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1 Acta Geophysica Polonica

1 2003

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Analyses of total magnetic anomalies over the northeastern marginal areas of Central India

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Singh V. , Singh O. , Agrawal B. , Shanker D.

Acta Geophysica Polonica

2003

tom Vol. 51, nr 2

165-177

Detailed ground magnetic survey has been carried out with the station spacing of 2 to 5 km around Jabalpur-Mandala region. Stron magnetic anomalies are observed in the adjoining areas of Habalpur-Mandala and adjoining areas of Central India. The anomalies are generally closed and aligned in the E-W to NE-SW direction. Magnetic interpretation predicts an average thickness of 0.6 km for the Deccan traps, besides bringing out shallow and deeper intrusive boodies at 1.5 and 4.5 km, respectively. The average thickness of the trap is in good agreement with DSS (Deep Seismic Sounding) and magnetotelluric results. 2-D modeling along six profiles also suggests a number of sheet and dyke-like structures to be present in the region up to a depth of 4.7 km. It is inferred that many zones of weakness along the E_W to NE-SW direction might have existed prior to the Deccan traps volcanism, along which several intrusives.