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dc.contributor.authorJumaila, C P Ummu-
dc.contributor.authorPattan, J N-
dc.contributor.authorAhmad, S M-
dc.contributor.authorParthiban, G-
dc.contributor.authorKhedekar, V D-
dc.contributor.authorPadmakumari, V M-
dc.contributor.authorMilindraj, P-
dc.identifier.issn0975-1033 (Online); 0379-5136 (Print)-
dc.description.abstractGlass shards from an ash layer of about 8 Ma old extracted from a core drilled at an ODP-758 site in the Bay of Bengal (BOB) were studied for morphology and chemical composition in order to trace their possible source. Glass shards are of bubble wall, platy and pumice shard type indicating magmatic type of eruption. Electron probe micro analysis (EPMA) of glass shards suggesta rhyolite composition and high K cal-alkaline series. FeO (1.23%) and TiO2 (0.1%) contents of these glass shards are distinctly higher compared to the earlier known Youngest (~74 ka), Middle (~0.54 Ma) and Oldest (~0.84 Ma) Toba Tuffs. Tectonomagmatic, triangular (Ti-Zr-Y) plot and chondrite- normalized REE pattern, are all indicative of volcanic arc source most probably from the nearby Indonesian arc volcanism.en_US
dc.publisherNISCAIR-CSIR, Indiaen_US
dc.rights CC Attribution-Noncommercial-No Derivative Works 2.5 Indiaen_US
dc.sourceIJMS Vol.46(05) [May 2017]en_US
dc.subjectAsh layeren_US
dc.subject8 Maen_US
dc.subjectBay of Bengalen_US
dc.subjectVolcanic arcen_US
dc.subjectIndonesian arc volcanismen_US
dc.titleMorphology and chemical composition of ash layer of about 8 Ma old from ODP-758 site, Bay of Bengalen_US
Appears in Collections:IJMS Vol.46(05) [May 2017]

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