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

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Mineral Chemistry and P-T Conditions of Formation of A Basic Scapolite-Garnet-Pyroxene Granulite from Doddakanya, Mysore District


Affiliations
1 Department of Studies in Geology, Karnatak University, Dharwad 580003, India
2 Instituut voor Aardwerenschappen, Vrije Universiteit, Postbus 7161,1007 MC Amsterdam, Netherlands
     

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Electron microprobe analyses of coexisting phases in a basic scapolite-garnet-hornblende-two-pyroxene granulite from a Sargur supracrustal enclave near Doddakanya are presented. The results of various mineral geothermometers and geobarometers indicate temperature and pressure conditions of 810±20°C and 9.5 ± 0.5 kbar during metamorphic reequilibration. A comparison with other data from granulites of southern India shows that granulite-facies metamorphism of relatively high pressure is a common feature of the granulite region of the Archaean shield.
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  • Mineral Chemistry and P-T Conditions of Formation of A Basic Scapolite-Garnet-Pyroxene Granulite from Doddakanya, Mysore District

Abstract Views: 177  |  PDF Views: 3

Authors

T. C. Devaraju
Department of Studies in Geology, Karnatak University, Dharwad 580003, India
J. J. M. M. M. Coolen
Instituut voor Aardwerenschappen, Vrije Universiteit, Postbus 7161,1007 MC Amsterdam, Netherlands

Abstract


Electron microprobe analyses of coexisting phases in a basic scapolite-garnet-hornblende-two-pyroxene granulite from a Sargur supracrustal enclave near Doddakanya are presented. The results of various mineral geothermometers and geobarometers indicate temperature and pressure conditions of 810±20°C and 9.5 ± 0.5 kbar during metamorphic reequilibration. A comparison with other data from granulites of southern India shows that granulite-facies metamorphism of relatively high pressure is a common feature of the granulite region of the Archaean shield.