Signals of degeneration of the sub-crustal part of the Indian lithosphere since the break-up of Gondwanaland

Details Signals of degeneration of the sub-crustal part of the Indian lithosphere since the break-up of Gondwanaland Signals of degeneration of the sub-crustal part of the Indian lithosphere since the break-up of Gondwanaland

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...48....1p&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 48, Issue 1-2, p. 1-4.

Physics

4

Scientific paper

Currently, the continental fragments of the erstwhile Gondwanaland supercontinent are widely separated. A relative comparison of Magsat anomalies of these fragments reveals a striking similarity across all the rifted continental margins except at the western and southern margins of India. It reflects that magnetized crust has largely remained unchanged elsewhere since the break-up of Gondwanaland. A similar analysis of satellite derived free-air gravity anomalies also indicate a similar continuity across other rifted margins except those of India. These anomalies characterise the existing differences in the crustal and upper-mantle structures and causal dependence on the relative mobilities of the Gondwanic continents. It is evident that after the break-up, only the Indian continental structure has suffered a dramatic change, possibly due to its super northward drift from Antarctica during Late Cretaceous-Early Tertiary.

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