Show simple item record

dc.contributor.authorPattan, J.N.
dc.contributor.authorMasuzawa, T.
dc.contributor.authorYamamoto, M.
dc.date.accessioned2006-09-01T11:29:38Z
dc.date.available2006-09-01T11:29:38Z
dc.date.issued2005
dc.identifier.citationCurrent Science, vol.89(8), 1421-1425p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/337
dc.description.abstractThe bulk concentration (wt%) and mass accumulation rates (MAR; g/cm sup(2)/ka) of terrigenous source representing elements such as Al, Ti, K and Zr in a sediment core (SK-129/CR-05) from southeastern Arabian Sea, record considerable variations in riverine sediment discharge over the last 140 ka. The mean Al concentration (4.51 plus or minus 0.47%) and its MAR (0.105 g/cm sup(2)/ka) are higher during the glacial period and lower (3.61 plus or minus 0.58%; 0.084 g/cm sup(2)/ka) in the interglacial period. This suggests an increased terrigenous sediment discharge (TSD) of approx. 25% corresponding with chemical weathering (K/Al ratio) during glacials than in the interglacials. The last approx. 5 ka received lowest and uniform TSD (mean Al concentration -2.36 plus or minus 0.06%; Al MAR, 0.075 g cm sup(2)/ka; K/Al ratio, 0.23 plus or minus 0.003) may be due to weak monsoon and stabilized sea level. Marine Isotope Stage (MIS) - and 4 recorded the lowest and highest TSD respectively. Interestingly, during MIS-5, interstadials (5.1, 5.3 and 5.5) were associated with relatively larger TDS, suggesting humid conditions and intense precipitation. On the contrary, stadials (5.2 and 5.4) were characterized by relatively smaller TDS, indicative of low precipitation and arid condition in the Indian subcontinent.
dc.format.extent156092 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherIndian Academy of Sciences
dc.subjectArabian Sea
dc.subjectsediment core
dc.titleVariations in terrigenous sediment discharge in a sediment core from southeastern Arabian Sea during the last 140 ka
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record