Origin of grunerite schist-hosted magnesite mineralization in copper mountain area, sandur schist belt, Karnataka

Krishna Rao, B. and Hanuma Prasad, M. and Vasudev, V. N. and Sethumadhav, M. S. (1994) Origin of grunerite schist-hosted magnesite mineralization in copper mountain area, sandur schist belt, Karnataka. JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 44 (3). pp. 267-274. ISSN 0016-7622

Full text not available from this repository. (Request a copy)

Abstract

Magnesite mineralization in the Copper Mountain area of the Sandur schist belt occurs scattered in a 5km long and 50 to 200 m wide grunerite schist unit of Late Archaean age. Magnesite occurs mostly as less than a cm to about 50 cm thick parallel to subparallel veins. The veins are confined to gently dipping joints and tensional fractures transecting the steeply dipping bedding and schistosity of the host rock. Magnesite is cryptocrystalline and is associated with minor amounts of dolomite/magnesian calcite, calcite, cryptocrystalline silica and iron oxyhydroxides. Magnesite veins are essentially of cavity filling origin. Field setting, rock and mineral chemistry and stable isotope data indicate that magnesite was precipitated at ambient temperatures from descending meteoric waters enriched in biogenic and atmospheric CO2 and Mg2+, the latter derived from the upper weathered portion of the host grunerite schist.

Item Type: Article
Additional Information: Unmapped bibliographic data: DA - 1994/09// [EPrints field already has value set] LA - English [Field not mapped to EPrints]
Uncontrolled Keywords: ECONOMIC GEOLOGY, KARNATAKA, MAGNESITE, SANDUR SCHIST BELT, WEATHERING
Subjects: Physical Sciences > Earth Science
Depositing User: Users 24 not found.
Date Deposited: 04 May 2013 12:16
Last Modified: 11 Nov 2015 06:53
URI: http://eprints.uni-mysore.ac.in/id/eprint/8367

Actions (login required)

View Item View Item