Bathymetric highs in the mid-slope region of the western continental margin of India - Structure and mode of origin

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dc.contributor.author Rao, D.G.
dc.contributor.author Paropkari, A.L.
dc.contributor.author Krishna, K.S.
dc.contributor.author Chaubey, A.K.
dc.contributor.author Ajay, K.K.
dc.contributor.author Kodagali, V.N.
dc.date.accessioned 2010-09-17T11:35:54Z
dc.date.available 2010-09-17T11:35:54Z
dc.date.issued 2010
dc.identifier.citation Marine Geology, vol.276(1-4); 58-70
dc.identifier.uri http://drs.nio.org/drs/handle/2264/3711
dc.description.abstract Analysis of the multi- and single beam bathymetric, seismic, magnetic and free-air gravity (ship-borne and satellite derived) data from the western continental margin of India between 12 degrees 40 minutes N and 15 degrees N had revealed the presence of several flat topped NNW-SSE trending bathymetric highs of considerable areal extent, 256 to 1165 km sup(2) area each at base. They are interspersed by bathymetric lows, thereby, forming a chain of horst and graben structures covered by thick sediments. 2-D modeling of the gravity and magnetic anomalies constrained by seismic results (reflection and refraction) had indicated approx. 23 km thick crust consisting of 2 to 3 km thick sediments, and a thin basaltic and granitic layer. The model has brought into focus the presence of mantle based volcanic plugs. Their geomorphological and geophysical expressions and structural pattern and associated deep-seated faults led to suggest continental crust. These features are inferred as rifted fragments of the western continental margin of India formed during its northward movement. They were subjected to sub-aerial erosion during the Paleogene due to lowered sea levels resulting in flat tops. Subsequently they were submerged to the present depths in the Neogene. The basic tectonic process appears to be regional
dc.language.iso en
dc.publisher Elsevier
dc.rights An edited version of this paper was published by Elsevier. Copyright [2010] Elsevier
dc.subject continental margins
dc.subject crustal structure
dc.subject tectonics
dc.subject continental ridges
dc.subject bathymetric data
dc.subject seismic data
dc.title Bathymetric highs in the mid-slope region of the western continental margin of India - Structure and mode of origin
dc.type Journal Article


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