Record Details

Excess aluminum in deep sea sediments of the Central Indian Basin

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Excess aluminum in deep sea sediments of the Central Indian Basin
 
Creator Pattan, J.N.
Shane, P.
 
Subject terrigenous sediments
sediment chemistry
trace metals
aluminium
titanium
biogenic deposits
 
Description The 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
 
Date 2009-01-10T11:15:58Z
2009-01-10T11:15:58Z
1999
 
Type Journal Article
 
Identifier Marine Geology, Vol.161; 247-255p.
http://drs.nio.org/drs/handle/2264/1791
 
Language en
 
Rights Copyright [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.
 
Publisher Elsevier