classification and nomenclature of igneo
DESCRIPTION
geological engineeringTRANSCRIPT
The Occurrence
Classification of
Igneous Rocks
Color Index Chemical
content
Rock Texture
Based On
Noor (2008)
Classification Of Igneous Rocks
Plutonic/Intrusive Igneous Rock = frozen below the surface of the earth
Example : Granit, Diorit, Granodiorit, Syenit, Peridotit, etc.
Classification Based on Occurrence
Ma’waleda (2010)
Simon and Schuster (1988) Simon and Schuster (1988)
Hypabisal Igneous Rock = Freezes in a crack alley or the earth's crust
Example : Diabas, Aplit, Pegmatit, etc.
Volcanic/Extrusive Igneous Rock = Freezes on the surface of the earth
Example : Basalt, Riolit, Andesit, Trakit, Obsidian, etc.
Ma’waleda (2010)
Simon and Schuster (1988)
Simon and Schuster (1988)
Classification Based on Color Index
Classification Of Igneous Rocks
Name of Rock Color Index
(mafic mineral)
Example
Leucocratic Igneous
Rock
< 30 % mafic minerals Granit
Mesocratic Igneous
Rock
30 % - 60 % mafic
minerals
Diorit
Melanocratic Igneous
Rock
60 % - 90 % mafic
minerals
Gabro
Hypermalanic Igneous
Rock
> 90 % mafic minerals Peridotit
Ma’waleda (2010)
Classification Based on Chemical Content (SiO2)
Classification Of Igneous Rocks
Name of Rock Chemical Content (SiO2) Example
Acid Igneous Rocks > 66% Granit, Riolit
Intermediate Igneous
Rocks
52 – 66% Diorit, Andesit
Basic Igneous Rocks 45 – 52% Gabro, Basalt
Ultrabasic Igneous
Rocks
< 45% Peridotit, Picrite
Ma’waleda (2010)
Classification Based On Rock Texture
Phaneritic, the igneous rock composed almost entirely of minerals coarse Example : Granit, Gabro Porphyritic, the igneous rock composed of the mineral coarse and fine Example : Pegmatit, Granit porfiri Aphanitic, the igneous rocks are almost entirely composed of fine-sized mineral Example : Riolit, Basalt
Kaharuddin (1998)
Composition of Igneous Rocks
http://miningblogspotcom-mining.blogspot.com/2012/03/batuan.html
Classification of Igneous Rocks According to Geologists
Classification of Igneous Rocks According to Fenton Classification of Igneous Rocks According to Rosenbusch Classification of Igneous Rocks According to Russell B. Travis Classification of Igneous Rocks According to Hamblin and Howard
Kaharuddin (1998)
REFERENCE :
http://www.dakotamatrix.com, diakses pada tanggal 6 September 2014 http://id.wikipedia.org/wiki, diakses pada tanggal 6 September2014 http://geology.com/rocks.shtml, diakses pada tanggal 6 September2014 http://miningblogspotcom-mining.blogspot.com/2012/03/batuan.html, diakses pada tanggal 6 September2014 Kaharuddin,1998. Penuntun praktikum petrologi edisi ke 2. Ujung Pandang Ma’waleda, Musri.2010. Pengantar petrologi Batuan Beku. Makassar Noor, Djauhari.2008.Pengantar Geologi.Makassar. Simon and Schuster.1988.Rocks and Minerals.New York : A Fireside Book