Marine geophysical studies off Karwar, West Coast of India

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dc.contributor.author Subrahmanyam, V.
dc.contributor.author Ramana, M.V.
dc.contributor.author SubbaRaju, L.V.
dc.date.accessioned 1997-12-01T10:01:55Z
dc.date.accessioned 2017-09-30T01:29:56Z
dc.date.available 1997-12-01T10:01:55Z
dc.date.available 2017-09-30T01:29:56Z
dc.date.issued 1989
dc.identifier.citation Journal of the Geological Society of India, vol.34(2); 1989; 121-132
dc.identifier.issn 0016-7622
dc.identifier.uri http://drs.nio.org/drs/handle/2264/7228
dc.description.abstract Geophysical studies of the southwestern continental margin revealed significant surface and subsurface topographic highs (ridges) trending NNW-SSE to NW-Se beyond the shelf break. Residual magnetic anomaly map depicts prominent NNW-SSE, NW-SE and E-W trends. The magnetic anomaly map also reveals three different provinces, A, B and C, based on magnetic signatures, confined to inner shelf, outer shelf and lower shelf. A prominent E-W trending structural lineament with a NW-SE trending offset is observed cutting across the inner shelf and the lower shelf. Model studies of the geopotential data over the topographic rise indicate about 18 km thick mafic basement of continental origin at a shallow depth (~800 m). The gravity model studies indicate a thick consolidated sediment layer deposited over the horst and grabenlike features within the granitic layer. The occurrence of ridges parallel to the shelf edge shows the similarity of the western Indian continental margin with the outer typical and extensively studies passive margins
dc.language en
dc.publisher Geological Society of India
dc.relation.ispartof J Geol Soc India
dc.relation.isreferencedby SCI
dc.subject Geology and Geophysics
dc.subject Geology and Geophysics
dc.subject.other continental margins
dc.subject.other topography
dc.subject.other ridges
dc.subject.other magnetic anomalies
dc.subject.other continental shelves
dc.subject.other gravity data
dc.subject.other models
dc.subject.other ISW, India, Karnataka, Karwar
dc.title Marine geophysical studies off Karwar, West Coast of India
dc.type Journal Article
dc.affiliation.author CSIR-National Institute of Oceanography, Dona Paula, Goa, India


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