气候变化领域集成服务门户(CCPortal): Convergence of the Indian and Eurasian plates under eastern Tibet revealed by seismic tomography

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DOI	10.1029/2012GC004031
	Convergence of the Indian and Eurasian plates under eastern Tibet revealed by seismic tomography
	Zhang, Heng; Zhao, Dapeng; Zhao, Junmeng; Xu, Qiang
通讯作者	Zhang, H (通讯作者)
发表日期	2012
EISSN	1525-2027
卷号	13
英文摘要	A three-dimensional P wave velocity model of the crust and upper mantle down to 400-km depth beneath eastern Tibet is obtained using many temporary seismic stations of the ASCENT project and the Namche Barwa Broadband Seismic Network. We collected 16,508 arrival times of P, Pn and Pg phases from 573 local and regional earthquakes and 7,450 P wave arrivals from seismograms of 435 teleseismic events. Our high-quality data set enables us to reconstruct the 3-D velocity structure under eastern Tibet in more detail than the previous studies. In the shallow depth, our results show that the low velocity zones are not interconnected well (no wide-spread low velocity zones), which may reflect the complex pattern of material flowing in the study region. Below the Moho, we find that the Indian lithospheric mantle underthrusts sub-horizontally under eastern Tibet, and the extent of the northward advancing Indian lithosphere decreases from west to east. In the north, the Asian lithospheric mantle is detected under the vicinity of the Qaidam Basin. Between the Indian and Asian lithospheric mantles, there is an obvious low-velocity anomaly which may reflect an upwelling mantle diapir.
关键词	LITHOSPHERE BENEATH CRUSTAL DEFORMATION NORTHERN TIBET SOUTHERN TIBET P-WAVE SUBDUCTION FLOW ASIA TECTONICS ZONE
英文关键词	mantle diapir; plate subduction; the Eurasian plate; the Indian plate; tomography
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000305144300002
来源期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
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/257995
推荐引用方式 GB/T 7714	Zhang, Heng,Zhao, Dapeng,Zhao, Junmeng,et al. Convergence of the Indian and Eurasian plates under eastern Tibet revealed by seismic tomography[J]. 中国科学院青藏高原研究所,2012,13.
APA	Zhang, Heng,Zhao, Dapeng,Zhao, Junmeng,&Xu, Qiang.(2012).Convergence of the Indian and Eurasian plates under eastern Tibet revealed by seismic tomography.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,13.
MLA	Zhang, Heng,et al."Convergence of the Indian and Eurasian plates under eastern Tibet revealed by seismic tomography".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 13(2012).