Granulites of Bhopalpatnam and Kondagaon belts, Bastar craton, MP: Petrological and fluid inclusion studies

Narasimha, K.N.P. and Janardhan, A.S. and Mishra, V.P. (1996) Granulites of Bhopalpatnam and Kondagaon belts, Bastar craton, MP: Petrological and fluid inclusion studies. Journal of Southeast Asian Earth Sciences, 14 (3-4). pp. 221-229.

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Official URL: https://doi.org/10.1016/S0743-9547(96)00060-8

Abstract

The Bhopalpatnam and Kondagaon granulite belts (BGB, KGB) occur surrounding the Bastar craton of central India. This paper deals with the geology, mineralogy and the fluid characteristics of these two belts. The geology of the two belts indicate that they abound in metasedimentary swathes. The metamorphic P-T conditions of the BGB range from 6 to 9 kbar at temperatures of 750 degrees C, whilst those of the KGB vary from 4 to 6 kbar at temperatures of 700 degrees C. The BGB shows an IBC path, while the KGB exhibits a dominant ITD path. These trends, based on mineral chemistry, are corroborated by fluid-inclusion studies. The lithologies of the BGB exhibit high-density CO2 inclusions that represent the remnants of peak metamorphism. In contrast, the CO2 inclusions of the KGB are of low density, indicative of post-peak conditions. The studies suggest that the CO2-rich fluids may not have come from the supracrustal sediments. An external source, possibly underplated basalt, could have supplied the heat and the supercritical fluids. Based on lithological similarities, it can be stated that the BGB is an extension of the late Archaean Karimnagar granulite belt. The important problem which is still to be solved is the junction of the late Archaean BGB with the Eastern Ghats granulite belt. Copyright (C) 1996 Elsevier Science Ltd

Item Type: Article
Subjects: F Earth Science > Geology
Divisions: Department of > Earth Science
Depositing User: lpa venkatesh user
Date Deposited: 23 May 2021 04:57
Last Modified: 23 May 2021 04:57
URI: http://eprints.uni-mysore.ac.in/id/eprint/16552

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