Calcium Carbonate contents of Deep Sea Sediment in Equatorial Region

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  • 赤道海域の深海堆積物にふくまれるCaCO<SUB>3</SUB>について
  • 赤道海域の深海堆積物にふくまれるCaCO3について
  • セキドウ カイイキ ノ シンカイ タイセキブツ ニ フクマレル CaCO3 ニ ツイテ

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Abstract

1. Calcium carbonate content of deep sea sediment decreases abruptly in deeper bottom than 4000-5000 meters. The temperature, pH, chlorinity, oxygen content and calcium concentration of sea water indicate that the abrupt decreasing of CaCO3 is probably not due to these characters of deep sea water.<BR>2. Calcium carbonate content of deep sea sediment in the equatorial region is highest in the region from Lat. 4 to 8 N, and decreases both in north and south of it. This region corresponds to area of Equatorial Counter Current. The correspondense of the boundary of current to the distinct changing of CaCO3 content of deep sea sediment suggests that the sinking current originated in current rip reaches to deep water.

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