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Authors
Affiliations
1 Geological Survey of India, Sector 10A, Gandhinagar - 382 043, IN
2 Coal Wing, Geological Survey of India, 29, J. N. Road, Calcutta - 700 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 6 (2000), Pagination: 625-632
Abstract
Some samples from a chrome spinel-bearing intrusive picrite within olivine rich Deccan basalts at Limbdi in Saurashtra show anomalous high contents of gold (148-231 ppb), platinum (15-125 ppb) and palladium (17-311 ppb). Other samples bear an avenge of ∼6 ppb of gold, ∼31 ppb of platinum and ∼42 ppb of palladium. Sulphide mineralisation in the picrite is of extremely fine grain size, with low to moderate whole-rock contents of sulphur varying between 0.08 to 0.53 %. Higher values of gold and platinum are found in the western olivine-rich portion of the intrusive, while at surface level platinum/palladium ratio decreases due east with increase in palladium. This intrusive with higher average contents of precious metals could be a potentid target for exploration. Such high contents of gold, platinum and palladium are hitherto unreported from Deccan volcanic province.
Keywords
Gold, Platinum, Palladium, Economic Geology, Picrite, Deccan Trap, Saurashtra, Gujarat.
