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Incision of Submarine Channels Over Pockmark Trains in the South China Sea

文献类型：期刊论文

作者Yu, Kaiqi6,7,8; Miramontes, Elda1,5; Alves, Tiago M.4; Li, Wei6,7,8; Liang, Linlin3,6; Li, Shuang6,7,8; Zhan, Wenhuan6,7,8; Wu, Shiguo2,6
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2021-12-28
卷号48期号:24页码:13
ISSN号0094-8276
DOI10.1029/2021GL092861
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.
WOS关键词SEDIMENT-TRANSPORT PROCESSES ; DANISH NORTH-SEA ; CONTINENTAL-MARGIN ; QIONGDONGNAN BASIN ; CANYON ; MORPHOLOGY ; EVOLUTION ; FLOW ; ARCHITECTURE ; CIRCULATION
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)
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 Bremen, Fac Geosci, Bremen, Germany
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
3.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China
4.Cardiff Univ, 3D Seism Lab, Sch Earth & Environm Sci, Main Bldg, Cardiff, Wales
5.Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany
6.Univ Chinese Acad Sci, Beijing, Peoples R China
7.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China
8.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
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.

入库方式： OAI收割

来源：深海科学与工程研究所

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