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OFFSHORE MINERAL ExploratioN AND MARINE GEOLOGY WING
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aeromagnetic amphibolite analysed Andhra Pradesh anomalies associated bands basalt basin bed rock belt Bihar biotite block boreholes Calcutta chalcopyrite chemical clay coal seams Coalfield comprises copper Deccan Trap depth range Director district Division dolomite drill cores drill holes dykes east encountered exposed fault field season Formation fossils geochemical geological mapping Geologist Jr geophysical geotechnical investigation Ghosh gneiss Gondwana granite gneiss grey Group Headquarters Hyderabad India indicated Jaipur Karnataka km was mapped Laboratory limestone line km located logging magnetic magnetite mapped an area mica million tonnes mineral Orissa pegmatite phyllite power house programme quartz quartz veins quartzite Rajasthan Regional river rock types S/Shri samples were collected sandstone scale schist sector sediments shale shear zone Shri siltstone Singh soil spillway sq km sq km area strike length studies sulphide surveys thickness tion toposheet traverse trenching trending tunnel upto varying volcanics West Bengal