Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

B. Mahabaleswar ¹, K. S. Anantha Murthy ¹, M. Basavanna ²

Affiliations
1 Department of Geology, Bangalore University, Bangalore, IN
2 Depat1ment of Geology, Karnataka University, Dharwad, IN

Abstract

Through a consideration of major element chemistry it is inferred that the orthopyroxenes and clinopyroxenes of the iron formations are ferrohypersthene and ferroaugite respectively, whereas the garnets belong to pyralspite series. The opx and garnets are rich in Mn content, which may be due to bulk composition of the host rock and oxygen fugacity. The P-T estimates give values of 7.5 to 8 Kbars and 607°C to 657°C.

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