Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Abstract

Sixteen samples of metavolcanics of Ingaldhal have been analysed for sulphur and for Cu, Co, Ni and Zn (in the hydrogen peroxide-ascorbic acid leach solution). There is no visible mineralisation where the S content in the metavolcanics is below 200 ppm. A sulphur content of more than 500 ppm and/or a copper content of more than 200 ppm in the hydrogen peroxide-ascorbic acid leach, may be indicative of economically important copper mineralisation in the Ingaldhal-type metavolcanics. Mineralised metavolcanics are apparently characterised by higher Cu/Ni (> 90)& Cu/Co (> 60) ratios and lower Co/S(< 0.03) & Ni/S (<0.02) ratios than barren metavolcanics.

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