Liu Chuanlian et al. (2002): Oxygen and carbon isotope records of calcareous nannofossils for the past 1 Ma in the southern South China Sea

Leg/Site/Hole:
ODP 184
ODP 184 1143
Identifier:
2003-079107
georefid
Creator:
Liu Chuanlian
Tongji University, Shanghai, China
author
Cheng Xinrong
Chinese Academy of Sciences, China
author
Zhu Youhua
author
Tian Jun
author
Xia Peifen
author
Identification:
Oxygen and carbon isotope records of calcareous nannofossils for the past 1 Ma in the southern South China Sea
2002
Chinese Science Bulletin
Science Press, Beijing, China
47
10
798-803
Oxygen and carbon isotopic analyses have been carried out on calcareous nannofossils from ODP Site 1143 in the southern South China Sea. The results demonstrate that the delta (super 18) O values of calcareous nannofossils for the past 1 Ma vary systematically with those of planktonic and benthic foraminifera form the same site. But the average delta (super 18) O value of nannofossils is 1.869 per mil higher than that of planktonic foraminifera, and is 3.855 per mil lower than that of benthic foraminifera. There are systematic differences between the delta (super 13) C values of nannofossils, planktonic foraminifera and benthic foraminifera. The average delta (super 13) C of nannofossils is 0.756 per mil higher than that of benthic foraminifera, and is 0.460 per mil lower than that of planktonic foraminifera. The delta (super 13) C values of nannofossils exhibit a significant positive shift beginning near isotope stage 14 and lasting until stage 8. This study also finds that there is a close relationship between the delta (super 13) C of nannofossils and the percentage of Florisphaera profunda. This implies that the delta (super 13) C of nannofossils can be used as an indicator of sea water surface paleoproductivity.
English
Serial
Coverage:Geographic coordinates:
North:9.2143
West:113.1707East: 113.1707
South:9.2143
Quaternary geology; Isotope geochemistry; algae; benthic taxa; C-13/C-12; carbon; Cenozoic; Foraminifera; geochemical indicators; geochemistry; Holocene; Invertebrata; isotope ratios; isotopes; Leg 184; microfossils; middle Pleistocene; nannofossils; North Pacific; Northwest Pacific; O-18/O-16; Ocean Drilling Program; ODP Site 1143; oxygen; Pacific Ocean; paleo-oceanography; paleoclimatology; paleoenvironment; paleoproductivity; planktonic taxa; Plantae; Pleistocene; Protista; Quaternary; South China Sea; stable isotopes; West Pacific;
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