晚上新世以来南海北部深部水团演化

黄宝琦; 翦知湣; 赵泉鸿; 汪品先

晚上新世以来南海北部深部水团演化

1.
北京大学地球与空间科学学院，北京 100871
2.
同济大学海洋地质国家重点实验室，上海 200092

基金项目:

国家自然科学基金项目 40306007

国家自然科学基金项目 2000078502

中国科学院现代古生物学和地层学国家重点实验室项目 033109

详细信息

作者简介:
黄宝琦(1972)，女，博士，主要从事古海洋学研究.E-mail：baoqih@pku.edu.cn

中图分类号: P53; P73
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出版历程
- 收稿日期: 2005-06-29
- 刊出日期: 2005-09-25

Variations in Deep-Water Masses from the Northern South China Sea since the Late Pliocene

1.
School of Earth and Space Sciences, Peking University, Beijing 100871, China
2.
State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

摘要

摘要: 对南海北部大洋钻探184航次1146站晚上新世以来底栖有孔虫属种组合的Q型因子分析, 发现底栖有孔虫组合以2.1Ma, 1.5Ma和0.7Ma为界, 分为Stilostomella-Globocassidulina subglobosa-Nodogenerina, Bulimina alazanensis, Uvigerina perigrina和Melonis barleeanus-Globobulimina affinis-Bulimina aculeata4个组合.结合底层水溶解氧含量和浮游、底栖有孔虫碳同位素分析, 认为底栖有孔虫组合的变化是南海底层水影响所致, 以及南海北部表层和底层海水营养盐含量变化的共同结果.
- 晚上新世 /
- 南海北部 /
- 深部水团 /
- 底栖有孔虫组合
Abstract: Through the Q-mode factor analysis of benthic foraminifera from ODP Site 1146 in the northern South China Sea since 4 Ma, we identified four assemblages of benthic foraminifera. These are the Stilostomella-Globocassidulina subglobosa-Nodogenerina assemblage, the Bulimina alazanensis assemblage, the Uvigerina perigrina assemblage, and the Melonis barleeanus-Globobulimina affinis-Bulimina aculeata assemblage, divided respectively at 2.1 Ma, 1.5 Ma and 0.7 Ma. Combined with the results of the benthic foraminiferal oxygen index (BFOI) and carbon isotopes of planktonic and benthic foraminifera, we consider that the variations in the benthic foraminiferal assemblages in the area were mainly controlled by nutrient changes in surface and bottom waters.
- Late Pliocene /
- northern South China Sea /
- deep water mass /
- assemblages of benthic foraminifera

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图 1 ODP 1146站底栖有孔虫Q型因子分析结果

Fig. 1. Q-mode factor analysis results of benthic foraminifera from ODP 1146

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图 2 ODP 1146站底栖有孔虫溶解氧指数与ODP 1148站碳同位素值比较(Zhao et al., 2001)

Fig. 2. Comparison between benthic foraminifer oxygen index from ODP 1146 and δ¹³C from ODP 1148

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