Archaean high-grade gneiss complex from Satnur-Halagur-Sivasamudram areas, Karnataka, southern India: petrogenesis and crustal evolution

Mahabaleswar, B. and Jayananda, M. and Peucat, J.J. and Swamy, N.S. (1995) Archaean high-grade gneiss complex from Satnur-Halagur-Sivasamudram areas, Karnataka, southern India: petrogenesis and crustal evolution. Journal - Geological Society of India, 45 (1). pp. 33-49. ISSN 0974-6889

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Official URL: http://www.geosocindia.org/index.php/jgsi/article/...

Abstract

The high-grade gneiss complex of the Satnur-Halagur-Sivasamudram area in southern Karnataka forms a part of amphibolite-granulite facies transition zone of southern India. The major lithologies are metasediments, amphibolite facies gneisses, foliated charnockites, mafic granulites, granite sheets. All these lithologies show a prominent N-S fabric which appears to have been produced during late Archaean shear deformation. Rb-Sr whole rock isochron and U-Pb zircon and monazite ages suggest that much of the crust accreted during 2.96 Ga magmatic event followed by the 2.5 Ga granulite facies metamorphism; the occurrence of a previous high-grade metamorphism close to 2.9 Ga remains debatable. -from Authors

Item Type: Article
Additional Information: cited By 37
Uncontrolled Keywords: Archaean; crustal evolution; gneiss; granulite; petrogenesis, India, Karnataka, Satnur-Halagur-Sivasamudram
Subjects: Faculty of Science > Earth Sciences > Geology
Divisions: Jnana Bharathi / Central College Campus > Department of Geology
Depositing User: Mr. Kirana Kumar D
Date Deposited: 02 Feb 2016 07:20
Last Modified: 02 Feb 2016 07:20
URI: http://eprints-bangaloreuniversity.in/id/eprint/487

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