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

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Pressure - Temperature Estimates of the Iron Formations of Sivasamudram Area, Karnataka


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

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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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  • Pressure - Temperature Estimates of the Iron Formations of Sivasamudram Area, Karnataka

Abstract Views: 162  |  PDF Views: 5

Authors

B. Mahabaleswar
Department of Geology, Bangalore University, Bangalore, India
K. S. Anantha Murthy
Department of Geology, Bangalore University, Bangalore, India
M. Basavanna
Depat1ment of Geology, Karnataka University, Dharwad, India

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.