Show simple item record

dc.contributor.authorMudholkar, A.V.
dc.contributor.authorPattan, J.N.
dc.contributor.authorParthiban, G.
dc.date.accessioned2009-05-06T10:40:26Z
dc.date.available2009-05-06T10:40:26Z
dc.date.issued1993
dc.identifier.citationIndian Journal of Marine Sciences, Vol.22(4); 241-246p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/2822
dc.description.abstractFour sediment cores from the Central Indian Ocean Basin (CIOB) were studied to characterise the coarse fraction (less than 63 mu), transition metal and major oxide contents. Transition metals (Mn, Cu, Ni, Zn) show enrichment towards the surface, thought to be of diagenetic origin. Metals are suppliEd. by upward migration from a suboxic to anoxic zone at an intermediate depth of 12-35 cm below the sediment-water interface in all the cores. Buried maxima in transition metal concentration at depth of 26-55 cm below the sediment-water interface may represent relict enrichments formed prior to the formation of suboxic to anoxic zone. R-mode factor analysis suggests that detrital and diagenetic/hydrogenous components are the two main sources of elements in these sediments. The terrigenous index factor [Al/(Al+Fe+Mn)] showed its maximum influence as far south as 14 degrees S from approximately 140 to 100 ky BP (last interglacial maxima). This might be related to discharge of large quantity of sediments by Ganges and Brahmaputra rivers during intensive monsoon in the Asian sub-continent during that period
dc.language.isoen
dc.publisherNISCAIR, New Delhi
dc.rightsCopyright [1993]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectdeep water
dc.subjectsediments
dc.subjectcores
dc.subjectgeochemistry
dc.subjecttransition elements
dc.subjectmanganese
dc.subjectcopper
dc.subjectnickel
dc.subjectzinc
dc.titleGeochemistry of deep-sea sediment cores from the Central Indian Ocean Basin
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record