Large-scale scours formed by supercritical turbidity currents along the full length of a submarine canyon, northeast South China Sea
文献类型：期刊论文
| 作者 | Li, Shuang2,3; Li, Wei2,3; Alves, Tiago M.; Wang, Jiliang1; Feng, Yingci2,3; Sun, Jie2,3; Li, Jian2,3; Wu, Shiguo1 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2020 |
| 卷号 | 424页码:106158 |
| 关键词 | South China Sea Scours Cyclic steps Submarine canyon Geomorphology Coriolis force |
| ISSN号 | 1872-6151 |
| DOI | 10.1016/j.margeo.2020.106158 |
| 英文摘要 | High-resolution multibeam bathymetric and seismic data enables a detailed morphological investigation of a submarine canyon (West Penghu Canyon) on the northeastern South China Sea margin, where twenty-three (23) scours are observed along the canyon thalweg. These scours form narrow topographic depressions in plan view and show asymmetrical morphologies in cross-section. The identified scours can be further divided into two groups (Types A and B) based on their sizes and relative locations. They are separated by a slope break at a water depth of similar to 2850 m. Type A scours (S1-S18) occur upslope from the slope break, whereas Type B scours (S19-S23) lie downslope from this same break. The scours are interpreted as net-erosional cyclic steps associated with turbidity currents flowing through the West Penghu Canyon; the currents that form Type A scours reflect higher V, Q, and Delta(el) compared to the currents forming Type B scours. A change in slope gradient and loss of lateral confinement are proposed to control the change from Type A to Type B scours. Furthermore, Coriolis force influences the flow direction of turbidity currents, leading to the preferential development and larger incision depths of scours towards the southwestern flank of the West Penghu Canyon. Our results contribute to a better understanding on the origin of scours in submarine canyons across the world. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18544]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Alves, Tiago M.] Cardiff Univ, Sch Earth & Ocean Sci, 3D Seism Lab, Main Bldg,Pk Pl, Cardiff CF10 3AT, Wales 2.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510301, Peoples R China 5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shuang,Li, Wei,Alves, Tiago M.,et al. Large-scale scours formed by supercritical turbidity currents along the full length of a submarine canyon, northeast South China Sea[J]. MARINE GEOLOGY,2020,424:106158. |
| APA | Li, Shuang.,Li, Wei.,Alves, Tiago M..,Wang, Jiliang.,Feng, Yingci.,...&Wu, Shiguo.(2020).Large-scale scours formed by supercritical turbidity currents along the full length of a submarine canyon, northeast South China Sea.MARINE GEOLOGY,424,106158. |
| MLA | Li, Shuang,et al."Large-scale scours formed by supercritical turbidity currents along the full length of a submarine canyon, northeast South China Sea".MARINE GEOLOGY 424(2020):106158. |
入库方式： OAI收割
来源：南海海洋研究所
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