Petrologi 1-siklus batuan

petropetrolologigi2 SKS teori2 SKS teori1 SKS praktikum1 SKS praktikum

by:by:hill. gendoet hartonohill. gendoet hartono

Semester 2, 2008-2009Semester 2, 2008-2009

Senin, jam 09.50 – 10.40Senin, jam 09.50 – 10.40 jam 10.45 – 11.35jam 10.45 – 11.35

Grading:Grading:20 % quizzes and task20 % quizzes and task30 % mid test30 % mid test50 % final test50 % final test

Hari/TglHari/Tgl Materi yang diajarkanMateri yang diajarkan Remark Remark

Senin/16-2-2009Senin/16-2-2009 PENDAHULUANPENDAHULUAN

Berisi tentang latarbelakang, difinisi, kedudukan Berisi tentang latarbelakang, difinisi, kedudukan petrologi di dalam geologi dan siklus batuanpetrologi di dalam geologi dan siklus batuan

Senin/23-2-2009 Senin/23-2-2009 dan 2-3-2009dan 2-3-2009

GENESIS MAGMAGENESIS MAGMA

Berisi tentang asal usul magma, siklus batuan, dan Berisi tentang asal usul magma, siklus batuan, dan batuan beku dan gunung api, karakteristik batuanbatuan beku dan gunung api, karakteristik batuan

2x pertemuan2x pertemuan

Senin/Senin/99-3-2009 -3-2009 dan 16-3-2009dan 16-3-2009

MINERAL PEMBENTUK BATUANMINERAL PEMBENTUK BATUAN

Berisi tentang seri Bowen, klasifikasi, pemerian Berisi tentang seri Bowen, klasifikasi, pemerian batuan beku dan batuan gunung api, genesisnyabatuan beku dan batuan gunung api, genesisnya


21-30 Mar 21-30 Mar 20092009

Ujian Tengah SemesterUjian Tengah Semester

T.A. 2008-2009T.A. 2008-2009



TThhee RRoocckk CCyycclle e iin n SSTTNATTNASS

What is tWhat is thhee

RRoocckk CCyycclle ?e ?

The RRoocck k CCyycclle e explains how RocksRocks and Natural ProcessesNatural Processes

are related

weathering

melting

pres

sure

, hea

t

Sedimentary Metamorphic

Igneous

is a sequence of events involving the

formation, alteration, destruction, and reformation of rocks as a result of natural processes ...

Glossary of Geology, Bates & Jackson, AGI

RRoocckk CCyycclleeA more traditional definition is:

TheRockCycle

The Rock Cycle

The Rock Cycle

• Mineral - a naturally occuring, solid, inorganic substance with a definite chemical composition and molecular structure.

• Rock Forming Minerals - there are 2,500 minerals, 90% of all rocks are made from just 15 of these minerals.

The Rock Cycle

• Sedimentary Rock - formed from sediments.–Characteristics include:

• distinct layers• fragments/pieces of other rocks• organic composition (fossils)• range in particle size -OR- mostly one sized particles.

The Rock Cycle

• Non-Sedimentary Rock - formed by heat and pressure. These rocks are known as igneous and metamorphic rocks.

• Igneous Rock - visible crystals

• Metamorphic Rock

–“banding” - parallel lines made by crystals

–bent or folded lines of crystals

–foliation - crystals line up in 1 direction

We will use the graphic seen in the background to help

represent the RRoocck k CCyycclle.e.

There are many ways to show the various relationships between the rocks and

the related natural processes.

let’s review some basic information …

Before we look at the

RRoocck k CCyyccllee

in detail,

The RRoocck k CCyyccllee involves the recognition of three main classes of rocks. All three types are found in Yogyakarta

The three rock types are …

CEMETERYCEMETERY METABOLICMETABOLIC

INGENIOUSINGENIOUS

SedimentaryRocks

MetamorphicRocks

IgneousRocks Right?Right?

The eminent 18th century lawyer, doctor, gentleman farmer and founder of modern geoscience,

James HuttonJames Hutton, developed the concept of the RRoocck k CCyyccllee to show how rocks and natural, physical processes are interrelated.

The understanding of the world in the 18th century was different from today …

Hutton knew about solar energy and gravity at the surface. He did not know about radioactive heating from inside the earth.

As a result, the RRoocck k CCyyccllee

will be self-sustaining for thousands of millions of years.

Solar energy, gravity and radioactive heating are the major forces driving the RRoocck k CCyyccllee.

How does an antique concept like the RRoocck k CCyyccllee hold up in light of contemporary data and scientific thinking?

Of special interest is Plate Tectonics.

The mantle, crust and surface of the earthcan be thought of as a giant recycling machine;rocks are neither created nor destroyed, but redistributed and transformed from one rock type to another.

IM

S

E:\kuliah-S1\Petrologi\show\module05swf.swf

If you were to ask a geologist what the earth is …

What do you think theresponse would be?

