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AIRBORNE MINERAL SURVEYS AND EXPLORATION WING 85141
COAL WING 144226
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analysis anomalies assemblage associated band Barakar base basin Bengal Block boreholes carried Central clay coal seams Coalfield coarse Code collected Complex comprises continued core course covered Cruise deposits depth detailed district Division dominant drilling east eastern encountered evaluation EXPLORATION FOR COAL exposed extension fault field field season Formation forms four Geological Map geophysical gneiss gold Gondwana grade grained granite grey ground Group horizons INDEX indicate intersected lignite limestone located Lower Madhya Pradesh magnetic mainly major Measures metal mineral mineralisation Nagpur occur Orissa pattern phyllite present quartz quartzite range Raniganj recorded Regional exploration represented revealed ridge River rocks samples sand sandstone scale schist sector sediments sequence sericite shale shallow shear soil southern strike structural suggest surface surveys taken thickness trace trending upto Valley values varies West zone