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Paleogene plate tectonic evolution of the Arabian and Eastern Somali basins

DRS at CSIR-National Institute of Oceanography

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Title Paleogene plate tectonic evolution of the Arabian and Eastern Somali basins
 
Creator Royer, J.-Y.
Chaubey, A.K.
Dyment, J.
Bhattacharya, G.C.
Srinivas, K.
Yatheesh, V.
Ramprasad, T.
 
Subject plate tectonics
tectonophysics
basins
magnetic data
gravity data
palaeogene
 
Description Previous models reviewed for the Paleogene tectonic evolution of the Arabian and Eastern Somali basins and present a model based on a new compilation of magnetic and gravity data. Using plate reconstructions, a self-consistent set of isochrons for Chrona 27 to Chron 21 (61-46 Ma) is derived. The new isochrons account for the development of successive ridge propagation events along the Carlsberg Ridge, leading to an important spreading asymmetry between the conjugate basins. Model predicts the growth of the outer and inner pseudofaults associated with the ridge propagation events. The location of outer pseudo-faults appears to remain very stable despite a drastic change in the direction of ridge propagation before Chron 24 (c. 54 Ma). The motion of the Indian plate relative to the Somalian plate is stable in direction through Paleogene time; spreading velocities decrease from 6 to 3 cm a sup(-1). The reconstruction also confirm that the Arabia-India plate boundary was located west of the Owen Ridge along the Oman margin during Paleogene time; some compression is predicted at about Chron 21 (47 Ma) between the Indian and Arabian plates
 
Date 2008-08-03T09:31:28Z
2008-08-03T09:31:28Z
2002
 
Type Conference Article
 
Identifier The tectonic and climatic evolution of the Arabian Sea region. Ed by: Clift, P.D.Kroon, D.Gaedicke, C.Craig, J.. eds.Geological Society, Burlington House, Piccadilly; UK; 4-5 Apr 2001). 71-85
http://drs.nio.org/drs/handle/2264/1335
 
Language en
 
Rights Geological Society of London
 
Publisher Geological Society of London, UK