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  4. 中国科学院地球与行星物理重点实验室
Limited southward underthrusting of the Asian lithosphere and material extrusion beneath the northeastern margin of Tibet, inferred from teleseismic Rayleigh wave tomography

文献类型：期刊论文

作者Wei, Xiaozhuo1,2; Jiang, Mingming1,3; Liang, Xiaofeng4; Chen, Ling2,3,4; Ai, Yinshuang1,2,3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2017-09-01
卷号122期号:9页码:7172-7189
ISSN号2169-9313
关键词Northeastern Tibet North China Craton Rayleigh wave tomography material escaping flow lithosphere subduction
DOI10.1002/2016JB013832
文献子类Article
英文摘要The northeastern margin of Tibet is of key importance in understanding the uplift and expansion of Tibetan Plateau. In this research, we perform Rayleigh wave tomography from 20 s to 167 s using the data recorded by China Digital Seismic Network and several portable seismic arrays in Northeastern Tibet and adjacent areas. Our resultant 3-D shear wave velocity model exhibits strong lateral variations in the lithosphere. High shear wave velocities are observed in the mantle of the cratonic Ordos and Yangtze Blocks, as well as the East Qinling Orogen. The Qilian Orogen is underlain by a similar to 120 km thick lithosphere of intermediate velocities and a low-velocity layer of asthenospheric mantle below the depth of 120 km. Low velocities are characteristic in the middle-to-lower crust of the Songpan-Ganzi Terrane and the West Qinling Orogen, possibly representing the crustal flow penetrating the Kunlun Fault. An uppermost mantle low-velocity zone is found in the same location, indicating either the asthenosphere upwelling or the transitional crust-mantle boundary layer. Our observations have two tectonic implications. First, the large-scale eastward Tibetan material extrusion into Eastern China through the East Qinling Orogen is unlikely to be an ongoing process above 200 km depth; second, the southward subduction of the North China Craton toward Northeastern Tibet may not have fully developed in this region. Furthermore, we propose that the difference in the lithospheric strength between the Qaidam Block and the West Qinling Orogen is a critical element to control the tectonics in the northeastern margin of Tibet.
WOS关键词NORTH CHINA CRATON ; UPPER-MANTLE STRUCTURE ; AMBIENT NOISE TOMOGRAPHY ; INDIA-EURASIA COLLISION ; LOW-VELOCITY ZONE ; TECTONIC IMPLICATIONS ; RECEIVER FUNCTIONS ; CRUSTAL STRUCTURE ; EASTERN CHINA ; AZIMUTHAL ANISOTROPY
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000412881700012
资助机构Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; 41225016 ; 41225016 ; 41225016 ; 41225016 ; 41574056) ; 41574056) ; 41574056) ; 41574056) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; 41225016 ; 41225016 ; 41225016 ; 41225016 ; 41574056) ; 41574056) ; 41574056) ; 41574056) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; 41225016 ; 41225016 ; 41225016 ; 41225016 ; 41574056) ; 41574056) ; 41574056) ; 41574056) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; Chinese Academy of Sciences(XDB18000000) ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; National Natural Science Foundation of China(41274002 ; 41225016 ; 41225016 ; 41225016 ; 41225016 ; 41574056) ; 41574056) ; 41574056) ; 41574056)
源URL[http://ir.iggcas.ac.cn/handle/132A11/61984]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Jiang, Mingming
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Xiaozhuo,Jiang, Mingming,Liang, Xiaofeng,et al. Limited southward underthrusting of the Asian lithosphere and material extrusion beneath the northeastern margin of Tibet, inferred from teleseismic Rayleigh wave tomography[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2017,122(9):7172-7189.
APA Wei, Xiaozhuo,Jiang, Mingming,Liang, Xiaofeng,Chen, Ling,&Ai, Yinshuang.(2017).Limited southward underthrusting of the Asian lithosphere and material extrusion beneath the northeastern margin of Tibet, inferred from teleseismic Rayleigh wave tomography.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,122(9),7172-7189.
MLA Wei, Xiaozhuo,et al."Limited southward underthrusting of the Asian lithosphere and material extrusion beneath the northeastern margin of Tibet, inferred from teleseismic Rayleigh wave tomography".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122.9(2017):7172-7189.

入库方式： OAI收割

来源：地质与地球物理研究所

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