastián Mine, 285 San Sebastián vein, 283 sands, 27, 63, 115, 133, 136, 139,

149, 164 flows, 96 tar, 112, 127

sandstones, 27, 28, 30, 44, 46, 59, 80, 95, 110, 112, 117, 134, 136, 140, 142, 145, 148, 150, 155, 162, 164, 170, 195, 210, 244, 261, 267, 269, 279, 315, 318, 329, 335, 344, 358, 370, 377, 385, 399, 406

Sangangiiey Complex, 96 Sangrita basin, 269 sanidine, 406 Santa Agueda fault, 195 Santa Ana Maya Valley, 66 Santa Ana Member, 218 Santa Bárbara District, 267 Santa Catarina, Tayata, 164 Santa Domingo mine, 177 Santa Elena, 210 Santa Elena vein, 391 Santa Eulalia, 240 Santa Eulalia Mine, 280 Santa Eulalia mining district, 241, 261

silver production, 251 Santa Fe mine, 327, 331

reserves, 328 Santa Gertrudis anticline, 137 Santa Gorgonia area, 298 Santa Inés Foramtion, 136 Santa Isabel vein, 283, 285 Santa María de La Paz district, 261

Santa Maria dike, 272 Santa Maria dome, 269 Santa Maria Mine, 272, 275, 278 Santa Maria Tenexpan, Oaxaca, 349 Santa Niño vein, 193 Santa Rita mine, 177, 295 Santa Rolalia district, 195 Santa Rosa area, 151, 403 Santa Rosa deposit, ZÌI Santa Rosa galley, 201 Santa Rosa mineworks, 403 Santa Rosa vein, 283 Santa Rosalia, 195 Santa Rosalia copper district, 196 Santa Rosalia Formation, 195 Santa Rosalia mine, 177 Santiago Formation, 80, 318 Santiaguillo fault, 267 Santo Domingo, 164 Santo Tomás seam, 141, 142 Sara Alica, 210 Sardinas, 124 Sauceda de Multaos, 397 Saucillo, Chilhuahua, 255 scheelite, 263, 301, 367 schirmerite, 284 schists, 79, 146, 240, 331, 343, 344,

346, 373, 377, 380 muscovite, 374

scoria, 78 sea-floor spreading, 79 sedarenite, 386 sedimentation, 79, 140, 184 sediments, 142, 241

clastic, 170, 269 continental, 157 fluvial, 96, 119 marine, 157, 179 pelitic, 377 volcaniclastic, 241, 244

Segundo mantos, 263 seismics, passive, 67 selenides, 412 selenium minerals, 412 Senguio region, 59 sericite, 104, 145, 199, 201, 223,

299, 357, 358, 359, 375, 411 sericitization, 299, 371 serpentine, 320, 344, 345 Serranía del Burro, 110 SHAFT-79 program, 48, 52 shales, 27, 30, 45, 59, 80, 95, 110,

114, 127, 135, 137, 139, 141, 144, 146, 148, 150, 152, 155, 162, 167, 184, 186, 189, 210, 229, 231, 253, 261, 267, 269, 279, 283, 296, 298, 315, 329, 335, 358, 360, 370, 380, 385, 390, 406, 420

beds, 387 bituminous, 146 pebbles, 135

shark teeth, 186 siderite, 229, 390, 412 Sierra Aconchi, 164 Sierra Arteaga, 339 Sierra Capulin, 142 Sierra Chilicote, 254 Sierra Cobachi, 147

Sierra de Coneto, 164 Sierra de Cuale, 356 Sierra de Cucapá, 23 Sierra de Enmedio, 259, 261 Sierra de Guanajuato, 406 Sierra de La Mina, 259, 261 Sierra de Naica, 259, 261 Sierra de San Lorenzo, 274 Sierra del Monarca, 259, 261 Sierra El Monte, 296 Sierra Gorda, 406 Sierra group, 404 Sierra Guanajuato Gorda, 291 Sierra La Bartole, 136 Sierra La Encantada, 254 Sierra La Escondida, 152 Sierra La Giganta, 179 Sierra La Gloria, 137 Sierra La Laja, 95 Sierra La Lista Blanca, 147 Sierra La Primavera, 95, 98 Sierra La Vasca, 253 Sierra Madre de Oaxaca physiographic

province, 349 Sierra Madre del Sur, 167, 339 Sierra Madre del Sur geothermal

province, 20 Sierra Madre del Sur metallogenic

province, 331, 379 Sierra Madre del Sur physiographic

province, 142, 343, 369, 373 Sierra Madre Limestone, 170 Sierra Madre Occidental, 3, 15, 19, 95,

