Mass movements in small canyons in the northeast of Baiyun deepwater area, north of the South China Sea

doi:10.1007/s13131-015-0702-z

	Mass movements in small canyons in the northeast of Baiyun deepwater area, north of the South China Sea
	Li Xishuang 1; Liu Lejun 1; Li Jiagang 2; Gao Shan 1; Zhou Qingjie 1; Su Tianyun 1
刊名	ACTA OCEANOLOGICA SINICA
	2015-08
卷号	34 期号:8 页码:35-42
关键词	mass movement geophysical data trigger mechanism submarine canyon north of the South China Sea
ISSN号	0253-505X
DOI	10.1007/s13131-015-0702-z
英文摘要	The process of mass movements and their consequent turbidity currents in large submarine canyons has been widely reported, however, little attention was paid to that in small canyons. In this paper, we document mass movements in small submarine canyons in the northeast of Baiyun deepwater area, north of the South China Sea (SCS), and their strong effects on the evolution of the canyons based on geophysical data. Submarine canyons in the study area arrange closely below the shelf break zone which was at the depth of-500 m. Within submarine canyons, seabed surface was covered with amounts of failure scars resulted from past small-sized landslides. A complex process of mass transportation in the canyons is indicated by three directions of mass movements. Recent mass movement deposits in the canyons exhibit translucent reflections or parallel reflections which represent the brittle deformation and the plastic deformation, respectively. The area of most landslides in the canyons is less than 3 km(2). The trigger mechanisms for mass movements in the study area are gravitational overloading, slope angle and weak properties of soil. Geophysical data indicate that the genesis of submarine canyons is the erosion of mass movements and consequent turbidity currents. The significant effects of mass movements on canyon are incision and sediment transportation at the erosion phases and fillings supply at the fill phases. This research will be helpful for the geological risk assessments and understanding the sediment transportation in the northern margin of the SCS.
资助项目	National Science and Technology Major Project[2011ZX05056-001-02]
WOS关键词	SUBMARINE CANYONS ; CONTINENTAL-MARGIN ; LANDSLIDES ; EARTHQUAKE ; EVOLUTION ; TRANSPORT ; SLIDES ; SLOPE ; MORPHOLOGY ; SYSTEM
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000358962200005
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/27203]
专题	自然资源部第一海洋研究所
通讯作者	Li Xishuang
作者单位	1.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 2.China Natl Offshore Oil Corp, Res Ctr, Beijing 100027, Peoples R China
推荐引用方式 GB/T 7714	Li Xishuang,Liu Lejun,Li Jiagang,et al. Mass movements in small canyons in the northeast of Baiyun deepwater area, north of the South China Sea[J]. ACTA OCEANOLOGICA SINICA,2015,34(8):35-42.
APA	Li Xishuang,Liu Lejun,Li Jiagang,Gao Shan,Zhou Qingjie,&Su Tianyun.(2015).Mass movements in small canyons in the northeast of Baiyun deepwater area, north of the South China Sea.ACTA OCEANOLOGICA SINICA,34(8),35-42.
MLA	Li Xishuang,et al."Mass movements in small canyons in the northeast of Baiyun deepwater area, north of the South China Sea".ACTA OCEANOLOGICA SINICA 34.8(2015):35-42.