S Type Granite

They are recognized by a specific set of mineralogical geochemical textural and isotopic characteristics.
S type granite. Allanite is a. Amphibole and pyroxene are more common in i type granitoids. Petrographic features are representative of the chemical. Other articles where s type granite is discussed.
I type granite formed by the igneous and s type granite formed by melting of metasedimentary rocks. Learn more about the properties and uses of granite in this article. Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar. Zircon and apatite can occur in both i and s type granites whereas titanite sphene and allanite are considered diagnostic accessory minerals for i type granites.
Hornblende crystals can be twinned and compositionally zoned. Hornblende is a typical i type granite mineral which never occurs in s type granite. High amounts of na2o and s type granitoids derived from sedimentary protoliths and containing high amounts of al2o3 and relatively low amounts of na2o. Amphibole and pyroxene are more common in i type granitoids while s type granitoids may have garnet cordierite and sillimanite.
If they are generated from different continental settings and from different magma so can we see. It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth.