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Authors
Affiliations
1 Department of Geology, University of Delhi, Delhi- 110 007, IN
2 ITMMEC, IIT, Delhi - 110 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 57, No 5 (2001), Pagination: 455-458
Abstract
Disseminated microscopic gold grains, measuring 8-12 microns across and possessing a fineness of 950 to 960 have been observed in the quartz normative tholeiitic lava flows from the Amarkantak region of the Eastern Deccan Volcanic Province. High temperature of equilibration (1060-1470°C) and very low oxygen fugacity (<5) as determined from the co-existing ulvospinel-magnetite and ilmenite-haematite pairs are proposed to be the controlling factors for the occurrence of gold in these volcanics.
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