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Organic  Material  of High  CIN  Ratio and  Heavy  Metals Recorded in Ishikari  Bay  Sediment

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  • 石狩湾堆積物 中の 高 い C/N 比の 有機物 と重金属
  • イシカリワン タイセキブツ チュウ ノ タカイ C Nヒ ノ ユウキブツ ト ジュウキンゾク

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Sediment core of 40cm long was taken using a gravity corer at 43°30'N, 14°20'E in Ishikari Bay, Hokkaido. Sedimentation rate was determined to be 0.58g/cm^2/yr by Cs-137. Organic materials having Org. C/Org. N ratio of 20 were accumulated at 11.5-29.5cm depth. C-14 age of this organic material was about 10,000yrs and hydrogen peroxides soluble Fe, Cu, Zn and Cr were found in the layer. These metals were transported into Ishikari Bay with the old-organic material. Upper 11.5cm, Org. C/Org. N ratio decreased to 10-15.


  • Bulletin on Coastal Oceanography

    Bulletin on Coastal Oceanography 41 (1), 53-60, 2003

    Coastal Oceanography Research Committee, the Oceanographic Society of Japan

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