If they are generated from different continental settings and from different magma so can we see.
I type granite definition.
The word granite is used in a variety of ways by different people.
Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock.
Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.
I type granite is al 2 o 3 na 2 o k 2 o cao 1 1.
Like other granites phenocrysts in i type granites are commonly feldspars but can also be hornblende.
Definition igneous rocks with equigranular texture having mineral compositions as follows.
Both types of granitoids may also contain biotite.
Granite definition a coarse grained igneous rock composed chiefly of orthoclase and albite feldspars and of quartz usually with lesser amounts of one or more other minerals as mica hornblende or augite.
Other articles where s type granite is discussed.
A simple definition is used in introductory courses.
Quartz in felsic minerals 10 60 vol plagioclase in feldspar 10 65 vol.
A more precise definition is used by petrologists geologists who specialize in the study of rocks.
High amounts of na2o and s type granitoids derived from sedimentary protoliths and containing high amounts of al2o3 and relatively low amounts of na2o.
I type granites like other granite types can vary in crystal size from aphanitic to phaneritic.
Crystal size distributions include porphyritic seriate and rarely equigranular textures.
Amphibole and pyroxene are more common in i type granitoids while s type granitoids may have garnet cordierite and sillimanite.