Analysis of seismic activity in the crust from earthquake relocation in the Central Tian Shan

	Analysis of seismic activity in the crust from earthquake relocation in the Central Tian Shan
	Xu, Y ; Roecker, SW ; Wei, RP ; Zhang, WL ; Wei, B
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2005-11-01
卷号	48 期号:6 页码:1308-1315
关键词	Tian Shan Earthquake Location Crustal Structure Source Parameter
ISSN号	0001-5733
文献子类	Article
英文摘要	Using P and S wave arrivals from local and regional earthquakes recorded by a temporary broadband seismic network, we relocated the earthquakes occurring in the central Tian Shan and adjacent areas during 1997 similar to 1998, based on one-dimensional and three-dimensional velocity models. Seismic activity in the crust was analyzed according to the source parameters of these relocated earthquakes. Earthquake distribution indicates that most range-bounding faults within the orogenic belt are active and they have played a significant role in the tectonic activity of the crust of the Tian Shan. However, the seismic activity along the Talas-Fergana fault reveals a different feature: the activity of its southeast segment and some faults in the southwestern Tian Shan is weak at present, while its northwestern segment, probably activated by adjacent faults, is more active. Tectonic activity seems to penetrate from the margin of the Tian Shan into foreland basins on the north and south. The earthquakes at 30 similar to 40km depths indicate that brittle ruptures exist in the mid-lower crust of the central Tian Shan and they are probably induced by thermal perturbation near the crust-mantle boundary. This means that dynamic processes roles like small-scale mantle convection and asthenosphere upwelling are still ongoing in the central Tian Shan.
WOS关键词	CENTRAL TIEN-SHAN ; CENTRAL-ASIA ; SOURCE PARAMETERS ; VELOCITY STRUCTURE ; 1992 SUUSAMYR ; JIASHI ; FAULT ; KYRGYZSTAN ; DEFORMATION ; INVERSION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000233659900013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65028]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu, Y
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Rensselaer Polytech Inst, Troy, NY 12180 USA 3.Seismol Bur Xinjiang Uyger Autonomous Reg, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Xu, Y,Roecker, SW,Wei, RP,et al. Analysis of seismic activity in the crust from earthquake relocation in the Central Tian Shan[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2005,48(6):1308-1315.
APA	Xu, Y,Roecker, SW,Wei, RP,Zhang, WL,&Wei, B.(2005).Analysis of seismic activity in the crust from earthquake relocation in the Central Tian Shan.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,48(6),1308-1315.
MLA	Xu, Y,et al."Analysis of seismic activity in the crust from earthquake relocation in the Central Tian Shan".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 48.6(2005):1308-1315.