3-D lithospheric structure beneath southern Tibet from Rayleigh-wave tomography with a 2-D seismic array

doi:10.1111/j.1365-246X.2011.04979.x

	3-D lithospheric structure beneath southern Tibet from Rayleigh-wave tomography with a 2-D seismic array
	Jiang, Mingming 1,2; Zhou, Shiyong 1; Sandvol, Eric 3; Chen, Xiaofei 4; Liang, Xiaofeng 1,3; Chen, Y. John 1; Fan, Wenyuan 1
刊名	GEOPHYSICAL JOURNAL INTERNATIONAL
	2011-05-01
卷号	185 期号:2 页码:593-608
关键词	Surface waves and free oscillations Seismic tomography Continental margins: convergent Dynamics: seismotectonics Crustal structure
ISSN号	0956-540X
DOI	10.1111/j.1365-246X.2011.04979.x
文献子类	Article
英文摘要	P>A 3-D shear wave velocity model has been established for the lithosphere of southern Tibet through Rayleigh-wave tomography. The teleseismic data are acquired from a 2-D seismic array selected out of the second phase of the Hi-CLIMB project. We first inverted for a 2-D phase velocity model using two-plane-wave tomography approach, and then inverted for the 3-D shear wave velocity model with the 2-D phase velocity model and the map of crustal thickness derived from receiver functions. The results reveal a pervasive low velocity anomaly in the middle crust of the Lhasa block. We interpret this low velocity anomaly as the presence of wholesale mid-crustal channel flow. Prominent low velocity anomalies from the lower crust to the mantle lithosphere are observed along the north-south trending rifts: the Tangra Yum Co rift and the Pumqu Xianza rift. We propose a possible scenario for the formation of these rifts: the entire lithosphere is involved in the early-stage rifting, while the late-stage rifting is restricted in the upper crust. In the non-rift regions, a slab-like high velocity anomaly is traced beneath both the Himalayas and Lhasa block. Combining all the observations, we suggest that the central part of southern Tibet is currently underlain by the broken Indian lower crust and mantle lithosphere.
WOS关键词	EAST-WEST EXTENSION ; CRUSTAL STRUCTURE ; VELOCITY STRUCTURE ; COLLISION ZONE ; NORTHERN TIBET ; UPPER-MANTLE ; CONTINENTAL COLLISION ; NEIGHBORING REGIONS ; EARTHQUAKES BENEATH ; 2-STATION ANALYSIS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000289475400002
资助机构	Natural science fundation of China(40774017 ; Natural science fundation of China(40774017 ; 40904022) ; 40904022) ; Natural science fundation of China(40774017 ; Natural science fundation of China(40774017 ; 40904022) ; 40904022) ; Natural science fundation of China(40774017 ; Natural science fundation of China(40774017 ; 40904022) ; 40904022) ; Natural science fundation of China(40774017 ; Natural science fundation of China(40774017 ; 40904022) ; 40904022)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74038]
专题	中国科学院地质与地球物理研究所
通讯作者	Jiang, Mingming
作者单位	1.Peking Univ, Inst Theoret & Appl Geophys, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China 3.Univ Missouri, Dept Geol Sci, Columbia, MO 65211 USA 4.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Mingming,Zhou, Shiyong,Sandvol, Eric,et al. 3-D lithospheric structure beneath southern Tibet from Rayleigh-wave tomography with a 2-D seismic array[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2011,185(2):593-608.
APA	Jiang, Mingming.,Zhou, Shiyong.,Sandvol, Eric.,Chen, Xiaofei.,Liang, Xiaofeng.,...&Fan, Wenyuan.(2011).3-D lithospheric structure beneath southern Tibet from Rayleigh-wave tomography with a 2-D seismic array.GEOPHYSICAL JOURNAL INTERNATIONAL,185(2),593-608.
MLA	Jiang, Mingming,et al."3-D lithospheric structure beneath southern Tibet from Rayleigh-wave tomography with a 2-D seismic array".GEOPHYSICAL JOURNAL INTERNATIONAL 185.2(2011):593-608.