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DISTRIBUTION OF PLANKTONIC FORAMINIFERA IN SURFACE SEDIMENTS FROM SEA AREA EAST OF THE RYUKYU ISLANDS AND THEIR INDICATIONS
Author(s): WU Yong-hua, CHENG Zhen-bo, SHI Xue-fa, LI Xiao-yan, SHI Feng-deng, JU Xiao-hua
Pages: 1-
7
Year: 2007
Issue:
6
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY
Keyword: 浮游有孔虫; 组合分布; 碳酸盐溶解; 西太平洋;
Abstract: 对琉球群岛东部海区123个表层沉积物样品中浮游有孔虫因子分析结果表明,浮游有孔虫组合在溶跃面以上表现为Globigerinoides ruber-Globigerinata glutinata组合,溶跃面以下为Globorotalia inflata-Neogloboquadrina pachyderma (dex.)组合,局部受黑潮影响区域黑潮标志种Pulleniatina obliquiloculata含量相对丰富,为Neogloboquadrina dutertrei-P. obliquiloculata组合;表层沉积物中浮游有孔虫的丰度及组合分布特征对于碳酸盐溶跃面深度及碳酸盐补偿深度有一定的指示意义.另外,碳酸盐保存特征研究表明,该区域现代碳酸盐溶跃面深度约为3 100 m,碳酸盐补偿深度约为4 300 m.
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