Is Granite A Plutonic Intermediate Rock

Granite is a plutonic rock in which quartz makes up between 10 and 50 percent of the felsic components and alkali feldspar accounts for 65 to 90 percent of the total feldspar content.

Is granite a plutonic intermediate rock.

The name comes from two related rocks to which granodiorite is an intermediate. Pluton is the term used to describe a mass of plutonic rock. Mineralogically granite contains quartz various feldspars and micas. Granite is a felsic plutonic rock composing the base of most of the continental crust.

In igneous petrology an intermediate composition refers to the chemical composition of a rock that has 52 63 wt sio 2 being an intermediate between felsic and mafic compositions. Typical intermediate rocks include andesite dacite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks. There are about a dozen major plutonic rock types and many more less common ones. 1 intrusive rocks or plutonic rocks when magma never reaches the surface and cools to form intrusions dykes sills etc the resulting rocks are called plutonic.

Principal minerals feldspar quartz hornblende micas. Granodiorite is a plutonic igneous rock formed by intrusion of silica rich magma which cools in batholiths or stocks below the earth s surface. Principal textures generally massive hypidiomorphic granular sometimes porphyritic. A good example is granite which is a very hard plutonic rock.

The name for a particular plutonic rock depends on the mix of minerals in it. Metallurgical contentgranitepegmatiteaplitegraphic granite greisensyenitenepheline syenite dioritegabbronoritediabaseperidotitedunite or olivine rockkimberlite or. Felsic plutonic rocks granitoids characteristics. Plutons range in.

Cumulate textures are rare. It is usually only exposed at the surface after uplift and erosion have occurred. Si saturated to oversaturated. Thus a representative plutonic rock would be granite while representative in turn of volcanic rock would be basalt besides the difference between the large crystals of the former and the microscopic crystals of the latter they contrast markedly in color.

Therefore plutonic rocks have coarse grained crystals. Most common batholiths are quartz diorite tonalite granodiorite granite. Differences between plutonic and volcanic rocks are more complex and more revealing of the geological evolution of the earth. By quantity these are the by far most common rock types.

Applying this definition requires the mineral identification and quantification abilities of a competent geologist.