GEOLOGY AND PETROGRAPHY OF APLITES AND GRANITES OCCURRED IN AND AROUND KOTTAGUDAM AND TOOPRANPET VILLAGES OF HYDERABAD GRANITE REGION, PENINSULAR INDIA

One of Largest granitic pluton of Indian subcontinent is Hyderabad Granitic Region (HGR) consists 2.5 billion years aged wide variety of intrusive felsic rocks. This region was apparently formed due to extensive lower crustal remelting of permobile phases of older (3.3-2.9Ga) gneisses (Divakara Rao, 1996). Several studies on these granites revealed that the pink granite is derivative of metasomatism of potash feldspar from grey granite (Balakrishna 1964 and Kanungo et al., 1975). Study area in and around Kottagudam and Toopranpet cropped out by pink granites, aplites formed as cap rocks on it. This paper is an attempt to understand the relations between aplites and pink granites.