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Variation of paleo-productivity and terrigenous input in the eastern Arabian Sea during the past 100 ka

DRS at CSIR-National Institute of Oceanography

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Title Variation of paleo-productivity and terrigenous input in the eastern Arabian Sea during the past 100 ka
 
Creator Ishfaq, A.M.
Pattan, J.N.
Matta, V.M.
Banakar, V.K.
 
Subject sediment composition
core analysis
terrigenous sediments
 
Description A 4.1m long sediment core from the eastern Arabian Sea is studied using multiple geochemical proxies to understand the variation of productivity and terrigenous matter supply during the past 100 ka. The temporal variation in element concentration and fluxes of CaCO3, organic carbon (C sub(org)) and Barium excess (Ba sub(exc)), together, in general indicate a higher productivity during the cold climate and highest during the Last Glacial Maximum in particular. This cold climate-increased productivity coupling may be attributed to the shoaling of nutricline due to enhanced convective mixing resulting from the intensified winter monsoon. Increased linear sedimentation rates and fluxes of Al, Fe, Mg, Ti, Cr, Cu, Zn, and V during the cold period also suggest increased in put of terrigenous matter supporting intensified winter winds. However, the presence of large abundance of structurally unsupported elemental content (e.g. Mg-86%, Fe-82% and Al-53%) indicate increased input of terrigenous material which was probably enhanced due to intense winter monsoon.
 
Date 2013-06-17T06:36:30Z
2013-06-17T06:36:30Z
2013
 
Type Journal Article
 
Identifier Journal of the Geological Society of India, vol.81(5); 2013; 647-654
http://drs.nio.org/drs/handle/2264/4305
 
Language en
 
Rights Copyright [2013] the Geological Society of India. 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 Geological Society of India