Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea

doi:10.3969/j.issn.0001-5733.2011.12.018

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

	Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea
	Wu Shi-Guo 1; Qin Zhi-Liang 1,2; Wang Da-Wei 1; Peng Xue-Chao 3; Wang Zhi-Jun 4; Yao Gen-Shun 5; Wu, SG (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-12-01
卷号	54 期号:12 页码:3184-3195
关键词	Mass Transport Deposits Gravity Flow Seafloor Instability Gas Hydrate Submarine Landslide South China Sea
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.12.018
文献子类	Article
英文摘要	Mass transport deposits (MTDs) are one kind of deepwater sedimentary system driven by the gravity flow action, and play an important role in the deep-water sedimentation in the global continental margins. MTDs are not only one of the most serious deep-water geo-hazards, but also have close relationships with the formation and accumulation of marine gas hydrates and deepwater hydrocarbon. Based on the topographic and high resolution seismic data in the hydrocarbon exploration region, we reveal the discerned characteristics and distribution of the MTDs in the northern slope of the South China Sea. The MTDs are characterized by apparent geomorphology and sedimentary structures. The head of MTDs has well developed extensional fault; the middle of MTDs has slide and turnover block; in the toe region of MTDs occurred compressive structures and thrust faults. Several mechanisms can induce the development of MTDs. However, Baiyun MTDs were inferred to be dominated by the dissociation of gas hydrate after we have analyzed the model of gas hydrate reservoirs and numerical modeling by using elastic-plastic finite element method for the MTDs in the Baiyun sag. We calculated 6 sets of safety factors with 6 different dissociation levels of gas hydrate, and found that with the increasing dissociation of gas hydrate, the stability of submarine slope decreases.; Mass transport deposits (MTDs) are one kind of deepwater sedimentary system driven by the gravity flow action, and play an important role in the deep-water sedimentation in the global continental margins. MTDs are not only one of the most serious deep-water geo-hazards, but also have close relationships with the formation and accumulation of marine gas hydrates and deepwater hydrocarbon. Based on the topographic and high resolution seismic data in the hydrocarbon exploration region, we reveal the discerned characteristics and distribution of the MTDs in the northern slope of the South China Sea. The MTDs are characterized by apparent geomorphology and sedimentary structures. The head of MTDs has well developed extensional fault; the middle of MTDs has slide and turnover block; in the toe region of MTDs occurred compressive structures and thrust faults. Several mechanisms can induce the development of MTDs. However, Baiyun MTDs were inferred to be dominated by the dissociation of gas hydrate after we have analyzed the model of gas hydrate reservoirs and numerical modeling by using elastic-plastic finite element method for the MTDs in the Baiyun sag. We calculated 6 sets of safety factors with 6 different dissociation levels of gas hydrate, and found that with the increasing dissociation of gas hydrate, the stability of submarine slope decreases.
学科主题	Geochemistry & Geophysics
URL标识	查看原文
语种	英语
WOS记录号	WOS:000298906400018
公开日期	2012-07-03
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/11536]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Wu, SG (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Guangzhou Marine Geol Survey, Inst Geol Survey, Guangzhou 510706, Guangdong, Peoples R China 4.CNOOC Gen Res Inst, Beijing 100027, Peoples R China 5.Hangzhou Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wu Shi-Guo,Qin Zhi-Liang,Wang Da-Wei,et al. Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(12):3184-3195.
APA	Wu Shi-Guo.,Qin Zhi-Liang.,Wang Da-Wei.,Peng Xue-Chao.,Wang Zhi-Jun.,...&Wu, SG .(2011).Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(12),3184-3195.
MLA	Wu Shi-Guo,et al."Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.12(2011):3184-3195.