Diagram of the Interior of the EarthCrust

0 to 40 km 0°C

Upper Mantle40 to 670 km

1,000°C

Lower Mantle670 to 2,890 km

2,000°C

Outer Core2,890 to 5,150 km

3,700°C

Inner Core5,150 to 6,370 km

4,300°C

E:\earth quake\earthquake_guide3.swf

lets move to some of the smallest components of Geology …

Now that we better understand the largest components of Geology …

.

Minerals make up rocks.

Natural compounds and elements combine to form minerals.

Elements combine to form the natural compounds.

Rocks make up the Earth.

There is a hierarchy to the elements of Geology

Atoms make up elements.

Elements can be arranged, based on their identifiable properties, into the Periodic Table

Atomic Theory proposes that all matter is composed of the atoms of about 100 different chemical elements. It further proposes that chemical compounds are formed by the combination of the atoms of different chemical elements.

Only eighteight elements make up over 98%

of the earth’s crust!

Mg

Na

K

OSiAl

FeCa

.

Minerals make up rocks.

Natural compounds and elements combine to form minerals.

Elements combine to form the natural compounds.

Rocks make up the Earth.

There is a hierarchy to the elements of Geology

Atoms make up elements.

What are Minerals? How can we tell what they are?

The identifiable The identifiable

characteristics ofcharacteristics of MineralsMinerals areare

naturally occurring inorganic elements or naturally occurring inorganic elements or compoundscompounds

having an orderly internal having an orderly internal structurestructure

and a characteristic chemical and a characteristic chemical compositioncomposition,

crystal form andcrystal form and

physical properties of a physical properties of a solidsolid

There are over There are over 300300 minerals minerals

found in Michigan.found in Michigan.

alunite, amethyst, amphibole, analcite, anatase, andalusite, andesine, andradite, anglesite, anhydrite, ankerite, annabergite, anorthite, anthonyite, anthophyllite, anthraconite, anthraxolite, antigorite, apatite,

aphrosiderite, apophyllite, aragonite, ardennite, argentoalgodonite, arsenopyrite, asbestos, atacamite, attapulgite, augite,awarurite, axinite, azurite, babingtonite, baddeleyite, barite, bassetite, bastnaesite,

beaconite, beryl, biotite, bismuthinite, blomstrandine, bornite, bowlingite, brannerite, braunite, brochantite, bronzite, brookite, brucite, brunsvigite, buttgenbachite, byssolite, bytownite, calciovolborthite, calcite,

calderite, calumetite, carnallite, carnelian, celadonite, celestite, cerargyrite, chabazite, chalcedony, chalcocite, chalconatronite, chalcopyrite, chalcotrichite, chamosite, chert, chloanthite, chlorargyrite,

chlorastrolite, chlorite, clinochlore, clino-chrysotile, clinozoisite, collophane, columbite, copiapite, copper, coquimbite, cordierite, corrensite, corundum, covellite, crocidolite, cubanite, cummingtonite, cuprite,

dahllite, datolite, daubreelite, delessite, diabantite, diallage, diamond, dickite, digenite, dihydrite, diopside, dioptase, djurleite, dolomite, domeykite, forsterite, francolite, freirinite, fuchsite, fulgurite, galena, garnet,

garnierite, gersdorffite, gibbsite, glauconite, goethite, gold, halite, halloysite, halotrichite, harmotome, heterosite, heulandite, hisingerite, hollandite, hornblende,

hyacinth, hydrocarbon, hydrohausmannite, hydromica, hydromuscovite, hydrotroilite, hypersthene, iddingsite, illite, ilmenite, isle royale greenstone, jacksonite, jacobsite, jasper, jaspilite, julgoldite, kamacite,

kamiokite, kaolinite, kearsargeite, keweenawite, kinoite, koutekite, kupfferite, kutnahorite, kyanite, labradorite, langite, laumontite, lavendulan, lead, lechetelierite, ledouxite, leonhardite, lepidocrocite, lepidolite, manganoan siderite, manganocalcite, marcasite, margarite, marmolite, martite, masonite,

maucherite, melaconite, melanochalcite, melanterite, melilite, mercury, mesolite, meta-autunite, metatorbernite, metatyuyamunite, microcline, millerite, minnesotaite, mirabilite, mohawk-algodonite,

mohawkite, molybdenite, monazite, montmorillonite, muscovite, nacrite, nantokite, natrojarosite, natrolite, neltnerite, neotocite, niccolite, nontronite, oligoclase, oligonite, olivenite, olivine, orientite, orthoclase,

ottrelite, palygorskite, paragonite, paramelaconite, pararammelsbergite, paratacamite, pargasite, patricianite, paxite, pectolite, pennine, pentlandite, peristerite, perthite, pharmacolite, phengite, phillipsite,

phlogopite, phosphides, phosphorite, picrolite, picropharmacolite, pigeonite, pistacite, pitchblende, plagioclase, plancheite, plessite, polyhalite, posnjakite, powellite, prehnite, priorite, prochlorite,

