Some new observations on the Amritpur Granite Series, Kumaun Lesser Himalaya, India

The Precambrian Amritpur Granite Series (AGS) in the Kumaun Lesser Himalaya is a composite body of three distinct types, viz, Porphyritic Amritpur Gra nite (PAG), Equigranular Amritpur Granite (EAG) Amritpur Porphyry (AP) and extends for a length of 60 km, Signature of Precambrian, pre-Himalayan cont act metamorphism in addition to the Himalayan regional metamorphism (greens chist to lower amphibolite facies) and subsequent retrograde metamorphism a re observed in the AGS, The authors have provided definite evidence for a c ontact aureole zone around AGS in the east of Hairakhan, NE of Durgapipal a nd Chandadevi and reported the xenoliths of PAG and EAG types in AP at Jamr ani indicating a younger age of AP.