| Chen Ronghua,Xu Jian,Meng Yi,Wang Dongjun,Liu Chuanlian,Huang Baoqi,Zhang Fuyuan. 2003. Microfossils, carbonate lysocline and compensation depth in surface sediments of the northeastern South China Sea. Acta Oceanologica Sinica, (4):597－606 |
| Microfossils, carbonate lysocline and compensation depth in surface sediments of the northeastern South China Sea |
| Microfossils, carbonate lysocline and compensation depth in surface sediments of the northeastern South China Sea |
| Received:April 28, 2003 Revised:June 09, 2003 |
| DOI： |
| Key words:Microfossils carbonate lysocline depth carbonate compensation depth (CCD) surface sediments South China Sea (SCS) |
| 中文关键词: Microfossils carbonate lysocline depth carbonate compensation depth (CCD) surface sediments South China Sea (SCS) |
| 基金项目:This study was supported by the Key Laboratory of Submarine Geosciences of State Oceanic Administration under contract No.9903 and the National Natural Science Foundation of China under contract No.49999560. |
| Author Name | Affiliation | | Chen Ronghua | Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China | | Xu Jian | Laboratory of Marine Geology, Tongji University, Shanghai 200092, China | | Meng Yi | Institute of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China | | Wang Dongjun | Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China | | Liu Chuanlian | Laboratory of Marine Geology, Tongji University, Shanghai 200092, China | | Huang Baoqi | Laboratory of Marine Geology, Tongji University, Shanghai 200092, China | | Zhang Fuyuan | Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: |
| Based on the quantitative analyses of abundance of planktonic foraminifera,benthic foraminifera,calcareous nannofossils,the ratios of calcareous to siliceous microfossils,and the determination of carbonate contents in the surface sediments of the northeastern South China Sea,it has been found that the carbonate contents,the abundance of planktonic foraminifera and calcareous nannoplankton,and the ratio of calcareous microfossils decrease rapidly while the ratio of the benthic foraminifera to the total foraminiferal fauna,specific value of siliceous microfossils,and the percentage of the agglutinated tests in the benthic foraminiferal fauna increase with the water depth.The results indicate that the microfossils abundance and ratio,and the carbonate content are closely related to the carbonate lysocline and carbonate compensation depth(CCD) in the study area.In addition,the carbonate lysocline and the CCD are different between the southern and northern parts of the South China Sea.Both the lysocline and the CCD are deeper in the south with 2 600 and 3 600 m than in the north with 2 200 and 3 400 m,respectively. |
| 中文摘要: |
| Based on the quantitative analyses of abundance of planktonic foraminifera,benthic foraminifera,calcareous nannofossils,the ratios of calcareous to siliceous microfossils,and the determination of carbonate contents in the surface sediments of the northeastern South China Sea,it has been found that the carbonate contents,the abundance of planktonic foraminifera and calcareous nannoplankton,and the ratio of calcareous microfossils decrease rapidly while the ratio of the benthic foraminifera to the total foraminiferal fauna,specific value of siliceous microfossils,and the percentage of the agglutinated tests in the benthic foraminiferal fauna increase with the water depth.The results indicate that the microfossils abundance and ratio,and the carbonate content are closely related to the carbonate lysocline and carbonate compensation depth(CCD) in the study area.In addition,the carbonate lysocline and the CCD are different between the southern and northern parts of the South China Sea.Both the lysocline and the CCD are deeper in the south with 2 600 and 3 600 m than in the north with 2 200 and 3 400 m,respectively. |
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