The crustal anisotropy and its geodynamical significance of the strong basin-range interaction zone beneath the east margin of Qinghai-Tibet plateau

doi:10.3969/j.issn.0001-5733.2011.05.009

	The crustal anisotropy and its geodynamical significance of the strong basin-range interaction zone beneath the east margin of Qinghai-Tibet plateau
	Sun Chang-Qing 1,2; Chen Yun 1; Gao Er-Gen 3
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-05-01
卷号	54 期号:5 页码:1205-1214
关键词	Qinghai-tibet Plateau Basin-range Interaction Receiver Function Shear Wave Splitting Crustal Anisotropy
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.05.009
文献子类	Article
英文摘要	Based on the data of a dense linear array of a passive seismic experiment crossing the Longmenshan Fault in the east margin of Qinghai-Tibet Plateau, we measured the splitting parameters of Moho-converted Ps phases (Pms) for 147 teleseismic events recorded by 28 stations, and then analyzed the crustal anisotropy of this strong basin-range interaction zone. The results demonstrate that the crustal anisotropy of study area has significantly different characteristics in different subregions. On the whole, the splitting time averaged over the Songpan-Ganzi Block is greater than that in Sichuan Basin (similar to 0. 28 s vs. similar to 0. 16 s). The fast polarization direction (FPD) in Aba Sub-block is nearly consistent with that in Sichuan Basin, but there is a trend of clockwise rotation from the Aba Sub-block in the northwest to the Longmenshan Fault in the southeast. It changes from NNW (-24 degrees) to NNE (13 degrees) till nearly parallel to the strike of Longmenshan Fault. The azimuthal variation of FPD in different blocks indicates that the crustal deformation is accommodated or controlled by the major boundary faults between the blocks.
WOS关键词	2008 WENCHUAN EARTHQUAKE ; SHEAR-WAVE ANISOTROPY ; DEFORMATION ; COLLISION ; CHINA ; ASIA ; DENUDATION ; TECTONICS ; EVOLUTION ; SEQUENCE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000291189200009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73706]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun Chang-Qing
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Inst Disaster Prevent Sci & Technol, Dept Seismol Sci, Yanjiao Town 065201, Hebei Province, Peoples R China
推荐引用方式 GB/T 7714	Sun Chang-Qing,Chen Yun,Gao Er-Gen. The crustal anisotropy and its geodynamical significance of the strong basin-range interaction zone beneath the east margin of Qinghai-Tibet plateau[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(5):1205-1214.
APA	Sun Chang-Qing,Chen Yun,&Gao Er-Gen.(2011).The crustal anisotropy and its geodynamical significance of the strong basin-range interaction zone beneath the east margin of Qinghai-Tibet plateau.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(5),1205-1214.
MLA	Sun Chang-Qing,et al."The crustal anisotropy and its geodynamical significance of the strong basin-range interaction zone beneath the east margin of Qinghai-Tibet plateau".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.5(2011):1205-1214.