protolithionite, pyrolusite, pyrope, pyrophyllite, pyrostilpnite, pyroxene, pyrrhotite, quartz, rammelsbergite, rauenthalite, rhodochrosite, rhodonite, riebeckite, ripidolite, roscoelite, rubellan, rutherfordine, rutile,

salite, salt, sanidine, saponite, saussurite, scapolite, scheelite, schefferite, schorl, schreibersite, scolectite, seamanite, semi-whitneyite, sericite, serpentine, siderite, silicon, sillimanite, silver, smaltite, smectite,

soapstone, specularite, spessartite, sphalerite, sphene, spinel, spodumene, staurolite, steatite, stellerite, stibiodomeykite, stilbite, stilpnomelane, stinkstone, strontianite, sulfur, sussexite, sylvanite, sylvite,

synchisite, szaibelyite, taenite, talc, tantalite, tellurium, tenorite, tetrahedrite, thomsonite, thuringite, tirodite, titanite, titanomagnetite, topaz, tourmaline, tremolite, trichalcite, tridymite, troilite, tyrolite,

uralite, uraninite, uranothorite, uvarovite, vaterite,, vesuvianite, violarite, viridite, vivianite, vladimirite, wairakite, whitneyite, williamsite, wollastonite, wurtzite, xanthosiderite, xonotlite, zeolite, zircon, zoisite,

zonochlorite

Each mineral has its own set of uniquely

identifiable properties or characteristics

MineralsMinerals combine to form combine to form

RocksRocks

Some RRoocckkss are made up of just one

mineral - like the sedimentary rock salt (made up of the mineral halite) that is mined near Detroit.

Others RRoocckkss are made up of many minerals - like the igneous rock

granite and the metamorphic rock

gneiss, found near Marquette.

Now that some of the basicshave been covered, letsconsider some of the

details about the

RRoocckk CCyyccllee

The RRoocck k CCyyccllee

weathering


Igneous

Rocks are weathered,eroded,transported,deposited,and lithified to formsedimentary rocks

The igneous rock granite canbe physically weathered to produce clay and sand.

Becoming a SEDIMENTARY ROCK …

Sand can become sandstone.

Clay can become shale

These sediments can be transported deposited and lithified to form sedimentary rocks.

The metamorphic rock gneiss can be physically weathered to produce clay and sand.


Sand can become sandstone.

Clay can become shale

These sediments can be transported deposited and lithified to form sedimentary rocks.

Sedimentary rocks can be physically weathered to produce sediments that can become other sedimentary rocks.


Chemical weathering dissolves the minerals in rocks. The resulting dissolved compounds could form evaporites like rock salt or rock gypsum or chemical precipitates like some kinds of limestones. What forms depends upon composition and depositional environment factors.

H2O + CO2 H2CO3

2KAlSi3O8+ 2H+ + H2O Al2Si2O5(OH)4+ 2K+ + 4SiO2



melting


Igneous

Igneous Rocksform from molten rock or magma in the subsurface or from lava extruded at the surface

Becoming an IGNEOUS ROCK …

When magma cools to a solid it becomes an igneous rock.

Molten rock is called magma.

Any existing rock – igneous, metamorphic or sedimentary - can be subjected to enough heat and or pressure causing it to melt.

The kind of igneous rock formed depends on what was melted and how it cooled.

Igneous rocks are classified based on their mineral composition and texture.

basaltgranite

granodiorite

rhyolite

pegmatite

Igneous rocks found in Michigan include:

pres

sure

, hea

t


Igneous


Pressure, Pressure, heatheatand fluidsand fluids cause preexistingrocks or sediments to becomemetamorphic metamorphic rocksrocks

Becoming a METAMORPHIC ROCK …

When the prefix meta is applied to a rock name that means that the original rock has been metamorphosed.

If the igneous rock basalt is exposed to sufficient heat and or pressure it can be transformed into the metamorphic rock call metabasalt


If the sedimentary rock sandstone is metamorphosed it can become the metamorphic rock quartzite.

If the sedimentary rock limestone or dolomite is metamorphosed it can become the metamorphic rock marble.

If the sedimentary rock shale is metamorphosed it can become the metamorphic rock slate.


If the metamorphic rock phyllite is metamorphosed it can become the metamorphic rock schist.

If the metamorphic rock slate is metamorphosed it can become the metamorphic rock phyllite

If the metamorphic rock schist is metamorphosed it can become the metamorphic rock gneiss.

weathering

melting

pres

sure

, hea

t


Igneous



does not go in just one direction. Any given rock can go through any part of the cycle any number of times.

DEQ GSD - The Rock Cycle in Michigan - February 2001

weathering

melting

pres

sure

, hea

t


Igneous


I hope you better understand the RRoocck k CCyyccllee

and what it means.

DEQ GSD - The Rock Cycle in Michigan - February 2001

Please email any comments about this program to Hill G. Hartono: [email protected] - thanks

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