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Igneous Charno-Enderbites and Charnockites (C-Type Magmas) around Dindigul, Tamil Nadu
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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.
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