P wave velocity structure of upper and middle crust beneath the Three Gorges reservoir dam and adjacent regions

doi:10.1007/s11430-009-0047-6

	P wave velocity structure of upper and middle crust beneath the Three Gorges reservoir dam and adjacent regions
	Li Qiang 1; Zhao Xu 2; Cai JinAn 3; Liu RuiFeng 2; Long GuiHua 4; An YanRu 2
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2009-04-01
卷号	52 期号:4 页码:567-578
关键词	Three Gorges reservoir upper and middle crust three-dimensional velocity structure
ISSN号	1006-9313
DOI	10.1007/s11430-009-0047-6
文献子类	Article
英文摘要	The three-dimensional P wave velocity structures of upper and middle crust beneath the Three Gorges reservoir dam and adjacent regions were reconstructed by means of the seismic tomography, using the absolute P-arrivals from the events observed by the Three Gorges seismic network. Our preliminary study of the deep structure shows: (1) the lithology of the Huangling anticline, integral and highly solidified, exhibits a uniformity. Down to a depth of 20 km, the Huangling anticline still shows high-velocity anomalies. Note that the characteristics of the velocity images with the different depths are not the same; (2) the depth of the sedimentary rocks beneath the entire Zigui basin is not constant, which is less than 6 km; (3) the top boundary of the crystalline basement varies from 0 to 7 km, whereas the bottom one between 14 and 16 km; (4) the partially molten substances of the upper mantle are located in the Badong-Zigui and its adjacent regions as well as nearby Peishi area. The development and evolution of the current tectonics are associated with the cooling and solidifying process of the molten substances within the upper mantle; (5) the different velocity structures of the deep crust in both east and west side of the Jiuwanxi fault are to be investigated in order to understand the origin of gravitational gradient zone in the Three Gorge areas; and (6) the velocities within the upper crust would be affected by reservoir water permeability.
WOS关键词	EARTHQUAKE LOCATION ALGORITHM
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000265046100015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71808]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao Xu
作者单位	1.China Earthquake Adm, Natl Earthquake Infrastruct Serv, Beijing 100037, Peoples R China 2.China Earthquake Adm, China Earthquake Network Ctr, Beijing 100045, Peoples R China 3.China Earthquake Adm, Inst Earthquake Sci, Beijing 100036, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li Qiang,Zhao Xu,Cai JinAn,et al. P wave velocity structure of upper and middle crust beneath the Three Gorges reservoir dam and adjacent regions[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(4):567-578.
APA	Li Qiang,Zhao Xu,Cai JinAn,Liu RuiFeng,Long GuiHua,&An YanRu.(2009).P wave velocity structure of upper and middle crust beneath the Three Gorges reservoir dam and adjacent regions.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(4),567-578.
MLA	Li Qiang,et al."P wave velocity structure of upper and middle crust beneath the Three Gorges reservoir dam and adjacent regions".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.4(2009):567-578.