Seismic and magnetotelluric studies over a crustal scale fault zone for imaging a metallogenic province of Aravalli-Delhi Fold Belt region

Seismic reflectivity signatures across the Proterozoic Aravalli-Delhi Fold Belt of the NW Indian shield suggest a tectonic history of continental coll isions. The associated deep-seated faults indicate thick skinned tectonics in their evolution. A crustal scale thrust fault (Jahazpur thrust) originat es from the top of reflection Moho at the boundary of the Sandmata and Mang alwar Complex and surfaces near Jahazpur. The presence of zinc-lead mineral ization at Agucha, Sawar and Jahazpur in the thrust zone region suggests a close relationship between crustal scale tectonics and mineralization of th e region. The gross geoelectrical section derived by digitizing magnetotell uric data along a part of the seismic profile correlates well with seismic reflectivity characteristics. The geophysical signatures suggest that the c rustal scale fault zones might have acted as conduits for transportation of the ore fluids. Such a process was responsible for the high reflectivity a nd high conductivity, thus making the structures excellent targets for deli neation by seismic and magnetoteiluric methods.