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dc.contributor.authorKocherla, M.
dc.contributor.authorRay, D.
dc.contributor.authorSatyanarayanan, M.
dc.contributor.authorJoao, H.M.
dc.contributor.authorGaikwad, V.
dc.contributor.authorRamamurty, P.B.
dc.date.accessioned2024-10-03
dc.date.accessioned2024-10-10T11:45:58Z
dc.date.available2024-04-29
dc.date.available2024-10-10T11:45:58Z
dc.date.issued2024
dc.identifier.citationActa Oceanologica Sinica, vol.43(2); 2024; 111-119
dc.identifier.issn1869-1099
dc.identifier.otherhttps://link.springer.com/article/10.1007/s13131-023-2195-5
dc.identifier.urihttps://doi.org/10.1007/S13131-023-2195-5
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9263
dc.descriptionIF2022= 1.4
dc.description.abstractThe tephra layers in multiple sediment cores from the offshore region of the Mahanadi basin in the northern Bay of Bengal were investigated for possible volcanic sources. The glass shards from those tephra layers were studied for size distribution, texture, and elemental geochemistry to establish chronostratigraphic markers for regional and global Quaternary correlation. The textural features of fine-grained (silty) volcanic glasses suggest the distal source of these tephra deposits. Major element composition with elevated SiO2 contents ranging between 75%-76% and dominance of K2O (> 4.5%) over CaO (< 0.9%) suggest ashes have originated from siliceous rhyolitic melts, similar to the petrographic composition of tephra from the Toba volcano. The bulk trace element compositions of the same glass shards were comparable with those reported in the youngest Toba tephra reported elsewhere. Likewise, the LREE-dominated chondrite normalized REE profiles of tephra from the Mahanadi basin closely resemble the characteristic REE patterns in Toba ash from other parts of the Indian Ocean and thus confirmed the contribution of the youngest Toba super-eruption for this ash layers.
dc.languageen
dc.publisherSpringer
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleGeochemistry of volcanic glass from Mahanadi offshore region, eastern continental margin of India: Constraints on the contribution of latest Toba super-eruption
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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