Upper crustal velocity of Lijiang-Qingzhen profile and its relationship with the seismogenic environment of the M(s)6.5 Ludian earthquake

doi:10.6038/cjg20140932

	Upper crustal velocity of Lijiang-Qingzhen profile and its relationship with the seismogenic environment of the M(s)6.5 Ludian earthquake
	Xu Tao 1; Zhang Ming-Hui 1,2; Tian Xiao-Bo 1; Zheng Yong 3; Bai Zhi-Ming 1; Wu Cheng-Long 1,2; Zhang Zhong-Jie 1; Teng Ji-Wen 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2014-09-01
卷号	57 期号:9 页码:3069-3079
关键词	Ludian earthquake Active seismic source First-arrival seismic tomography Finite-difference method Upper crust velocity structure Zhaotong-Lianfeng fault Xiaojiang fault
ISSN号	0001-5733
DOI	10.6038/cjg20140932
文献子类	Article
英文摘要	On August 3, 2014, an M(s)6.5 earthquake occurred in Ludian County, Yunnan. The. Ludian earthquake ruptured along the NE-oriented Zhaotong - Lianfeng fault zone, western margin of the Yangtze block. However, there was no seismic sounding profile across the Zhaotong Lianfeng fault zone up to now. Since the distance from Lijiang - Panzhihua - Qingzhen active source seismic sounding profile to the Ludian earthquake source region is within 50 km, we can handle the wide-angle seismic data to reveal the upper crustal velocity structure in this area, and provide the velocity model of upper crust for the earthquake locating and focal mechanism inversion of Ludian earthquake sequence, etc. The velocity profile shows that the crustal velocity around the Xiaojiang fault is lower than its periphery, thus the rheological strength of the upper crust beneath the Xiaojiang fault is speculated to be weaker than its surrounding areas. Considering the high strain rate along the Xiaojiang fault, it is possible to accumulate great strain and strong stress in the Xiaojiang fault zone and its surrounding faults. Thus we should pay attention to the potential risk of strong earthquakes on the Xiaojiang fault and its nearby Ludian - Zhaotong fault.
WOS关键词	1ST-ARRIVAL TRAVEL-TIMES ; DEPENDENT EIKONAL EQUATION ; EMEISHAN FLOOD BASALTS ; LARGE IGNEOUS PROVINCE ; SOUTHWESTERN CHINA ; IRREGULAR SURFACE ; GEOLOGICAL MODELS ; TIBETAN PLATEAU ; WESTERN YUNNAN ; UPPER-MANTLE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000342479900032
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85048]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu Tao
作者单位	1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, State Key Lab Geodesy & Earths Dynam, Inst Geodesy & Geophys, Wuhan 430077, Peoples R China
推荐引用方式 GB/T 7714	Xu Tao,Zhang Ming-Hui,Tian Xiao-Bo,et al. Upper crustal velocity of Lijiang-Qingzhen profile and its relationship with the seismogenic environment of the M(s)6.5 Ludian earthquake[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(9):3069-3079.
APA	Xu Tao.,Zhang Ming-Hui.,Tian Xiao-Bo.,Zheng Yong.,Bai Zhi-Ming.,...&Teng Ji-Wen.(2014).Upper crustal velocity of Lijiang-Qingzhen profile and its relationship with the seismogenic environment of the M(s)6.5 Ludian earthquake.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(9),3069-3079.
MLA	Xu Tao,et al."Upper crustal velocity of Lijiang-Qingzhen profile and its relationship with the seismogenic environment of the M(s)6.5 Ludian earthquake".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.9(2014):3069-3079.