Invisible gold in the high-sulphur Tertiary coals of Northeast India

Nayak, B and Chakravarty, S and Bhattacharyya, K K (2008) Invisible gold in the high-sulphur Tertiary coals of Northeast India. Current Science, 95 (9). pp. 1334-1337.

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During an investigation of some high-sulphur coals from Meghalaya, Northeast India, with respect to their trace metal content, we recorded the occurrence of gold in iron sulphides (pyrites/marcasite) associated with such coals. A maximum of 6 mg/l gold has been recorded in the pyrite concentrates. Gold is lattice-bound and occurs in ‘elemental form’, forming solid solutions within iron sulphides. It is inferred that the iron sulphides are mostly syngenetic with coal and gold is concentrated in iron pyrites by biological activity during their precipitation and by inorganic adsorption process during recrystallization in a reducing environment.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Gold, sulphur, tertiary coal, trace metal
Divisions:Mineral Processing
ID Code:3
Deposited By:Madhan M
Deposited On:19 Sep 2009 20:58
Last Modified:06 Feb 2012 16:57
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