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dc.contributor.authorPattan, J.N.
dc.contributor.authorShane, P.
dc.date.accessioned2009-01-10T11:15:58Z
dc.date.available2009-01-10T11:15:58Z
dc.date.issued1999
dc.identifier.citationMarine Geology, Vol.161; 247-255p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1791
dc.description.abstractThe aluminum concentration in the marine sediments has long been considered an indicator of terrigenous abundance. The Al/Ti values (48.5) of the Central Indian Basin subsurface siliceous sediment are up to three times that of Post-Archean Australian Shale (PAAS). The estimation of structurally unsupported Al (Al sub(ex)) from six sediment cores suggests that an average of 40% of total Al is from noncrustal sources. Higher Al/Ti or Al sub(ex) values are often, but not exclusively, associated with abundant volcanic unaltered glass shards. Electron microprobe analysis of 60 of these glass sharde reveals that they are rhyolitic in composition and of Youngest Toba (74 ka) origin from Northern Sumatra. These glass shards have very high Al/Ti ratio of 175 (mean). Al/Ti values are also above the PAAS in sediment where glass shards are absent, which could be due to scavenging of dissolved Al by biogenic components
dc.language.isoen
dc.publisherElsevier
dc.rightsCopyright [1999]. 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.subjectterrigenous sediments
dc.subjectsediment chemistry
dc.subjecttrace metals
dc.subjectaluminium
dc.subjecttitanium
dc.subjectbiogenic deposits
dc.titleExcess aluminum in deep sea sediments of the Central Indian Basin
dc.typeJournal Article


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