Tectonic stability of the Farakka dam and its adjoining regions in east India

Details Tectonic stability of the Farakka dam and its adjoining regions in east India Tectonic stability of the Farakka dam and its adjoining regions in east India

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pepi...58...87s&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 58, Issue 1, p. 87-93.

Physics

Scientific paper

The results of gravity, magnetic and seismic surveys carried out in the neighbourhood of the Farakka dam in east India are presented. A major deep-seated fault, extending from Kishanganj to south of Malda, has been inferred from gravity data. This fault runs ~ 20 km east of the Farakka dam, with a north-south trend. Magnetic anomalies over this region are strong and show tight closures. This could indicate the presence of basaltic lava at shallow depths. P-wave velocities vary from 4.6 to 5.6 km s-1 at depths from 35 to 250 m. Borehole data support these findings. Magnetic and seismic observations do not support the fault inferred from gravity data.

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