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Authors
Affiliations
1 Geological Survey of India, Jhalana Dungri, Jaipur, IN
2 Geological Survey of India, Aliganj, Lucknow, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 44, No 1 (1994), Pagination: 17-25
Abstract
The concordantly emplaced polyphase granite suite exposed in the Champawat area of Pithoragarh district of Uttar Pradesh represents a part of the southernmost granitoid belt of Himalayan region. In the field it can be divided into four successive mappable phases, viz. biotite granite, grey granite, leucogranite and microgranite. Mineralogically the biotite granite and grey granite are classified as "granodiorite" while the leucogranite and microgranite are classified as "granite". All these varieties of granite show xenoliths of country rocks. Champawat granite suite is a well differentiated, polyphase, calc-alkaline, peraluminous, S-type granitoid batholith that ranges in composition from granite to granodiorite- adamellite and trondhjemite. It is interpreted to be the product of anatexis of supracrustals at middle to lower crustal levels. The geochemical discriminant diagrams of the Champawat granite suite suggest that it is an orogenic granite showing characters of continental collision environment.
Keywords
Igneous Petrology. Granite, Champawat, Himalayas, Uttar Pradesh.
