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dc.contributor.authorMukherjee, Soumyajit
dc.contributor.authorDole, G.
dc.contributor.authorYatheesh, V.
dc.contributor.authorKale, V.S.
dc.date.accessioned2020-03-31
dc.date.accessioned2021-02-09T10:13:24Z
dc.date.available2020-01-03
dc.date.available2021-02-09T10:13:24Z
dc.date.issued2020
dc.identifier.citationProceedings of the Indian National Science Academy, vol.86(1); 2020; 237-244
dc.identifier.issn2454-9983
dc.identifier.otherhttps://insa.nic.in/UI/Abstract.aspx?Aid=73479
dc.identifier.urihttps://doi.org/10.16943/ptinsa/2020/49816
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/8565
dc.descriptionIF2018 - No Impact Factor
dc.description.abstractIn the Deccan Trap, the west coast around Mumbai is presently designated as a �sheared margin� with nearly N-S trending strike-slip brittle shears. The eastern part of the Deccan trap shows prolific conjugate strike-slip faults. Tertiary and Quaternary reactivations of the sub-Trappean discontinuities had a geomorphologic implication since they modified the Deccan drainage systems.The marine geophysical investigations carried out in the western offshore regions have yielded a detailed understanding of the role of Deccan volcanism on the India-Seychelles-Madagascar breakup and the subsequent formation and evolution of the Western Indian Ocean. The revised plate tectonics takes care of the microcontinental slivers and the extinct spreading centers. The fossil Gop-Narmada-Laxmi Triple Junction was initiated by the earliest manifestation of the Deccan volcanism ~ 68.5 Ma. The Western Indian Ocean depicts a sharp drop in the spreading rate at around chron C28no (~ 63.63 Ma), soon after the main pulse of the Deccan volcanism. Based on the correlation of estimated 40Ar/39Ar ages for the onshore Ghatkopar-Powai tholeiites and the inferred age of the Raman-Panikkar-Wadia seamount chain in the Laxmi Basin, both these features are interpreted to represent the volcanic emplacement coeval to the Deccan volcanism at ~ 62.5 Ma
dc.languageen
dc.publisherIndian National Science Academy
dc.relation.ispartofProc Indian Natl Sci Acad
dc.relation.isreferencedbyNON-SCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleTectonics of the Deccan Trap: Focus on Indian Geoscientists� Contribution in the Last Four Years
dc.typeJournal Article
dc.affiliation.authorDepartment of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, Maharashtra, India


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