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AIRBORNE MINERAL SURVEY AND EXPLORATION WING
MINERAL INVESTIGATIONS OF THE CIRCLES AND DIVISION
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alignment analysis anomaly associated bands block bodies boreholes carried Circle clay coal collected comprising continued core covered delineated deposits depth detailed Director district Division drilling east examined exploration exposed extension fault field flows folds Formation geological geological mapping Geologist geophysical gneiss grade granite Group hill holes India indicated iron laboratory length limestone located logged lower magnetic major mineralisation minerals Nagpur nature observed occurs officers phyllite pits places Pradesh prepared present Project proposed quartz quartzite ranging recommended recorded regional reported resistivity river rock rock types samples sand sandstone Sarvashri scale schist seams sediments shale shear Shri soil sq km stage strike structural studies suggested surface surveys thickness tion tonnes traced traverse trending tunnel units Upper Valley values varying veins zone