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CENTRAL HEADQUATERS 169
AIRBORNE MINERAL SURVEYS AND EXPLORATION WING 85141
COAL WING 144226
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aeromagnetic Andhra anomalies assemblage Barakar Barakar coal seams Barakar Formation Barren Measures base metal basin Bihar block boreholes carried coarse comprises core covered Cruise database Deccan Traps delineated depth range district drilling Dzongkhag east eastern EXPLORATION FOR COAL exposed fault field season foraminifera garnet geochemical Geological Map geophysical gneiss gold Gondwana grade grained granite granulite grey ground evaluation Group horizons Hyderabad indicate intersected investigation lignite limestone limestone band lineament located Madhya Pradesh magnetic mainly metamorphic mineral mineralisation multisensor NW-SE occur Orissa pegmatite phyllite programme quartz quartzite Raniganj Regional exploration remote sensing ridge rocks samples sand sandstone scale schist seabed seam zones sector sediments sequence shale shallow Singhbhum Sohagpur Coalfield soil southern sq km strike structural subsurface Supergroup surface surveys Talchir Tamil Nadu thickness Toposheet traverses trending ultramafic upto Valley Coalfield veins West Bengal