Incision of Submarine Channels Over Pockmark Trains in the South China Sea | |
Yu, Kaiqi1,2,3; Miramontes, Elda4,8; Alves, Tiago M.5; Li, Wei1,2,3; Liang, Linlin1,7; Li, Shuang1,2,3; Zhan, Wenhuan1,2,3; Wu, Shiguo1,6 | |
刊名 | GEOPHYSICAL RESEARCH LETTERS |
2021-12-28 | |
卷号 | 48期号:24页码:13 |
ISSN号 | 0094-8276 |
DOI | 10.1029/2021GL092861 |
通讯作者 | Li, Wei |
英文摘要 | The genesis of submarine channels is often controlled by gravity flows, but channels can also be formed by oceanographic processes. Using multibeam bathymetry and two-dimensional seismic data from the western South China Sea, this study reveals how pockmarks can ultimately form channels under the effect of bottom currents and gravity-driven sedimentary processes. We demonstrate that alongslope and across-slope channels were initiated by pockmark trains on the seafloor. Discrete pockmarks were elongated due to the erosion of gravity-driven sedimentary processes and bottom currents, and later coalesced to form immature channels with irregular thalwegs. These gradually evolved into mature channels with continuous overbanks and smooth thalwegs. Submarine channel evolution was significantly influenced by seafloor topography since the Late Miocene. The evolutionary model documented here is a key to understanding how channels are formed in deep-water environments. Plain Language Summary Submarine channels are prominent erosional features on continental slopes and basin floors. They are usually formed by ocean currents flowing alongslope and sediment avalanches flowing downslope. Here, we investigate a system of channels on the western South China Sea using geophysical methods. The channels are formed in a region with widespread seafloor depressions (pockmarks) formed by the seepage of fluid into the water column. Gravity-driven sedimentary processes and ocean currents reshaped these pockmarks, which were ultimately merged together to form immature and irregular channels. Under continued erosion, the immature channels eventually developed mature channels with continuous overbanks and smooth channel floors. This study reveals that ocean currents and gravity processes can form channels with different orientations by eroding pre-existing pockmarks. |
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] ; National Natural Scientific Foundation of China[41876054] ; CAS Pioneer Hundred Talents Program[Y8SL011001] ; University of Chinese Academy of Sciences (UCAS) |
WOS关键词 | SEDIMENT-TRANSPORT PROCESSES ; DANISH NORTH-SEA ; CONTINENTAL-MARGIN ; QIONGDONGNAN BASIN ; CANYON ; MORPHOLOGY ; EVOLUTION ; FLOW ; ARCHITECTURE ; CIRCULATION |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | AMER GEOPHYSICAL UNION |
WOS记录号 | WOS:000735897000012 |
资助机构 | Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Guangdong Basic and Applied Basic Research Foundation ; National Natural Scientific Foundation of China ; CAS Pioneer Hundred Talents Program ; University of Chinese Academy of Sciences (UCAS) |
内容类型 | 期刊论文 |
源URL | [http://ir.idsse.ac.cn/handle/183446/9373] |
专题 | 深海科学研究部_深海地球物理与资源研究室 |
通讯作者 | Li, Wei |
作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China 4.Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany 5.Cardiff Univ, 3D Seism Lab, Sch Earth & Environm Sci, Main Bldg, Cardiff, Wales 6.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China 7.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 8.Univ Bremen, Fac Geosci, Bremen, Germany |
推荐引用方式 GB/T 7714 | Yu, Kaiqi,Miramontes, Elda,Alves, Tiago M.,et al. Incision of Submarine Channels Over Pockmark Trains in the South China Sea[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(24):13. |
APA | Yu, Kaiqi.,Miramontes, Elda.,Alves, Tiago M..,Li, Wei.,Liang, Linlin.,...&Wu, Shiguo.(2021).Incision of Submarine Channels Over Pockmark Trains in the South China Sea.GEOPHYSICAL RESEARCH LETTERS,48(24),13. |
MLA | Yu, Kaiqi,et al."Incision of Submarine Channels Over Pockmark Trains in the South China Sea".GEOPHYSICAL RESEARCH LETTERS 48.24(2021):13. |
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