Tomographic images of crustal structure beneath the Bohai Strait and surrounding areas, eastern China

doi:10.6038/cjg20170110

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	Tomographic images of crustal structure beneath the Bohai Strait and surrounding areas, eastern China
	Wang Sheng 1,2; Xu Yi 1; Meng Xiao-Chun 3
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017
卷号	60 期号:1 页码:112-122
关键词	Bohai Strait Seismic Tomography Crust And Upper Mantle Velocity Structure Fault Zone
ISSN号	0001-5733
DOI	10.6038/cjg20170110
文献子类	Article
英文摘要	The Bohai Strait is an important channel to link the Liaodong peninsula and the Shandong peninsula of eastern China. To estimate the stability of the crustal structure of the strait and adjacent areas, we used seismic tomography to construct a three-dimensional P-wave velocity model for this region. Distinct velocity variations are observed beneath the Bohai Strait. Its northern part is featured by a high-velocity curst with stable structure, less affected by tectonic alternations, with weak seismicity. However, a thin low-velocity layer is found in the lowermost crust, which extends from the northern strait toward the Liaodong peninsula, and may be a detachment layer between the crust and the upper mantle. We need to confirm this layer through future studies. On the contrary, the southern part of the strait is featured by a low velocity crust with active seismicity likely associated with the Zhangjiakou-Penglai fault zone. Tectonic activity along this fault zone greatly affects the stability of the crustal structure of the southern strait. In the southern Bohai Sea, prominent velocity variations are observed in the east and west of the Tan-Lu fault zone. Compared to the high-velocity crust in the west, the east of the fault zone adjacent to the Bohai Strait is featured by the low-velocity crust. This is probably related to a broadly distributed fault system and frequent earthquakes of the area. Additionally, affected by the North China Craton destruction and mantle upwelling, low velocity characterizes the deep crust and upper mantle of the Bohai Sea. Evidence of heat flows can be found in the uppermost mantle beneath the Tan-Lu fault zone and the Bohai Strait, which reflects the thinning of the lithosphere and the local rise of the asthenosphere.
WOS关键词	LU FAULT ZONE ; NORTH CHINA ; VELOCITY STRUCTURE ; SEISMIC TOMOGRAPHY ; WAVE VELOCITY ; UPPER-MANTLE ; YELLOW SEA ; CRATON ; DESTRUCTION ; OFFSHORE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000392040800010
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53141]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Xu Yi
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Sci & Technol Inst Disaster Prevent, Sanhe 101601, Heibei, Peoples R China
推荐引用方式 GB/T 7714	Wang Sheng,Xu Yi,Meng Xiao-Chun. Tomographic images of crustal structure beneath the Bohai Strait and surrounding areas, eastern China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(1):112-122.
APA	Wang Sheng,Xu Yi,&Meng Xiao-Chun.(2017).Tomographic images of crustal structure beneath the Bohai Strait and surrounding areas, eastern China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(1),112-122.
MLA	Wang Sheng,et al."Tomographic images of crustal structure beneath the Bohai Strait and surrounding areas, eastern China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.1(2017):112-122.