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dc.contributor.authorSreejith, K.M.
dc.contributor.authorChaubey, A.K.
dc.contributor.authorMishra, A.
dc.contributor.authorKumar, S.
dc.contributor.authorRajawat, A.S.
dc.date.accessioned2017-03-03T08:46:35Z
dc.date.available2017-03-03T08:46:35Z
dc.date.issued2016
dc.identifier.citationJournal of Asian Earth Sciences, vol.131; 2016; 1-11
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/5111
dc.description.abstractMarine gravity data derived from satellite altimeters are effective tools in mapping fine-scale tectonic features of the ocean basins such as pseudofaults, fracture zones and seamounts, particularly when the ocean basins are carpeted with thick sediments. We use high-resolution satellite-generated gravity and seismic reflection data to map boundaries of pseudofaults and transferred crust related to the Paleocene spreading ridge propagation in the Arabian and its conjugate Eastern Somali basins. The study has provided refinement in the position of previously reported pseudofaults and their spatial extensions in the conjugate basins. It is observed that the transferred crustal block bounded by inner pseudofault and failed spreading ridge is characterized by a gravity low and rugged basement. The refined satellite gravity image of the Arabian Basin also revealed three seamounts in close proximity to the pseudofaults, which were not reported earlier. In the Eastern Somali Basin, seamounts are aligned along NE-SW direction forming ~300 km long seamount chain. Admittance analysis and Flexural model studies indicated that the seamount chain is isostatically compensated locally with Effective Elastic Thickness (T<sub>e</sub>) of 3-4 km. Based on the present results and published plate tectonic models, we interpret that the seamounts in the Arabian Basin are formed by spreading ridge propagation and are associated with pseudofaults, whereas the seamount chain in the Eastern Somali Basin might have probably originated due to melting and upwelling of upper mantle heterogeneities in advance of migrating/propagating paleo Carlsberg Ridge.
dc.language.isoen
dc.publisherElsevier
dc.rightsAn edited version of this paper was published by Elsevier. Copyright [2016] Elsevier
dc.subjectGeology and geophysics
dc.subjectGeology and geophysics
dc.subjectOceanographic support services
dc.titlePseudofaults and associated seamounts in the conjugate Arabian and Eastern Somali basins, NW Indian Ocean- New constraints from high-resolution satellite-derived gravity data
dc.typeJournal Article


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