Abstract

Very broad band of natural magneto telluric (MT) signal with signal penetration determined by the skin depth provides MT method capability to probe shallow and deep features equally well albeit with decreasing resolution as the depth increases. We used a new processing scheme involving second derivative of the apparent resistivity curve to enhance the effects of thin conducting layers in continental crust at different depths which are otherwise masked in conventional resistivity pseudo sections. Since the second derivative of apparent resistivity curve exhibits a peak/ trough for each interface, the configuration of an interface can be easily marked in a seismic-like plot of these data. Analyses of synthetic data over three different models, viz., Deccan Trap, India, Rhine Graben-Black forest region, Germany and a fold belt demonstrate the potential of the scheme developed.