Geophysical Methods for Subsurface Geological Mapping in Bethunmi-Dariba-Bhopalsagar Belt of Rajasthan-A Case Study

Geophysical Surveys employing, magnetic, self-potential and resistivity methods in Bethunmi-Bhopalsagar belt in Rajasthan have proved to be effective in identifying and mapping the various litho-units largely concealed under soil cover. An important discovery in the area was a striking closure of a local structure to the south of Dariba by magnetic suryeys. The disappearance of the graphitic mica schist and amphibolite to the south of Dariba may be explained by the structural closure brought out by these surveys rather than by faulting as invoked from geological evidences.