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Authors
Affiliations
1 Department of Geology, University of Mysore, Manasagangotri, Mysore-570 006, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 65, No 4 (2005), Pagination: 403-410
Abstract
Chamockites from the Southern Granulite Terrane were considered to be product of regional high-grade metamorphism, aided by C02-rich and alkaline fluids. Here, we report the occurrence of intrusive charno-enderbites and charnockites around Dindigul, which consist of pyroxenes, plagioclase, alkali feldspar, quartz, biotite, titanomagnetite, ilmenite and apatite. These rocks are characterized by higher abundance of K2O, TiO2, and P2O5, and lower contents of CaO with lower m* for a given SiO2 content, relative to metamorphic charnockites from the Biligiri Rangan and Nilgiri granulites, and have the geochemical similarities with the Ardery charnockitic intrusions from Antarctica.
Keywords
Igneous charnockites, C-type magmas, Geochemistry, Dindigul, Tamil Nadu.
