Central Indian tectonics revisited using aeromagnetic data

Details Central Indian tectonics revisited using aeromagnetic data Central Indian tectonics revisited using aeromagnetic data

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ep%26s...55e...1r&link_type=abstract

Earth, Planets and Space, Volume 55, p. e1-e4.

Physics

2

Scientific paper

Aeromagnetic data, covering 600,000 km2 of Central India, have been analysed for the first time to throw light on the various tectonic blocks of the region, ranging in age from the Archean to the present. Existing geotectonic models are based on inadequate data and studies of relatively small regions. From the aeromagnetic data, we use the analytic signal and Euler deconvolution, to elucidate the subsurface structure of the region and redefine the tectonic elements. Contrary to the belief that the Central Indian shear defines the edge of the Central Indian craton, we find that the Sukinda thrust merges with the Tan shear to demarcate the edge of the Bastar and Eastern Ghat blocks by a shear that extends for approximately 1000 km in length. We call this the Main Peninsular shear. Magnetic anomaly data can thus play a crucial role in understanding the tectonic elements of a region with large surface cover.

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