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Submarine landslides on a carbonate platform slope changing transport pathways of deepwater gravity flows: Insights from the Xisha Islands, South China Sea

文献类型：期刊论文

作者Liu, Gang5,6; Wang, Dawei3,4; Chen, Wanli3,4,6; Wang, Weiwei2; Betzler, Christian1; Han, Xiaohui5,6
刊名GEOMORPHOLOGY
出版日期2023-09-15
卷号437页码:16
ISSN号0169-555X
关键词Carbonate platform Xisha Islands Submarine landslide Submarine canyon Channel system Gravity flows
DOI10.1016/j.geomorph.2023.108813
通讯作者Wang, Dawei(wangdawei@idsse.ac.cn) ; Chen, Wanli(chenwl@idsse.ac.cn)
英文摘要Landslides frequently block rivers, forming a barrier lake, resulting in a dam break event in the terrestrial environment. However, reports about the submarine landslides are scarce. Herein, the periplatform submarine landslides changing transport pathways of deepwater gravity flows within the southeastern region out of Xuande Atoll on the Xisha Islands, South China Sea, are described. Submarine landslides, including SL I and SL II, with a total area of 170.9 km2, were identified using up-to-date geophysical data, including multi-beam bathymetric and seismic data and sediment gravity cores. SL I directly connects the Sansha Canyon forming a large-scale negative relief with an area of 151.8 km2, developing the terraces, and transporting blocks and remnant blocks. SL II covers an area of 19.1 km2 and was mainly deposited on the deepwater plain with a toe part that is higher than the initial seafloor. The negative relief created by SL I on the seafloor forms the dominant pathways for the gravity flows, creating the new active channel system directly flowing into the canyon. The turbidity currents flowing along the steep lateral margin of SL II formed the cyclic steps. The remnant submarine landslide deposits on the western canyon margin indicate that SL I previously blocked the canyon and formed a submarine barrier lake, which was then eroded by the gravity flows flowing along with the channel system within SL I and the upstream canyon. Finally, the canyon was formed again, whose axis was "pushed" eastward by SL I. These observations update the evolution model of submarine landslide on a carbonate platform slope and the transport system from the slope to the submarine canyon or the deep basin and clarify the stability of submarine engineering and island-and-reef systems.
WOS关键词GREAT-BARRIER-REEF ; CONTINENTAL-SLOPE ; BAHAMA BANK ; SEISMIC CHARACTERISTICS ; NORTHERN SLOPE ; DAMMED LAKE ; TSUNAMI ; CANYON ; SEDIMENTATION ; ARCHITECTURE
资助项目National Natural Science Foundation of China[42176083] ; Key Laboratory of Marine Geology Resources and Environment of Hainan Province[ZZ [2020] 2019256-01] ; Key Laboratory of Marine Geology Resources and Environment of Hainan Province[HNHYDZZYHJKF017] ; Key Research and Development Program of Hainan Province[ZDYF2020209] ; Key-Area Research and Development Program of Guangdong Province[2020B1111020002] ; Hainan Provincial Natural Science Foundation of China[421QN0963]
WOS研究方向Physical Geography ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:001030601100001
资助机构National Natural Science Foundation of China ; Key Laboratory of Marine Geology Resources and Environment of Hainan Province ; Key Research and Development Program of Hainan Province ; Key-Area Research and Development Program of Guangdong Province ; Hainan Provincial Natural Science Foundation of China
源URL[http://ir.idsse.ac.cn/handle/183446/10377]  
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Wang, Dawei; Chen, Wanli
作者单位1.Univ Hamburg, Inst Geol, Bundesstr 55, D-20146 Hamburg, Germany
2.China Univ Petr East China, Coll Control Sci & Engn, Qingdao 266580, Peoples R China
3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China
4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
5.Marine Geol Inst Hainan Prov, Haikou 570206, Peoples R China
6.Key Lab Marine Geol Resources & Environm Hainan Pr, Haikou 570206, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Gang,Wang, Dawei,Chen, Wanli,et al. Submarine landslides on a carbonate platform slope changing transport pathways of deepwater gravity flows: Insights from the Xisha Islands, South China Sea[J]. GEOMORPHOLOGY,2023,437:16.
APA Liu, Gang,Wang, Dawei,Chen, Wanli,Wang, Weiwei,Betzler, Christian,&Han, Xiaohui.(2023).Submarine landslides on a carbonate platform slope changing transport pathways of deepwater gravity flows: Insights from the Xisha Islands, South China Sea.GEOMORPHOLOGY,437,16.
MLA Liu, Gang,et al."Submarine landslides on a carbonate platform slope changing transport pathways of deepwater gravity flows: Insights from the Xisha Islands, South China Sea".GEOMORPHOLOGY 437(2023):16.

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来源：深海科学与工程研究所

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