Volume 5, No. 2, June 2019

General Information

  • ISSN: 2395-647X (Online)
  • Abbreviated Title:  Int. J. Geol. Earth Sci.
  • Editor-in-Chief: ​Prof. Marina Fernandez de la Cruz, Department of Petrology and Geochemistry, Faculty of Geological Sciences, Complutense University of Madrid, Spain
  • Associate Editor: Sujitha R. Reddy, Savitha Darsha
  • Executive Editor: Ms. Yoyo Y. Zhou
  • DOI: 10.18178/ijges
  • Abstracting/Indexing: GeoRef (Elsevier), Crossref, Google Scholar, Genamics, Eurasian Scientific Journal Index (ESJI), etc.
  • E-mail questions to IJGES Editorial Office.

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International Journal of Geology and Earth Sciences
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Paleoproductivity Changes in the Southern South China Sea from the Last Glacial to the Holocene: Evidence from Stable Isotopes and Total Organic Carbon

Dhanushka Devendra1,2, Rong Xiang1, Vidusanka Thilakanayaka1,2, Pavani Vithana1,2, Sazal kumar1,2, and Zhang Lingzhi1,2
1.Key Laboratory of Ocean and Marginal Sea Geology, Chinese Academy of Science, South China Sea Institute of Oceanology, Guangzhou 510301, China
2.University of Chinese Academy of Sciences, Beijing 100049, China

Abstract—We reconstruct paleoproductivity changes during the past 37 kyr BP, from the southern South China Sea. We used productivity proxies such as planktonic and benthic foraminiferal stable isotope, total organic carbon, the relative abundance of Globigerina bulloides, and absolute abundance of planktonic foraminifera. The comparison between productivity proxies and previously published records suggest that 13C records of planktonic and benthic foraminifera responds better to surface water productivity changes and represent as a suitable proxy for paleoproductivity reconstructions. The faunal and geochemical proxies suggest that productivity in the South China Sea was higher during the Heinrich stadial. The planktonic and benthic 13C signals suggest overall low productivity, before the LGM (~24-22 kyr BP) and then increase subsequently. Furthermore, our records show that organic carbon content in the sediment has an oceanic origin and preservation of the organic matter depends on the sedimentation rates.

Index Terms—Paleoproductivity, Stable isotopes, Total organic carbon, South China Sea

Cite:Dhanushka Devendra, Rong Xiang, Vidusanka Thilakanayaka, Pavani Vithana, Sazal kumar, and Zhang Lingzhi, "Paleoproductivity Changes in the Southern South China Sea from the Last Glacial to the Holocene: Evidence from Stable Isotopes and Total Organic Carbon," International Journal of Geology and Earth Science, Vol. 5, No. 2, pp. 1-14, June 2019. doi: 10.18178/ijges.5.2.1-14