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Carbonate preservation during the 'mystery interval' in the northern Indian Ocean

DRS at CSIR-National Institute of Oceanography

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Title Carbonate preservation during the 'mystery interval' in the northern Indian Ocean
 
Creator Naik, S.S.
Naidu, P.D.
 
Subject Geology and Geophysics
Chemistry and Biogeochemistry
Foraminifera
Chemical composition
Carbonate
Sediments
ISW, Indian Ocean
 
Description To understand carbonate dissolution and/or preservation on the sea floor since the Last Glacial Maximum (LGM), we measured shell weights of planktonic foraminifera Globigerinoides ruber from four sediment cores retrieved from different water depths (~800 to 3300 m) across the northern Indian Ocean G ruber shell weight pattern shows an overall decrease starting from the LGM, with a spike, also termed as the 'mystery interval', during the early deglaciation (~17.5 to 14.5 ka) This shell weight maximum is a feature noted across the world oceans and considered to signify carbonate preservation, although it is missing from many sediment cores from the eastern equatorial Pacific, tropical Atlantic and subtropical Indian Ocean The carbonate preservation spike during deglaciation in the northern Indian Ocean documented in this study suggests increased deep-water carbonate ion concentrations during the early deglaciation which in turn favored preservation This study sheds new light on the preservation of carbonate and associated deep water circulation during deglaciation in the northern Indian Ocean
 
Date 2017-02-17T10:59:30Z
2017-09-30T03:12:38Z
2017-02-17T10:59:30Z
2017-09-30T03:12:38Z
2016
 
Type Journal Article
 
Identifier Geochemical Journal, vol.50(4); 2016; 357-362
0016-7002
http://drs.nio.org/drs/handle/2264/7687
 
Language en
 
Relation Geochem J
SCI
 
Publisher Terra Scientific Publishing Company