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

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Gold in the form of cuprian grains is reported based on Electron Probe Micro Analyzer (EPMA) study of a sample received from the chromite tailing dumps of South Kallapani mines, Sukinda Ultramafic Belt, Jajpur district, Orissa The cuprian gold grains vary in size from 3 microns to 10 microns and are found as disserninations within the chromite host-phase Chromite is one of the eallest minerials to form whereas hydrothermal process is charactenstic of gold The association of chromite and gold grains is therefore unusual and highly intcresting Textural features suggest that the gold gram are more likely to be genuine primary inclussions within the host chromite rather than being late stage hydrothermal products filling up cavities or open spaces A preliminaray account of characterization studies of gold grains involving back-scattered electron imaging, X-ray element 'dot' mapping, and qualitative elemental scanning are presented.

Keywords

Cuprian Gold, Chromite, Sukinda Valley, Kaliapani mines, Jajpur district Orissa.
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