Liu Chuanlian; Cheng Xinrong; Wang Rujian; Jian Zhimin; Wu Xiaoguang (2005): Oxygen and carbon isotope records of Quaternary calcareous nannofossils from the West Pacific Warm Pool and their paleo-oceanographic significance. China University of Geoscience, Wuhan, China, Earth Science. Journal of China University of Geoscience, 30 (5), 559-564, 603, georefid:2009-041322
Abstract:
Oxygen and carbon isotopic analyses have been carried out on calcareous nannofossils from core MD97-2140 in the Western Pacific Warm Pool. The results demonstrate that the delta (super 18) O values of calcareous nannofossils for the past 1.75 Ma vary systematically with delta (super 18) O values of planktonic foraminifer Globigerinoides ruber from the same core. The delta (super 18) O records of calcareous nannofossils show a dominant 41 ka peak between 1478 and 900 ka and a 100 ka peak between 850 and 6 ka, and 59 isotope stages can be recognized. The similarities between delta (super 18) O records of planktonic foraminifera and nannofossils imply that calcareous nannofossil delta (super 18) O can also play an important role in stratigraphic and palaeo-oceanographic studies. The delta (super 13) C records of nannofossils can be divided into four major stages at 900 ka, 480 ka and 250 ka. The trends in nannofossil delta (super 13) C records from MD97-2140 are similar to primary productivity variations at ODP Site 807, also located in the Western Pacific Warm Pool, indicating that nannofossil delta (super 13) C can be used as an indicator of sea-surface palaeoproductivity.
Coverage:
West: 141.4600 East: 141.4600 North: 2.0300 South: 2.0300
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