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| Deep water bottom current deposition in the northern South China Sea | |
| 作者姓名： | SHAO Lei LI XueJie GENG JianHua PANG Xiong LEI YongChang QIAO PeiJun WANG LiaoLiang & WANG HongBin State Key Laboratory of Marine Geology Tongji University Shanghai China Guangzhou Marine Geological Survey Ministry of Land and Resources Guangzhou China CNOOC Ltd. Shenzhen Shenzhen China |
| 作者单位： | SHAO Lei1，LI XueJie2，GENG JianHua1，PANG Xiong3，LEI YongChang3，QIAO PeiJun1，WANG LiaoLiang2 & WANG HongBin2 1 State Key Laboratory of Marine Geology，Tongji University，Shanghai 200092，China; 2 Guangzhou Marine Geological Survey，Ministry of Land and Resources，Guangzhou 510075，China; 3 CNOOC Ltd. Shenzhen，Shenzhen 518067，China |
| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
| 摘 要： | There are some active bottom currents on the northern continental slope of the South China Sea (SCS). Reflection seismic profiles show that the bottom current channels occur in the water depth range of 1000 to 2700 m,extending from the NE to the SW,leading to accumulation of discontinuous drifts with higher sedimentation rates on the eastern side of the channel. The stacking pattern of the layers sug-gests that these drifts propagated southwestward,following the direction of the bottom currents. One sedimentary drift to the southeast of the Dongsha Islands has the highest sedimentation rate of 97cm/ka in the last 12 ka. The sedimentary characteristics of the sediment layers indicate that these bottom currents are most likley caused by the water movement of a branch of the West Pacific Ocean Current,which enters the northern SCS via the Bashi Strait. Once formed,the bottom currents trans-port sediments along the northern slope of SCS southwestward and finally disappear into the central basin of the SCS. Due to the bottom current activity,the deep-sea sedimentary process in the northern SCS is complex. |
| 收稿时间： | 14 March 2006 |
| 修稿时间： | 31 August 2006 |
Deep water bottom current deposition in the northern South China Sea |
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| SHAO Lei,LI XueJie,GENG JianHua,PANG Xiong,LEI YongChang,QIAO PeiJun,WANG LiaoLiang & WANG HongBin State Key Laboratory of Marine Geology,Tongji University,Shanghai ,China, Guangzhou Marine Geological Survey,Ministry of Land and Resources,Guangzhou ,China, CNOOC Ltd. Shenzhen,Shenzhen ,China.Deep water bottom current deposition in the northern South China Sea[J].Science in China(Earth Sciences),2007,50(7):1060-1066. | |
| Authors: | Shao Lei Li XueJie Geng JianHua Pang Xiong Lei YongChang Qiao PeiJun Wang LiaoLiang Wang HongBin |
| Institution: | 1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China 2. Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou 510075, China 3. CNOOC Ltd. Shenzhen, Shenzhen 518067, China |
| Abstract: | There are some active bottom currents on the northern continental slope of the South China Sea (SCS). Reflection seismic profiles show that the bottom current channels occur in the water depth range of 1000 to 2700 m,extending from the NE to the SW,leading to accumulation of discontinuous drifts with higher sedimentation rates on the eastern side of the channel. The stacking pattern of the layers sug-gests that these drifts propagated southwestward,following the direction of the bottom currents. One sedimentary drift to the southeast of the Dongsha Islands has the highest sedimentation rate of 97cm/ka in the last 12 ka. The sedimentary characteristics of the sediment layers indicate that these bottom currents are most likley caused by the water movement of a branch of the West Pacific Ocean Current,which enters the northern SCS via the Bashi Strait. Once formed,the bottom currents trans-port sediments along the northern slope of SCS southwestward and finally disappear into the central basin of the SCS. Due to the bottom current activity,the deep-sea sedimentary process in the northern SCS is complex. |
| Keywords: | deep water bottom current deep sea deposition sedimentary drift reflection seismic profile South China Sea |
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