High-velocity anomaly under the Deccan Volcanic Province

Details High-velocity anomaly under the Deccan Volcanic Province High-velocity anomaly under the Deccan Volcanic Province

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pepi...77..285r&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 77, Issue 3-4, p. 285-296.

Physics

8

Scientific paper

Tomographic modelling of P-wave residuals at 22 vertical-component seismograph stations operated in the Deccan Volcanic Province (DVP) in west-central India and the Dharwar Craton point to the existence of a large, deep (at least 300 km), high-velocity anomaly (1-3% faster) directly beneath most of the DVP and Dharwar Craton. There is also marginal evidence that the westernmost part of the DVP may be characterised by low velocity (up to -1.5%) to a depth of about 200 km. This coherent high-velocity anomaly under the DVP and its extension into the south Indian shield is viewed as a lithospheric root, an architecture characteristic of Precambrian shields.

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