Radiolarian abundance and geochemistry of the surface-sediments from the Central Indian Basin: Inferences to Antarctic bottom water current

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dc.contributor.author Gupta, S.M.
dc.contributor.author Jauhari, P.
dc.date.accessioned 1994-05-19T10:06:26Z
dc.date.accessioned 2017-09-30T01:56:26Z
dc.date.available 1994-05-19T10:06:26Z
dc.date.available 2017-09-30T01:56:26Z
dc.date.issued 1994
dc.identifier.citation Current Science, vol.66(9); 1994; 659-663
dc.identifier.issn 0011-3891
dc.identifier.uri http://drs.nio.org/drs/handle/2264/7420
dc.description.abstract The distribution trend of numbers of radiolarian shells/gram dry sediment, biogenic silica, organic carbon, and the carbon/nitrogen ratios in the surface sediments of the Central Indian Basin is similar. Ratios of two suborders of radiolaria, i.e. the nassellaria (N) and spumellaria (S), show a trend opposite to the above parameters. Low values of organic carbon in the basin indicate that the basin is oxygenated and sedimentary organic carbon is oxidized. The higher N/S values coincide with the entrance of oxygen-rich Antarcitc bottom water in the eastern side of the basin. As nassellarians are comparatively less susceptible to dissolution, their ratio with spumellarians indicates differential oxygen content in the sediments. Therefore, it is proposed that N/S ratio in the sediments may be considered as the index for the oxygen content and a proxy for Antarctic bottom water (AAWB) current within the Central Indian Basin
dc.language en
dc.publisher Current Science Association
dc.relation.ispartof Curr Sci India
dc.relation.isreferencedby SCI
dc.subject Geology and Geophysics
dc.subject.other sediments
dc.subject.other geochemistry
dc.subject.other organic carbon
dc.subject.other silica
dc.subject.other bottom currents
dc.subject.other ISW, Central Indian Ocean Basin
dc.title Radiolarian abundance and geochemistry of the surface-sediments from the Central Indian Basin: Inferences to Antarctic bottom water current
dc.type Journal Article
dc.affiliation.author CSIR-National Institute of Oceanography, Dona Paula, Goa, India


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