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[D-1.2.1 Research on Long-term Change of Element Cycles in Ocean based on Chemical Components]

[Contact Person]

Takejiro Takamatsu
Section of Soil Environment
Water and Soil Environment Division,
National Institute for Environmental Studies
16-2 Onogawa, Tsukuba, lbaraki 305, Japan

[Total Budget for FY1990-1992]

15,058,000 Yen

[Abstract]

　Sediment core(GC1002) taken in the Enderby Land in Antarctic ocean was used. Planktonic foraminifers were isolated under microscope and age determination by ¹⁴C was conducted using by Tandetron accelerator Mass-spectrometer. It was found that age of core in 10-12cm depth was 20,000±610 years. Also it was found from the correlation analysis of Ca and Al measured by neutron activation method that biogenic sedimentation flux was composed of calcium carbonate rather than opal.

[Key Words]

Element cycle, Trace metals, Antarctic Ocean, Sediment core, Foraminifera