气候变化领域集成服务门户(CCPortal): S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography

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DOI	10.1007/s11434-010-4017-3
	S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography
	Guo Zhi; Gao Xing; Wang WeiMin; Li GuiLin; Duan ZongQi; Shi Heng
通讯作者	Guo, Z (通讯作者)
发表日期	2010
ISSN	1001-6538
起始页码	3590
结束页码	3598
卷号	55 期号:31
英文摘要	We process ambient noise data from seismic stations deployed in central Asia to determine the crustal shear wave velocity structure beneath the Tianshan Mountians and surrounding area. About 748 inter-station Rayleigh wave empirical Green's functions have been recovered to estimate the phase velocity dispersions over periods from 6 to 50 s using the image transformation technique. Results show that for short periods (6-20 s), the distribution of Rayleigh wave phase velocities is generally consistent with surface geology, with high velocities corresponding to mountain ranges and low velocities to sedimentary basins. Along two profiles, which trend from NE-SW and NW-SE, the shear wave velocity shows a pair of high velocity anomalies dipping in opposite directions beneath the Tianshan Mountains. At shallow depths, those high velocity anomalies roughly correlate with areas where the mountain front and the surrounding basin are connected. The profiles also show a narrow zone beneath the Tianshan Mountains, which may represent a route for the upwelling from upper mantle. Those observations suggest that the underthrusting of the Tarim Basin and Kazakh Shield combine with the weakness of the crust, which is heated by the upwelling from upper mantle, may play an important role on the reactivation of the Tianshan Mountains associated with the India-Eurasia collision.
关键词	CENTRAL TIEN-SHAN NEIGHBORING REGIONS CENOZOIC TECTONICS MANTLE STRUCTURE CENTRAL-ASIA TARIM BASIN BENEATH WESTERN KYRGYZSTAN CHINA
英文关键词	ambient noise tomography; Tianshan Mountains; crustal structure; upper mantle upwelling
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000284111500014
来源期刊	CHINESE SCIENCE BULLETIN
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257756
推荐引用方式 GB/T 7714	Guo Zhi,Gao Xing,Wang WeiMin,et al. S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography[J]. 中国科学院青藏高原研究所,2010,55(31).
APA	Guo Zhi,Gao Xing,Wang WeiMin,Li GuiLin,Duan ZongQi,&Shi Heng.(2010).S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography.CHINESE SCIENCE BULLETIN,55(31).
MLA	Guo Zhi,et al."S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography".CHINESE SCIENCE BULLETIN 55.31(2010).