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Geophysical Problems and Methods by L
Mining Geophysics by P C Paul Y R Bhanu
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airborne alluvium anomalies anomaly zones application associated base bed rock belt bodies borehole buried carried causative clay coal components conducted conductor copper covered curves delineated deposits depth determine district drilling effect electrical logging electrical resistivity electromagnetic employed engineering estimated exploration extent fault field formations frequency G. S. I. report geological geophysical surveys Gondwana graphite gravity ground groundwater highly horizons important indicated interpretation investigations layers lignite limestone limited locating logging magnetic mapping material maximum measure metals method mineralisation minerals mining nature negative observed obtained occur ohm-m period places polarisation possible potential presented problem profiles prominent prospecting quartzites radioactivity range recorded refraction river saline schists sediments seismic seismic refraction self-potential shales significant sounding strike structural studies subsurface sulphide surface Survey of India techniques thickness thrust tion traps values various West zones