Study of Muscovite from Pelitic Schist of Doda Area, District Doda, Jammu and Kashmir, India

Abstract

Muscovites separated from pelitic schists of the Dada area show a limited range of composition between ideal muscovite and ferrimuscovite. The paragonite content in the muscovites ranges between 14 and 21 %. The tetrahedral Al^iv increases with the increase in the grade of metamorphism though this increase is more for the muscovite of the aureole rock, i.e., in the andalusite to staurolite zone than in the kyanite-staurolite zone. Similar results are also shown by the (FeO+Fe₂O₃) and Na/(Na+K) with respect to AI₂O₃ and total Al respectively.