Ir. Untung Suryanto, M.Sc

Semester II/2016

Silabus PetrologiFakultas Sumber Daya Alam dan Lingkungan UIN Syarif HidayatullahProgram Studi Teknik Geologi - TeknikPertambanganMata kuliah PetrologiJumlah SKS 3 SKSDiskripsi mata kuliahMempelajari proses-proses yang menghasilkan batuan (b.beku,sedimen dan metamorf), mempelajari cara mendeskripsi setiap jenis batuan dan interpretasi kemungkinan pembentukannya berdasarkan pengamatan megaskopik. Pengetahuan tentang dasar klasifikasi setiap jenis batuan, mempelajari kemungkinan hubungan setiap jenis batuan di lapangan.Tujuan1. Memahami konsep batuan sebagai bagian dari litosfer, batuan (jenis batuan, tekstur, mineralogi,

genesa secara umum);2. Mengetahui cara mendeskripsi batuan secara megaskopis (tekstur, struktur, mineralogi)3. Memahami proses pembentukannya/ genesanya sebatas kenampakan tersebut.Daftar pustaka 1. Ehlers,E., Harvey Blatt , 1982. Petrology Igneous, Sedimentary, and Metamorphic, Freeman, 732p.. 2. Tucker, Maurice E., 2001. Sedimentary Petrology, An Introduction to the Origin of Sedimentary

Rocks. Blackwell Science Ltd., 286p.

Rencana studiNo Sasaran pembelajaran Topik yang dibahas

1 PENDAHULUAN - Definisi/cakupan ilmu petrologi, kegunaan.- Perulangan tentang bumi dan lapisan-lapisan

pembentuknya.- Definisi magma, definisi batuan, jenis batuan, definisi

batuan plutonik, volkanik. 2 BATUAN BEKU - Diferensiasi magma, macam-macam diferensiasi3 BATUAN BEKU - Diagram fase : definisi,kegunaan

- macam-macam diagram fase :- Inikomponen, bikomponen (sistem biner)

4 BATUAN BEKU - Pembahasan sistem inikomponen & Sistem biner (2 komponen dengan titik eutektik);contoh mineral dan incongruent melting

5 BATUAN BEKU - Macam-macam batuan beku (berdasarkan tempat terbentuknya) :

- Batuan beku intrusive,ekstrusiv. 6 BATUAN BEKU - Struktur dan tekstur batuan beku7 BATUAN PIROKLASTIK - Batuan piroklastik : definisi, macam-macam endapan

piroklastik8 BATUAN PIROKLASTIK - Macam-macam endapan piroklastik (lanjutan)

- Klasifikasi batuan piroklastik

9 UJIAN TENGAH SEMESTER - Bahan batuan beku (termasuk batuan piroklastik10 BATUAN SEDIMEN NON KARBONAT - Proses pembentukan batuan

- Sedimen- Struktur sedimen

11 BATUAN SEDIMEN NON KARBONAT - Batuan sedimen klastik halus (batulempung,serpih,batulumpur)

- Batupasir (batuan sedimen klastik - sedang/menengah- batuan sedimen klastik kasar (konglomerat, breksi)

12 BATUAN SEDIMEN NON KARBONAT - Batupasir : klasifikasi, diagenesis, provenan 13 BATUAN SEDIMEN KARBONAT - Definisi batuan karbonat,komponen pembentuk

batuan karbonat, macam-macam batuan karbonat- Diagenesis batuan karbonat

14 BATUAN METAMORF - Definisi, konsep fasies, seri fasies- Macam-macam matamorf/batuan metamorf

16 BATUAN METAMORF - Dinamo-termal- Dinamo- Termal

17 UJIAN AKHIR SEMESTER - Bahan : batuan sedimen dan metamorf

PETROLOGY AND ITS DEFINITION Petrology (from Greek: petra, rock; and logos, knowledge) is the branch of GEOLOGY that studies rocks, and the conditions in which rocks form.

The subject matter of PETROLOGY consists the origin, association, occurrence, mineral composition, chemical composition, texture,structure,physical properties, etc., of rocks .

Whereas PETROGRAPHY deals with the descriptive part of rocks and PETROGENY deals with the mode of formation of rocks. These two together makeup Petrology.

GEOLOGICAL CLASSIFICATION OF ROCKS

The rocks are classified in various ways based on different principles such as Physical, Chemical ‘n’ Geological Classifications. Among the different classifications. Geological classification of rocks is the most proper because grouping of rocks is more logical , less ambiguous, orderly and comprehensive.

The Geological classification of rocks is based on their MODE OF ORIGIN. They are –

1) IGNEOUS ROCKS2) SEDIMENTARY ROCKS and3) METAMORPHIC ROCKS.

IGNEOUS ROCKS These are primary rocks,Most

abundant rocks in the earth’s crust.

These are formed at a very high temperature and pressure conditions directly as a result of solidification of magma or lava.

MAGMA: The term magma is applied when the melt is underground.

LAVA: The melt when it reaches the earth’s surface and flows over it, is called lava.

SOME IGNEOUS ROCKS

COOLING OF LAVA

SEDIMENTARY ROCKSSediments are the

products of weathering. Since these are secondary materials(i.e., derived from pre-existing rocks), the rocks formed out of them are called sedimentary or secondary rocks.

The origin of sedimentary rocks is totally related to the weathering influence on rocks.

sedimentary rock

METAMORPHIC ROCKS

Metamorphism literally means change.

The change in pre-existing rocks under the influence of temperature, pressure and chemically active solutions.

The metamorphic rocks formed from igneous rocks are called Orthometamorphic rocks and those formed from sedimentary rocks are called Parametamorphic rocks.

Quartzite

TEXTURES OF IGNEOUS ROCKSTextures based on

the

1) Degree of Crystallinity

2)Granularity and3)Shapes of

Crystals.