2.9 b.y. Rb-Sr age of the granulite facies rocks of Satnur- Halagur and Sivasamudram areas, Karnataka, south India.

Mahabaleswar, B. and Peucat, J.J. (1988) 2.9 b.y. Rb-Sr age of the granulite facies rocks of Satnur- Halagur and Sivasamudram areas, Karnataka, south India. Journal - Geological Society of India, 32 (6). pp. 461-467.

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Abstract

Preliminary Rb-Sr isotopic studies of the granulites occurring SW of Kabbaldurga were undertaken to verify the possibility of an earlier granulite facies event. The Rb-Sr data obtained gives an imperfect isochron age of 2950 ± 234 m.y. with an initial ratio of 0.7032 ± 22 (MSWD = 52). The age obtained may correspond to subconcomitant protolith-metamorphism age or metamorphism alone. The high error may be due to non-cogenetic nature of the rocks analysed or a small disturbance of the Rb-Sr system during the 2500 m.y. high-grade event. The present study indicates probability of the occurrence of an early granulite facies event prior to 2500 m.y. -Authors

Item Type: Article
Additional Information: cited By 11
Uncontrolled Keywords: franulite facies; metamorphism; protolith-metamorphism; rubidium-strontium dating, India, Karnataka, Kabbaldurga
Subjects: Faculty of Science > Earth Sciences > Geology
Divisions: Jnana Bharathi / Central College Campus > Department of Geology
Depositing User: Mr. Kirana Kumar D
Date Deposited: 01 Feb 2016 05:55
Last Modified: 01 Feb 2016 05:55
URI: http://eprints-bangaloreuniversity.in/id/eprint/337

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