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Geophysical Mapping Centre
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activity analysis anomaly associated bands Barakar base basin belt Bihar block bodies borehole carried channel clay coal seams Coalfield Code collected complex continued core course covered depth detailed Director district Division drilling east eastern exploration exposed extension fault field season folds Formation GEOLOGICAL MAP geophysical geotechnical gneiss gold grade grained granite granite gneiss grey ground Group GSI RECORDS heavy identified indicated interpretation intersected komatiite lignite limestone located magnetic major mineral mineralisation nature observed occur Orissa OVERVIEW PLATE potential present processing programme Project prospect quartz quartzite range regional represented river rocks samples sand scale schist sector sediments sericite shear Singhbhum soil Sonarpur stage stream strike structural surface survey taken thickness trending unit upto Valley values varies veins West Bengal zone