Characteristics and genetic analysis of submarine landslides in the northern slope of the South China Sea

doi:10.1007/s11001-018-9369-0

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Characteristics and genetic analysis of submarine landslides in the northern slope of the South China Sea
	Zhou, Qingjie 2,3,4; Li, Xishuang 1,4; Zhou, Hang 2,4; Liu, Lejun 2,4; Xu, Yuanqin 2,4; Gao, Shan 2,4; Ma, Long 2,4
刊名	MARINE GEOPHYSICAL RESEARCH
	2019-09-01
卷号	40 期号:3 页码:303-314
关键词	Northern South China Sea Submarine landslide Slope stability
ISSN号	0025-3235
DOI	10.1007/s11001-018-9369-0
通讯作者	Zhou, Qingjie(zhouqj@fio.org.cn)
英文摘要	Although the structural characteristics and triggering mechanisms of submarine landslides have been investigated, little attention has been paid toward the submarine landslides in canyons. In the Baiyun canyon, there are many small submarine landslides that could be an important sediment transport process of the canyons, but few have been studied. This study aims to examine the characteristics and mechanisms of submarine landslides in the Baiyun canyon on the northern continental slope of the South China Sea using multibeam depth data, acoustic sub-bottom profiles, and borehole data. The results suggest that the submarine landslides are mainly distributed in the head and side valley walls of the canyons. The surface morphology of the landslides is broken-stepped, tongued, or round, and the area of the landslides varies between 0.04 and 15.13 km(2). Nevertheless, most of the landslides have an area of less than 2 km(2). The scarp height of most landslides is between 20 and 40 m. Based on the internal acoustic structures of the landslides, the submarine landslides can be divided into brittle and plastic. The brittle landslides have clear landslide walls or sliding surfaces, whereas the interior of the landslides in the upper slope area of 650-740 m near the source of submarine canyon has the original stratigraphic structure. The interior of the plastic landslides is typically chaotic and has no clear landslide walls or sliding surfaces. The plastic landslides mainly occur in the head and sides of the canyon. We determined the slope stability using the software GeoSlope and concluded that the strength of the soil on the seabed slopes and the slope gradient are the main factors that control the landslides in the study area. Landslides occur when the slope gradient is greater than 9 degrees. In addition, when the horizontal seismic load is not zero, slopes with a gradient of less than 9 degrees are unstable. This study will be helpful in geological risk assessments and understanding of sediment transportation in the northern margin of the Northern South China Sea.
资助项目	National Program on Global Change and Air-Sea Interaction[GASI-GEO-GE-05] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2018KG10] ; National Key Research and Development Program of China[2016YFB0501703] ; National Key Research and Development Program of China[2016YFB0501700] ; National Natural Science Foundation of China[41506071] ; Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; Taishan Scholar Project Funding[tspd20161007]
WOS研究方向	Geochemistry & Geophysics ; Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000485311600004
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/162777]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Zhou, Qingjie
作者单位	1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Shandong, Peoples R China 2.Natl Oceanog Lab, Funct Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China 4.SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Qingjie,Li, Xishuang,Zhou, Hang,et al. Characteristics and genetic analysis of submarine landslides in the northern slope of the South China Sea[J]. MARINE GEOPHYSICAL RESEARCH,2019,40(3):303-314.
APA	Zhou, Qingjie.,Li, Xishuang.,Zhou, Hang.,Liu, Lejun.,Xu, Yuanqin.,...&Ma, Long.(2019).Characteristics and genetic analysis of submarine landslides in the northern slope of the South China Sea.MARINE GEOPHYSICAL RESEARCH,40(3),303-314.
MLA	Zhou, Qingjie,et al."Characteristics and genetic analysis of submarine landslides in the northern slope of the South China Sea".MARINE GEOPHYSICAL RESEARCH 40.3(2019):303-314.