Petrochemical characteristics of Archaean metasediments from the Biligirirangan granulite terrain, Dharwar Craton South India.

Basavarajappa, H. T. and Prakash, Narasimha K. N. and Srikantappa, C. (2004) Petrochemical characteristics of Archaean metasediments from the Biligirirangan granulite terrain, Dharwar Craton South India. Indian Mineralogist, 38 (2, Cop). pp. 25-38. ISSN 0019-5928

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Abstract

Granulites are important constituents of the middle to lower crust. Metasedimentary rocks such as Banded Magnetite Quartzite - Mn rich metasediments (qtz+magnetite+ opx +/- garnet), pelites (sill + grt + stau and bio ± corundum; plagio + grt + bio + opx +corundum) and calc-silicate (cal + grt-gr rich -grt + scap + hbl + ca-plagio) occur, forming part of the Biligirirangan granulites and the amphibolite-facies gneissic terrain in southern part of the Dharwar Craton. Both in terms of major and trace elements geochem., the metasediments indicate their precursors to be sediments, despite strong deformation and high-grade metamorphism. The chem. of the metasediments of Biligirirangan granulites are comparable to the metasediments of older Sargur group of rocks (> 3.0 Ga) in the Dharwar Craton and indicate to their deposition under epicontinental platform/shelf environment under shallow water and stable tectonic conditions. They represent proto-Superior type sediments. [on SciFinder(R)]

Item Type: Article
Additional Information: Unmapped bibliographic data: PY - 2004/// [EPrints field already has value set] JA - Indian Mineral. [Field not mapped to EPrints]
Uncontrolled Keywords: metasediment granulite pelite banded quartzite Dharwar Craton South India
Subjects: Physical Sciences > Earth Science
Divisions: PG Campuses > Manasagangotri, Mysore > Earth Science
Depositing User: Chandrappa
Date Deposited: 04 Jun 2013 04:53
Last Modified: 07 Aug 2013 05:57
URI: http://eprints.uni-mysore.ac.in/id/eprint/11135

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