164, 167, 219, 339, 358 Sierra Madre Occidental geothermal

province, 19 Sierra Madre Occidental metallogenic

province, 19, 215 Sierra Madre Occidental physiographic

province, 149, 197, 229, 296 Sierra Madre Occidental sequence, 218 Sierra Madre Oriental, 77, 79, 296,

298, 324, 325 Sierra Madre Oriental geothermal

province, 20 Sierra Madre Oriental limestones, 382 Sierra Madre Oriental metallogenic

province, 239, 241, 261, 269, 279, 291

Sierra Negra, 78 Sierra Peña Blanca, 162 Sierra Rica, 157 Sierra San Marcos, 96 Sierra Santa Eulalia, 241 Sierra Santa Rosa, 138 Sierra Santo Domingo, 241

East Field, 241, 244, 245, 252 West Field, 241, 244,247, 252

Sierra Soledad, 219 Sierra Tapalapa, 95, 96 Sierras Atravesadas, 269 Sierras de Santa Maria, 272, 275 Sierras La Rota, 134 Sierras Múzquiz, 138 Sierras Tezompa, 79 silica, 32, 46, 63, 78, 105, 127, 184,

186, 210, 264, 329 silicates, 196, 245, 247, 262, 263,

302, 309, 345, 346, 347, 412


Index 421

silicification, 180, 272, 299, 371, 411

sills, 245, 261 andesitic, 151

silts, 27, 117, 135, 136, 149 siltstones, 27, 80, 110, 112, 114,

134, 135, 137, 141, 145, 146, 150, 151, 253, 269, 318, 344, 345, 358, 385, 399

silver, 177, 196, 218, 227, 237, 240, 244, 251, 263, 265, 268, 272, 275, 284, 286, 294, 299, 304, 309, 313, 323, 325, 328, 331, 333, 335, 337, 353, 356, 363, 371,373, 375, 377, 379, 389, 391, 395, 400, 404, 408, 412, 414

belt, 395 deposits, 219 melted, 403 mines, 267 native, 225, 236, 248, 257, 325,

371, 387, 392 production, 251, 323, 326, 370,

380, 393, 405 reserves, 327, 328, 394, 399 sulfosalts, 387 veins, 391

Silvia chimney, 294 Simón Formation, 145, 147 Sirena mine, 403 skarn, 80, 210, 253, 257, 261, 262,

291, 313, 339, 341 slates, 27, 406 smithsonite, 245, 257, 284 Snake Ridge Formation, 150 Socavón Member, 299 Socorredora Mine, 359 Socorredora orebody, 358 soils, 63, 136

development, 135 steaming, 84, 87

Soledad dome, 419 Solosuchiapa, Chiapas, 327, 331 Sombrerete, Zacatecas, 229, 383, 396 Sonora, 147,149,164, 167, 199, 201 Sonora Desert, 20 Sonora Desert physiographic

province, 147 Sonora-Sinaloa Sierras geothermal

province, 230 Sosola Formation, 344 Southeast block, 302 Sovavón del Rey, 379 Soyatal Formation, 291, 296, 298 specularite, 247, 341 spessartite, 339 sphalerite, 214, 218, 225, 236, 245,

247, 263, 274, 299, 302, 310, 328, 335, 358, 359, 360, 361, 363, 371, 375, 380, 387, 391, 392, 412

sphene, 301 Sphenodiscus, 134

pleurisepta, 114 sp., 114, 135

spherule, 63 spherulites, 98 spreading centers, 36

springs, sulfur, 17 stannite, 363 stephanite, 412 stibnite, 236, 284, 329, 380 stocks, 150, 197, 199, 201, 219, 272

granite, 407 stockworks, 387,408 stratigraphy, 63, 79,110,119,133,

140,144,147,150,151,155, 241,253,259,279,296, 357, 370, 384, 385, 396, 406

stratovolcanoes, 63, 77, 83 stromeyerite, 225, 284, 335, 359 strontium, 284 subduction, 24, 62, 95, 96, 177 sublithoarenite, 386 subsidence, 36, 40, 133, 140, 181,

279 sulfates, 32, 248, 335 sulfide group, 299 sulfide zone, 196, 245 sulfides, 201, 214, 225, 237, 245,

247, 248, 249, 251, 261, 274, 295, 301, 302, 335, 336, 375, 377, 390, 400, 412

disseminated, 358, 360 lead, 366 massive, 236, 251, 262, 263, 301,

310, 353, 358, 360, 363, 373 mineralization, 225 ores, 265 polymetallic, 373 veins, 391

sulfosalts, 310, 412 sulfur, 196, 240, 264, 421

bacteria, 421 cap rock, 422 deposits, 415 exploration, 415, 422 origin, 421 springs, 17

syenites, 77 synclines, 137, 138, 152, 190, 239 Tabasco, 1 Taberna Foramtion, 144, 145 Tacasneque, 159 tactites, 236, 241, 249, 254, 257, 406 Tajo sites, 127 Tala Tuff, 98, 101, 104, 105 talc, 240, 345, 346 Talpa de Allende Municipality, Jalisco,

