Structure and tectonics of the Indian peninsular shield - Evidences from seismic velocities

Indian shield is an assemblage of cratons and mobile belts. Significant lat eral variations in the crustal velocity structure, especially the presence and absence of crustal low/high velocity layers are found to provide an use ful input in understanding the structure and evolution of various important tectonic units present in the Indian shield. The subsurface velocity heter ogeneities have been shown to provide clues to estimate the stress generati on and im understanding to some extent, the seismicity of intraplate region s. Significance and the geophysical aspects of low velocity layers are disc ussed. Other geophysical anomalies such as gravity, heat flow and seismicit y are also discussed with reference to craton and mobile belt.