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AIRBORNE MINERAL SURVEYS AND EXPLORATION WING 4671
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alignment amphibolite analysis Andhra Pradesh anomaly associated Asstt bands basalt basin Bihar biotite block boreholes carried clay coal Coalfield comprises Construction stage core covered Deccan Trap delineated deposits depth Director Geologist district Code DIVISION Director DIVISION Headquarters drilling dykes evaluation exploration exposed field season flows Formation foundation geochemical geological investigation geological mapping Geologist Geologist Jr GEOLOGY DIVISION geophysical geotechnical investigation gneiss gold Gondwana granite granite gneiss gravity grey Group holes indicated intrusive Karnataka km long Kumar limestone located logging magnetic migmatite mineral mineralisation occur Orissa pegmatite phyllite power house proposed quartz quartz veins quartzite Quaternary Rajasthan REGIONAL GEOLOGY reservoir river rock types sand sandstone scale schist schist belt seams sediments shale shear zone Shri S. K. siltstone Singh slope soil spillway sq km stage geotechnical investigation strike length studies suggested sulphide Supergroup surface surveys thickness tion Toposheet traverses trending tunnel upto