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The role of break-up localization in microcontinent separation along a strike-slip margin: the East India–Elan Bank case study

By
Sudipta Tapan Sinha
Sudipta Tapan Sinha
1
Reliance Industries Ltd, Navi Mumbai, India
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Michal Nemčok
Michal Nemčok
2
Energy and Geoscience Institute at University of Utah, 423 Wakara Way, Suite 300, Salt Lake City, UT 84108, USA
3
EGI Laboratory at SAV, Dúbravská cesta 9, 840 05 Bratislava, Slovakia
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Mainak Choudhuri
Mainak Choudhuri
1
Reliance Industries Ltd, Navi Mumbai, India
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Neeraj Sinha
Neeraj Sinha
1
Reliance Industries Ltd, Navi Mumbai, India
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D. Pundarika Rao
D. Pundarika Rao
1
Reliance Industries Ltd, Navi Mumbai, India
4
Tech Mahindra Limited, Hyderabad, India
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Published:
January 01, 2016

Abstract

The Elan Bank microcontinent was separated from East India during the Early Cretaceous break-up. The crustal architecture and rifting geometry of East India and the Elan Bank margins document that the early break-up between India and Antarctica was initiated in the eastern portions of the Cauvery and Krishna–Godavari rift zones, and in the southern portion of Elan Bank. However, the westwards break-up propagation along the Krishna–Godavari Rift Zone continued even after the break-up in the overstepping portion of the Cauvery Rift Zone. Eventually, the western propagating end of the Krishna–Godavari Rift Zone became hard-linked with the failed western portion of the Cauvery Rift Zone by the dextral Coromandel transfer fault zone. Consequently, the break-up location between India and Antarctica shifted from its initial to its final location along the northern portion of the Elan Bank formed by the western Krishna–Godavari Rift Zone. The competition between the two rift zones to capture continental break-up and asymmetric ridge propagation resulted in a ridge jump and the Elan Bank microcontinent release.

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Geological Society, London, Special Publications

Transform Margins: Development, Controls and Petroleum Systems

M. Nemčok
M. Nemčok
EGI, University of Utah, USA EGI Laboratory at SAV, Slovakia
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S. Rybár
S. Rybár
EGI Laboratory at SAV, Slovakia Comenius University, Slovakia
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S. T. Sinha
S. T. Sinha
Reliance Industries Ltd, India
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S. A. Hermeston
S. A. Hermeston
White Rose Energy Ventures, UK
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L. Ledvényiová
L. Ledvényiová
EGI Laboratory at SAV, Slovakia Comenius University, Slovakia
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Geological Society of London
Volume
431
ISBN electronic:
9781862399631
Publication date:
January 01, 2016

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