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WEST BENGAL SIKKIM A N ISLANDS
GSI Rec Vol 129 Pt4
Report of investigation for rare metal mineralisation within pegmatite
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activity associated bands bank base basin bearing belt Bihar biotite block bodies boreholes carried clay Code collected Complex comprising construction continued covered depth detailed Director district Division drilling east eastern Engineering exploration exposed fault field flood fold Formation GEOLOGICAL MAP geophysical geotechnical gneiss gold grade grained granite granite gneiss grey Group GSI Rec Hills identified indicate land length lineament located major medium mineralisation minerals nature observed occur Operation Orissa OVERVIEW pegmatite phyllite places Plate Pleistocene potential Pradesh present Project proposed Purulia quartz quartzite range regional reported river rocks samples sand sandstone scale schist sector sediments sequence sericite shale shear zone Singhbhum slope soil stage stream strike structure suggested sulphide Surface survey taken thick Toposheet trending unit values varies veins volcanics West Bengal western