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ISSN 2063-5346
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A NEW REPORTING OF CALC-GRANULITES AT BARADGATTA AREA FROM THE MAKROHAR GRANULITE BELT IN CHOTANAGPUR GRANITE GNIESS COMPLEX,CENTAL INDIA.

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Vikas Pandey1*, Raviranjan Kumar Sharma2and Shyam B. Dwivedi3
» doi: 10.31838/ecb/2023.12.si5.003

Abstract

We are reporting a new locality of calc-granulite from the Baradgatta area of the Makrohar granulite belt including the mineral assemblage garnet – clinopyroxene – plagioclase – sphene - clinozoisite. The Makrohar granulite belt (MKG) is located northwest extension of the chotanagpur granite gneiss complex along the northern margin of the central Indian tectonic zone. A peak pressure condition of 5.24 kbar at 600 °C is obtained from Grt-Cpx-Pl-Qz barometers and the estimated temperature is 675 °C at 7 kbar. The average P–T condition of metamorphism of granulite formation is at 624 ± 97 °C and 5.6 ± 0.8 kbar. The formation of stable mineral assemblages such as (Grt-Cpx-Sph-Cz-Pl) in the NCFMAST-HC model system is suitable within the temperature range of 620-635°C at (XCO2> 0.4).

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