Alkali Feldspar Granite

Alkali Feldspar Granite. A lightcoloured granitoid (a coarse grained igneous rock composed mostly of quartz alkalifeldspar and sodic plagioclase ) where plagioclase is less than 10% of the total feldspar on the QAPF diagram Hide all sections | Show all sections Classification of Alkalifeldspargranite Hide Rock Igneous rock Normal crystalline igneous rock.

PDF file30 alkali feldspar granite from the Zhanbuzhale region The zircon U–Pb ages indicate 31 that the granodiorite and alkali feldspar granite formed at 239 and 236 Ma 32 respectively The granodiorites are high – K calc – alkaline metaluminous high Sr 33 content high Sr/Y ratios low Y content which show adakitelike affinities.

Alkali Feldspar Granite Rock History Origin

In granites alkali feldspars usually have bulk compositions in the range Ab 3010 Or 70–90 Coherent exsolution leads to straight ‘film’ lamellae ( Fig 16 at the right and Fig 18 A) which are long thin lenses close to the plane 6 ¯ 01.

Alkalifeldspargranite: Mineral information, data and

A subgroup of the Feldspar Group poor in calcium and mostly rich in potassium It is mostly used in petrology for the high temperature series from sanidine to high albite the series is incomplete at low temperature but normal albite orthoclaseand microclineare generally.

Nirupam Granite – Luxury Stones for Home Decor

Granite is a coarsegrained intrusive igneous rock composed mostly of quartz alkali feldspar and plagioclase It forms from magma with a high content of silica and alkali metal oxides that slowly cool and solidify underground.