Petrological characterization of residual quartzites associated with kadavur anorthosite complex, Tamil Nadu, India

Kadavur Anorthosite Complex (KAC) is composed of undeformed plutonic intrusive emplaced into a complex structural set up made up of quartzite. Many more studies have been carried out on the KAC as it is a typical massive anorthositic pluton with its associated rocks ranging from gabbroic to anorthositic rock with chilled marginal contact with the structural quartzites. It is a convoluted geological terrain to delineate its genesis and lithological categorization. In the field the quartzites occur as compositional banding with gneissic fabrics and at places it has witnessed the recrystalline granulose texture. Here in this study a detailed field and petrological correlation have been carried out to understand its characterization and comprehensive lithological grades. The detailed petrological studies indicate that the quartzite type rocks can be classified petrologically with four distinct variations of rocks of its kind. The constituent minerals in the quartzite such as sillimanite, ferruginous minerals and mica group of minerals i.e biotite and muscovite are the prime factors for the classifications of the said rock.