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DOI	10.1007/s11589-012-0872-0
	Pn wave velocity and anisotropy beneath Pamir and its adjacent regions
	Feng, Biao; Pei, Shunping
通讯作者	Pei, SP (通讯作者)
发表日期	2012
ISSN	1674-4519
EISSN	1867-8777
起始页码	485
结束页码	493
卷号	25 期号:5-6
英文摘要	As the western end point of continental collision between the Indian and Eurasian plates, Pamir is an ideal place to research uplifting mechanisms in the Tibetan plateau. In this study, 141 644 Pn arrivals were used to obtain seismic wave velocities and anisotropy in the uppermost mantle beneath Pamir and its adjacent regions by performing tomographic inversion of Pn travel times. The data were selected from multiple databases, including ISC/EHB, the Annual Bulletin of Chinese Earthquakes, and regional bulletins of Xinjiang. The tomography results reveal significant features with high resolution and correlate well with geological structures. The main results are as follows: (1) The Pn wave velocities are particularly high in the old stable blocks such as Tarim basin, Indian plate and Tajik basin, while the low Pn velocities always lie in tectonically active regions like the western Tibetan plateau, Pamir, Tianshan and Hindu Kush. (2) Strong Pn anisotropy is found beneath the Indian-Eurasian collision zone; its direction is parallel to the collision arc and nearly perpendicular to both the direction of maximum compression stress and relative crustal movement. The result is probably caused by the pure shear deformation in the uppermost mantle of the collision zone. (3) A geodynamic continent-continent collision model is proposed to show anisotropy and collision mechanisms between the Indian plate and the Tarim and Tajik basins.
英文关键词	Pn wave velocity; tomography; anisotropy; Pamir
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000210058700012
来源期刊	EARTHQUAKE SCIENCE
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/257994
推荐引用方式 GB/T 7714	Feng, Biao,Pei, Shunping. Pn wave velocity and anisotropy beneath Pamir and its adjacent regions[J]. 中国科学院青藏高原研究所,2012,25(5-6).
APA	Feng, Biao,&Pei, Shunping.(2012).Pn wave velocity and anisotropy beneath Pamir and its adjacent regions.EARTHQUAKE SCIENCE,25(5-6).
MLA	Feng, Biao,et al."Pn wave velocity and anisotropy beneath Pamir and its adjacent regions".EARTHQUAKE SCIENCE 25.5-6(2012).