气候变化领域集成服务门户(CCPortal): Imaging lithospheric structure of the eastern Himalayan syntaxis: New insights from receiver function analysis

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DOI	10.1002/jgrb.50162
	Imaging lithospheric structure of the eastern Himalayan syntaxis: New insights from receiver function analysis
	Xu, Qiang; Zhao, Junmeng; Pei, Shunping; Liu, Hongbing
通讯作者	Xu, Q (通讯作者)
发表日期	2013
ISSN	2169-9313
EISSN	2169-9356
起始页码	2323
结束页码	2332
卷号	118 期号:5
英文摘要	We employ the P and S receiver function technique to data from the 44 seismic stations deployed in the eastern Himalayan syntaxis to investigate the crustal thickness, the average Poisson's ratio, and the depth of the lithosphere-asthenosphere boundary (LAB). The observed crustal thickness exhibits an overall NE-deepening trend, varying from 55 to 75 km. Two anomalous areas lie in the west and east of the Namche Barwa syntaxis characterized by thinner and thicker crust, respectively. The average Poisson's ratios within the study area are low in the north and moderate elsewhere with some high values in the south, consistent with felsic and intermediate rocks forming the crust. Our migrated images reveal that (1) the LAB of the Tibetan plate exists at relatively shallow depths (similar to 110 km) and exhibits a gap beneath the Namche Barwa syntaxis, which may have formed by the delamination of mantle lithosphere due to local mantle upwelling, and (2) the LAB of the Asian plate is observed at a depth of similar to 180 km, which implies that the Asian plate has advanced southward to about 30 degrees N under the Lhasa terrane. Our results provide new insights into the understanding of continental subduction and lithospheric deformation of the eastern Himalayan syntaxis.
关键词	SOUTHEASTERN TIBETAN PLATEAU SOUTHERN TIBET TECTONIC EVOLUTION CRUST BENEATH DEFORMATION NAMJAGBARWA TOMOGRAPHY BOUNDARY ARRAY
英文关键词	receiver functions; LAB; Namche Barwa syntaxis
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000327299800023
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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/258126
推荐引用方式 GB/T 7714	Xu, Qiang,Zhao, Junmeng,Pei, Shunping,et al. Imaging lithospheric structure of the eastern Himalayan syntaxis: New insights from receiver function analysis[J]. 中国科学院青藏高原研究所,2013,118(5).
APA	Xu, Qiang,Zhao, Junmeng,Pei, Shunping,&Liu, Hongbing.(2013).Imaging lithospheric structure of the eastern Himalayan syntaxis: New insights from receiver function analysis.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,118(5).
MLA	Xu, Qiang,et al."Imaging lithospheric structure of the eastern Himalayan syntaxis: New insights from receiver function analysis".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 118.5(2013).