Geophysical Exploration for Gold in Eastern Mahakoshal Belt

Integrated geophysical surveys comprising resistivity and chargeability (both gradient and Dipole-Dipole), SP, magnetic and borehole Mise-a-La-Masse methods coupled with geoelectrolysis techniques and geochemical analysis of soil samples led to the delineation of several auriferous sulphide bodies in the eastern Mahakoshal belt. Combined analysts of surface geophysical, borehole geophysical and geoelectrolysis methods are presented in respect of three areas viz. Gurahar Pahar, Tisihwa and Gulaldih Geophysical interpretations were based on the observed response (parametric survey) over the different exposed rock types in the area Moderately high chargeability coupled with moderate low resistivity, negative SP, high Geo-Electrochemical anomaly supported by geochemical soil sample anomaly proved to be indicative of concealed sulphide conductors. Mise-a-La-Masse technique delineated the extension of the sulphide body projected on a horizontal plane and its dip direction.