40Ar/39Ar dating of tholeiitic flows and dykes of Elephanta Island, Panvel flexure zone, western Deccan Traps: A five-million-year record of magmatism preceding …
Abstract Elephanta Island, located near Mumbai in the western Deccan Traps, is composed
of subaerially erupted tholeiitic lava flows and dykes, with no evolved or pyroclastic rocks. In
contrast, Deccan volcanism in Mumbai includes subaerial and subaqueous lava flows,
intrusions, and pyroclastics, of highly varied composition. The Mumbai and Elephanta
sequences, being in the Panvel flexure zone along the western Indian rifted continental
margin, dip prominently seaward. The bulk of the Mumbai sequence stands dated at 62.5 …
of subaerially erupted tholeiitic lava flows and dykes, with no evolved or pyroclastic rocks. In
contrast, Deccan volcanism in Mumbai includes subaerial and subaqueous lava flows,
intrusions, and pyroclastics, of highly varied composition. The Mumbai and Elephanta
sequences, being in the Panvel flexure zone along the western Indian rifted continental
margin, dip prominently seaward. The bulk of the Mumbai sequence stands dated at 62.5 …
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