355 talus

debris, 162 deposits, 85

Tamabra Limestone, 170 Taman Formation, 218 Taman Mixto, 318 Tamanzunchale, 159 Tamaulipas, 139, 240 Tamaulipas Formation, 80, 84, 131 Tamaulipas Island, 131 Tamaulipas Peninsula, 115, 131 Tamaulipas platform, 137 Tamaulipeco Geoanticline, 137 Taman Formation, 80 Tampico oil province, 1 Tampico-Misantla Basin, 135

Tamulipas, 159 Tancamichapa dome, 419 Tancamichapa Island, 417 Tapalapa, 96 tar sands, 112, 127 Taraises Formation, 115, 131, 279,

283 Tatatile iron mines, 354 Taxco deposits, 331 Taxco mining district, 379 Taxco-Zitacuaro Massif, 380 Taylor Group, 110 Tayoltita Mine, 219 Teapa, Chiapas, 327 Tecocoyunca Beds, 145 Tecocoyunca Group, 144, 145 Tecolote dike, 299 Tecomate-La Escondida area, 301 Tecomatlan, 159 Tecomatlan Conglomerate, 344 Tecomatlan deposit, 159 tectonics, 3, 62,150, 210, 288, 385

regional, 24, 79 salt, 418

tectonism, 19, 79, 146, 152, 157, 180, 269, 272, 318, 319

Tehuacan fault, 261 Tehuantepec Isthmus, 1 Tehuichila, 159 Tehuilo tepee, 379 Tejaluca deposit, 159 Tejamaniles, 65, 67, 68, 74, 75 Tejocjotes mines, 329 Tejon sector, 349 Telixtlahuaca, Oaxaca, 349 Telluric method, 66, 86 Tembabiche mine, 177 Temexalaco, 159 temperature, 89, 99, 109, 301, 393

bottom, 71, 105 Tempoal, 159 Tenamastepec zone, 86 Tenexpan sector, 349 Tepehuacan, Hidalgo, 315 Tepetates Formation, 179, 180, 186 Tepexic Formation, 80, 318 Tepeyac Mine, 403 Tepezala-Asientos district, 395, 396,

397 Tepic-Chapala graben, 96 Teposcolula Limestone Formation,

144, 146 Tequila complex, 96 Tequila Volcano, 96 Tequila Volcano flow, 99 Tercero mantos, 263 Temeras Mine, 278 Temeras vein system, 274, 275 Tertiary, 133,136,146,170, 244,

296, 358, 386 Tesist&n-Atemajac-Toluquillo aquifer,

99 Tetela gold deposits, 354 tetrahedrite, 218, 236, 301, 335, 358,

363, 375, 390, 392, 400, 412 tetrahedrite-tenantite, 360 tetravalent, 161 Tetzinda area, 320 Tetzintla pit, 318


438 Index

Texistepec dome, 415, 419, 423 Teziutlán, 77, 80 Teziutlán andesites, 80 Teziutlán Formation, 80, 84 Teziutlán Massif, 354 Tezoatlán area, 142, 145, 147 thermal spots, 15, 17 thermalism, 65 thermometry, 85,412 Tigres vein, 283 tin, 247, 252, 376 Tiro Altofault, 244 Tiro de Rayas, 403 Tiro General area, 387 Tiro General Mine, 283, 284, 285 Tiro Guanajuato, 405 Tiro hanging wall, 313 Tiro Valenciana, 403 titanium, 331, 349

reserves, 351 titanium oxide, 349 Tizapa, Mexico, 353

deposits, 377 sulfides, 373

Tizapa metamorphic sequence, 373, 377

Tlaltepingo Dam, 318 Tlanchinol, Hidalgo, 315 Tlapa deposit, 159 Tlaxiaco area, 142, 146, 147 Tlaxiaco Basin, 145 Tlaxiaco-Cuquila junction, 146 Tolimán canyon, 296, 298 Tomellín Canyon, 331, 343, 344 tonalites, 24 tonstein, 137 topaz, 247 topaz rhyolites, 247 Topia, Durango, 215 Topia Andesite, members, 218 Topia Mining District, 215 Torino fault, 261 Torino-Tehuacán chimney, 263 Torres-Cedros Mine, 413 Torres-Cedros Orebody, 405 Torres Mine, 412 tourmaline, 199, 201, 245, 247, 366 trachyte, 272, 274, 275 Trancas deposit, 162 transference, convective, 65 transgression, 140, 144, 147, 229,

