| Morphology and evolution of submarine canyons on the northwest South China Sea margin | |
Li, Shuang1,2,3; Alves, Tiago M.4; Li, Wei1,2,3; Wang, Xiujuan5,6,7; Rebesco, Michele8; Li, Jian1,2,3; Zhao, Fang1,2,3 ; Yu, Kaiqi1,2,3; Wu, Shiguo3,9
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| 2022 | |
| 发表期刊 | MARINE GEOLOGY
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| ISSN | 0025-3227 |
| 卷号 | 443页码:12 |
| 通讯作者 | Li, Wei(wli@scsio.ac.cn) |
| 摘要 | Submarine canyons are observed along both passive and active continental margins, but the factors controlling their complex morphology are still poorly understood. Here, we use high-resolution multibeam bathymetric and 2D seismic data to investigate an area of the northwest South China Sea in which 48 submarine canyons are identified. These previously unstudied submarine canyons incise the continental shelf, being located at a water depth between 200 m and 2200 m. Canyon morphology varies from southwest to northeast, namely in what their length and incision depth are concerned. We therefore divide these canyons into four main types: a) Types A, B and C showing a predominant NW-SE direction, and b) Type D canyons striking to the north. By analysing their internal architectures, we propose that submarine canyons along the northwest South China Sea margin were initiated in the Late Miocene by retrogressive slope failure in response to the gradual build-up of sediment on the continental slope. Differences in sediment supply and fault activity are recognised here as the main factors controlling the morphology of the investigated submarine canyons. In addition, recurrent mass-transport deposits (MTDs) fed sediment from the northwest South China Sea margin into the study area, accelerating the filling of the Central Canyon system, a giant submarine canyon located to the south of the investigated continental slope. The discovery of gas fields (LS22-1, LS17-2) and a gas hydrate drilling zone (GMGS5) in the Central Canyon system proves that MTDs comprise good reservoir intervals. Our results contribute to a better understanding of the origin and development of submarine canyons and highlight the role of sediment supply and tectonic events in controlling canyon morphology. |
| 关键词 | South China Sea Continental margin Qiongdongnan Basin Submarine canyons Seafloor morphology |
| DOI | 10.1016/j.margeo.2021.106695 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0104] ; Guangdong Basic and Applied Basic Research Foundation[2020B1515020016] ; Natural Science Foundation of Guangdong Province[2020A1515010497] ; National Scientific Foundation of China[41876054] ; Guangdong Pearl River Talents Program[2017GC010510] ; CAS Pioneer Hundred Talents Program |
| WOS研究方向 | Geology ; Oceanography |
| WOS类目 | Geosciences, Multidisciplinary ; Oceanography |
| WOS记录号 | WOS:000720828900011 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/177255 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Li, Wei |
| 作者单位 | 1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Cardiff Univ, Sch Earth & Environm Sci, 3D Seism Lab, Main Bldg,Pk Pl, Cardiff CF10 3AT, Wales 5.Chinese Acad, Ctr Ocean Megasci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 6.Chinese Acad, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 7.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China 8.Ist Nazl Oceanog & Geofis Sperimentale OGS, Borgo Grotta Gigante 42-C, I-34010 Trieste, Italy 9.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 通讯作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Li, Shuang,Alves, Tiago M.,Li, Wei,et al. Morphology and evolution of submarine canyons on the northwest South China Sea margin[J]. MARINE GEOLOGY,2022,443:12. |
| APA | Li, Shuang.,Alves, Tiago M..,Li, Wei.,Wang, Xiujuan.,Rebesco, Michele.,...&Wu, Shiguo.(2022).Morphology and evolution of submarine canyons on the northwest South China Sea margin.MARINE GEOLOGY,443,12. |
| MLA | Li, Shuang,et al."Morphology and evolution of submarine canyons on the northwest South China Sea margin".MARINE GEOLOGY 443(2022):12. |
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| 1-s2.0-S002532272100（25293KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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