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dc.contributor.authorRao, D.G.
dc.date.accessioned1995-95-16T10:01:02Z
dc.date.accessioned2017-09-29T13:48:32Z
dc.date.available1995-95-16T10:01:02Z
dc.date.available2017-09-29T13:48:32Z
dc.date.issued1984
dc.identifier.citationMarine Geology, vol.61; 1984; 103-110
dc.identifier.issn0025-3227
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/6445
dc.description.abstractTotal magnetic intensity and bathymetric surveys were carried out in the offshore area of Ratnagiri on the western continental shelf of India and an isomagnetic anomalies map at a contour interval of 50 nT was prepared which reveals N-S trends of magnetic anomalies. Two-dimensional model and spectral studies of these anomalies were carried out, and subsurface models of the geology in the area have been derived from anomalies at a number of places. The results suggest that the anomalies occur over a magnetic crystalline basement at a depth of 1-1.2 km which is similar (in magnetization) to onshore basalts of northwest India. These anomalies are believed to be an expression of a considerable thickness (around 1.7 km) of basalt, underlain by sediments. Identification of these basalts in offshore areas along the northwestern continental shelf of India would support (1) the idea that the onshore Deccan basalts of western India and the rhyolitic tuffs at the Laccadive ridge system (DSDP Site 210) are related to the same volcanic events, and (2) subsequent downfaulting of onshore Deccan basalts into the Arabian Sea and submergence below the Tertiary sediments
dc.languageen
dc.publisherElsevier
dc.relation.ispartofMar Geol
dc.relation.isreferencedbySCI
dc.subjectGeology and Geophysics
dc.subject.otherpalaeo studies
dc.subject.otherbasalts
dc.subject.otherdeep-sea drilling
dc.subject.otherbathymetry
dc.subject.othercontinental shelves
dc.subject.othermagnetic anomalies
dc.subject.otherISW, India, West Coast
dc.titleMarine magnetic anomalies off Ratnagiri, Western continental shelf of India
dc.typeJournal Article


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