Tectonic environment and petrogenesis of gold-bearing volcanics of hutti greenstone belt, Dharwar Craton, India

Riyaz Ulla, M.S. and Ahmed, S.A. and Pathan, A.M. and Hausen, D.M. (1997) Tectonic environment and petrogenesis of gold-bearing volcanics of hutti greenstone belt, Dharwar Craton, India. Indian Minerals, 51 (1-2). pp. 25-40. ISSN 0019-5936

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Abstract

The Hutti greenstone belt, located in the northern side of Dharwar craton, India, contains sereral promising gold fields. It is predominantly composed of metavolcanics with minor intercalations of metasedimentaries. Alkali-SiO 2 and Zr-P 2O 5 diagrams, immobile element trends, and an iron-rich trend on the AFM diagram indicate that the volcanic suite is low-potassium tholeiitic basalt. The lower Mg number, MgO-TiO 2, MgO-Ni, and Ni-Zr plots reveal that the basalt was derived from a fractionated, highly-evolved magma generated by 10-20 melting of the mantle at 1100°C temperature and 5 kb pressure. The chemical variations suggest that the Hutti metabasat represents volcanic arc rocks generated at a converging plate margin.

Item Type: Article
Additional Information: cited By 1
Uncontrolled Keywords: gold; greenstone belt; tectonics; volcanic rock, India
Subjects: Faculty of Science > Earth Sciences > Geology
Divisions: Jnana Bharathi / Central College Campus > Department of Geology
Depositing User: Mr. Kirana Kumar D
Date Deposited: 03 Feb 2016 10:42
Last Modified: 03 Feb 2016 10:42
URI: http://eprints-bangaloreuniversity.in/id/eprint/555

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