1. petrologi [TGS7208] 2 SKS teori 1 SKS praktikum Semester 2, 2017-2018
by:
hill. gendoet hartono

2. UTS UAS Siklus Batuan, Kontrak Kuliah, Kelulusan, & Praktikum
Magma, Diferensiasi, Viskositas, Gas dan Komposisi
Batuan Beku, Intrusi Dalam & Karakteristiknya
Batuan Gunung Api, Intrusi Dangkal & Karakteristiknya
Batuan Gunung Api, Lelehan, Letusan & Karakternya
Klasifikasi Batuan Beku & Gunung Api
Batuan Alterasi
UTS
Batuan Sedimen, Jenis & Proses Pembentukan
Batuan Sedimen Silisiklastika
Batuan Sedimen Karbonat
Klasifikasi Batuan Sedimen
Batuan Metamorf, Jenis & Proses Pembentukan
Batuan Metamorf Derajat Rendah, Menengah & Tinggi
Klasifikasi Batuan Metamorf
UAS

3. Minerals to Rocks: Major Rock Groups

4. Intrusive Rocks:
Intrusive rocks are formed when magma crystallizes beneath the earth's surface. Depending on the depth of formation, intrusive rocks are divided into two groups: (1) plutonic rocks, and (2) hypabyssal rocks.
Plutonic Rocks - Rocks crystallized at great depths are called "plutonic rocks". A magma which is deeply buried in the earth's crust. Cools slowly with the retention of the volatiles. As a result the mineral constituents crystallizing from it have time to grow to considerable size giving the rock a coarse grained texture.
Hypabyssal Rocks-hypabyssal rocks are formed when magma solidifies close to the earth's surface. These rocks occur as injections within the country rocks. Their textures are usually finer grained than those of plutonic rocks but coarser than those of volcanic rocks. The hypabyssal rocks commonly show porphyritic texture.

5. Pembentukan batuan gunung api (Hartono, 2010)

6. BATUAN GUNUNG API/
INTRUSI DANGKAL

7. Subvolcanic rock
A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that originates at medium to shallow depths within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic and plutonic rocks. Subvolcanic rocks include diabase (also known as dolerite) and porphyry.
Definition of hypabyssal
: of or relating to a fine-grained igneous rock usually formed at a moderate distance below the surface
Dictionary

8. A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that is emplaced at medium to shallow depths (>2 km) within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic and plutonic rocks. Subvolcanic rocks include diabase (also known as dolerite) and porphyry.
An igneous rock that has risen from the depths as magma but solidified mainly as such minor intrusions as dikes and sills.
From Wikipedia, the free encyclopedia

10. Lens-shaped Intrusions Amygdaloidal structure
Forms and Structures of Igneous Rocks
Intrusive Structures
Extrusive Structures
Sheet Intrusions
Lens-shaped Intrusions
Cone-sheet,
Ring Dikes
Subjacent
Plutons
Lava Plateau
Volcanic Cone
Laccolith
Batholith
Ropy lava
Vesicular structure
Dikes
Sills
Phacolith
Stock
Columnar Jointing
Lopolith
Diapirs
Pillow lava
Block lava
Amygdaloidal structure

11. Intrusive Rock Bodies Volcanic neck
Shallow intrusion formed when magma solidifies in throat of volcano
Dike
Tabular intrusive structure that cuts across any layering in country rock
Sill
Tabular intrusive structure that parallels layering in country rock
Pluton
Large, blob-shaped intrusive body formed of coarse-grained igneous rock, commonly granitic
Small plutons (exposed over <100 km2) are called stocks, large plutons (exposed over >100 km2) are called batholiths

13. Intrusive Igneous Rocks Exposed
Shiprock California

16. A DYKE OF INTRUSIVE IGNEOUS ROCK CROSS-CUTTING SEDIMENTARY ROCK LAYERS

17. SILL
IGNEOUS SILL INTRUDED BETWEEN LAYERS OF SEDIMENTARY ROCKS

18. G. Muria

19. G. Galunggung
Retas di dalam tubuh
gunung api

20. G. Muria

22. G. Tengger

23. G. Krakatau

32. Sketches illustrating positions of shallow magma bodies inside volcanic edifices before the blasts: Bezymianny — combination of dome and cryptodome; Mount St Helens — cryptodome; Soufrière Hills, Montserrat — dome. Positions of bulged slopes and rupture surfaces of large-scale landslides are shown relative to the magma bodies. At Harimkotan (1933) and Shiveluch (1964), magma was deeper at the moment of landsliding, and thus lateral blasts did not occur 

33. Cliff section of a dacite cryptodome, showing well-developed radial columnar jointing. Kayak for scale.

36. See You….Soon