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

文献类型：期刊论文

作者Jiang, Mingming1,2; Zhou, Shiyong1; Sandvol, Eric3; Chen, Xiaofei4; Liang, Xiaofeng1,3; Chen, Y. John1; Fan, Wenyuan1
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期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
DOI10.1111/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
WOS记录号WOS:000289475400002
出版者WILEY-BLACKWELL
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)
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.

入库方式： OAI收割

来源：地质与地球物理研究所

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