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Tectonics of the Bay of Bengal: New insights from satellite-gravity and ship-borne geophysical data

DRS at CSIR-National Institute of Oceanography

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Title Tectonics of the Bay of Bengal: New insights from satellite-gravity and ship-borne geophysical data
 
Creator Subrahmanyam, C.
Thakur, N.K.
Rao, T.G.
Khanna, R.
Ramana, M.V.
Subrahmanyam, V.
 
Subject tectonics
tree air anomalies
bathymetric data
transform faults
magma
models
 
Description Recently released satellite-derived free air gravity anomalies and the existing ship-board geophysical data provide new insights into the tectonics of the Bay of Bengal with respect to the structure and regional extension of the buried 85 degrees E ridge and the tectonics of the Eastern Continental Margin of India (ECMI). The 85 degrees E ridge can be visualized extending inland via the Mahanadi basin volcanics to the Rajmahal Traps. A large volcanic province in eastern India encompassing the Rajmahal and Sylhet Traps and volcanics in the Bengal and Mahanadi basins, almost on the scale of the Deccan volcanic province along the west coast, can be envisaged taking into account the occurrences of intrusive rocks around the age of 117 Ma. Gravity models of the ridge are indicative of hotspot-related crustal underplating processes beneath the ridge. The ECMI can be divided into a southern transform and northern rifted segments on the basis of gravity and bathymetry data, which bear similarities with the conjugate East Antarctica margin
 
Date 2009-01-10T11:15:57Z
2009-01-10T11:15:57Z
1999
 
Type Journal Article
 
Identifier Earth Planetary Science Letters, Vol.171; 237-251p.
http://drs.nio.org/drs/handle/2264/1787
 
Language en
 
Rights Copyright [1999]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Elsevier