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Alkenones and fossil

Tang Yunqian; Zheng Shilong(Second Institute of Oceanography,SOA,Hangzhou, 310012 )Shi Jiyang(Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou, 510640 )  
C37 -C39 long chain unsaturated ketones (alkenones)were indentified of a core sample from the South China Sea. The carbon number distribution indicates that these compounds are derived from the Pyrmnesiophyte alga Emiliania huxleyi, which is the predominant coccolithophorid in these samples.Fluctuations in the unsaturated value of carbon 37 alkenone(U37k)show correlations with the glacial/interglacial cycles record in 618O values for planktonic foraminifera.The paleotemperature of Sea water estimated from U37k is lower than the actual annual average temperature of sea water.
【Fund】: 国家自然科学基金 国家有机地球化学重点实验室资助
【CateGory Index】: Q915.2
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