279, 319 Trans-Mexican Axis, 318 Trans-Mexico Neovolcanic belt, 170 travertine, 133, 136 tremolite, 245, 254, 345, 346 Trest Virgenes group, 195 Triassic, 210,315 Trigonia, 150 Trinity Formation, 267 Tucophyllum texanus, 109 tuffs, 15, 59, 63, 80, 83, 84, 95, 147,

164, 170, 184, 189, 190, 195, 197, 201, 218, 272, 280, 283, 298, 336, 370, 377, 380, 385

andesite, 335, 365, 407 Faby, 84 flows, 148, 195 lithic, 386

rhyolite, 210, 244, 386, 406 Tala, 98, 101, 104, 105

Tulecheck, 15 Tulecheck geothermal zone, 16, 36 tungsten, 177, 265 Tupilco dome, 419 Turritella, 150, 184 Tuxpan region, 59 Tuzandepetl dome, 419 UF-1 Project, 165 uplift, 99, 150, 269, 318, 345, 397 Upper Fossiliferous Limestone

Member, 241, 248, 251 Upson Formation, 110, 117, 119,

132, 151 uranium, 4,161, 162, 194 Uvalde Gravel, 136 Valenciana Mine, 403, 412 Valenciana orebody, 408 Valles-San Luis Potosí Platform, 279 Val verde, 339 vanadium, 194, 252, 284 Vanquerías area, 140 Vega Chica, 79 vegetation, 109, 131, 133, 180

xerophyte, 195 Velardeña Mining District, 261, 269,

278 Venustiano Carranza Thermoelectric

Project, 107 Veracruz, 1, 77, 159 Verdosas anticline, 299 vertebrate remains, 186

marine, 190 vesuvianite, 263 Veta El Cobre, 280 Veta Madre deposit, 407 Veta Madre fault system, 407, 408 Veta Madre footwall, 406 Villalpando, 408 Villalpando Vein shoots, 408 volcanic ash, 189 volcanic cones, 78 volcanic series, 19 volcanics, 241 volcanism, 18, 24, 38, 63, 77, 80, 96,

133, 147, 152, 157, 177, 180, 318, 327, 356, 358, 370, 413

caldera, 80 pre-caldera, 80

volcanoes, 63, 78 Cerro Prieto, 23, 24 monogenetic, 78 mud, 17 Tequila, 96

water, 170 bicarbonate, 68, 87, 128 ground, 170 meteoric, 320 sources, 170 sulfate, 68, 87 wells, 5, 17

Webb County, Texas, 107, 142 wells, 42, 52, 59, 64, 84,127

Amexquite Norte, 420, 422, 423 CP-I-IV, 48, 51

development, 71, 73 discharges, 68 exploratory, 13,16, 23, 36, 71, 73,

89 geothermal, 28, 44, 87, 95 geothermal fields, 13 H-l-12, 84, 89, 92, 93, 104 Nopalapa, 420 PR-1-5, 95, 99, 101,104 production, 89,104 water, 5, 17

West Field, 241, 244, 245, 247, 251 Wilcox Formation, 140, 142 wolframite, 247 wollastonite, 263, 299, 309, 327,

328, 397 wollastonite tactites, 272 wood, 135 worm burrows, 184 Xalapazco-Mastaloya rea, 83, 85, 86 Xáltipan Ignibrite, 83, 84 Xilitla, 159 Xochicoatlan, Hidalgo, 315 Yahualica, 159 Yanhuitlán Formation, 146, 344 Yegua Formation, 142 Yucatán area, 416 Yucuñuti Formation, 144, 145 Zacatecas, 146, 229, 261, 381, 383,

395, 396 mines, 403

Zacatecas Formation, 279, 397 Zacatepec, 77 Zacazonapan, 373 Zacualpan, 369 Zacualpan Mining District, 369,370 Zacualtipan, 159 Zaragoza Ignibrite, 84 zeolites, 65, 104 Zimapán, Hidalgo, 295, 358 Zimapán District, 261, 298

deposits, 295 Zimapán valley, 296 Zinapécuaro, 59 zinc, 196, 200, 218, 225, 236, 240,

252, 264, 268, 272, 274, 286, 304, 309, 331, 333, 335, 337, 353, 356, 360, 363, 371, 373, 375, 377, 389, 391, 392, 395, 397, 400

deposits, 284 reserves, 399 sulfides, 335

zircon, 315 Zit'acuaro region, 59 Zona Nueva, 85 zones

ferrosalite-garnet, 232 geohydro logic, 170 geothermal, 15 saccharoid quartz, 232 tremolite-calcite, 232 tremolite-garnet, 232

Zorrillo Formation, 144, 145, 147 Zuloaga Group, 131 Zuloaga Limestone, 279, 280


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