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Carbonate and organic carbon content changes over last 20 ka in the Southeastern Arabian Sea: Paleoceanographic implications

DRS at CSIR-National Institute of Oceanography

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Title Carbonate and organic carbon content changes over last 20 ka in the Southeastern Arabian Sea: Paleoceanographic implications
 
Creator Narayana, A.C.
Naidu, P.D.
Shinu, N.
Nagabhushanam, P.
Sukhija, B.S.
 
Subject palaeoceanography
calcium carbonate
sediment texture
organic carbon
 
Description Two Gravity cores (AAS 38-4 and AAS 38-5) recovered from the eastern Arabian Sea were analyzed for calcium carbonate (CaCO3), organic carbon, aluminium (Al) and titanium (Ti) in order to understand the calcium carbonate and terrigenous fluctuations during the Holocene and Last Glacial Period. High CaCO sub(3) and low Al and Ti during the Holocene, and low CaCO sub(3) and high Al and Ti during the Last Glacial Period suggest that CaCO sub(3) content in these two cores appears to be controlled by the dilution of terrigenous material. The supply of terrigenous material to the core sites was higher during the Last Glacial Period than in the Holocene. Organic carbon values were lower (2%) during the Last Glacial Period in core AAS 38-4; but the opposite was found in core AAS 38-5. This inconsistent pattern of organic carbon changes in the two cores studied indicates that the distribution of organic carbon in the eastern Arabian Sea is controlled not only by the supply of organic matter from the water column but also by sediment texture and dilution of sediment components
 
Date 2009-12-21T06:42:01Z
2009-12-21T06:42:01Z
2009
 
Type Journal Article
 
Identifier Quaternary International, vol.206(1-2); 72-77
http://drs.nio.org/drs/handle/2264/3484
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2009] Elsevier
 
Publisher Elsevier