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Crustal shear-wave velocity structure of northeastern Tibet revealed by ambient seismic noise and receiver functions

文献类型：期刊论文

作者Wu, Zhenbo1,2; Xu, Tao1,3; Badal, Jose4; Yao, Huajian5,6; Wu, Chenglong1,2; Teng, Jiwen1
刊名GONDWANA RESEARCH
出版日期2017
卷号41页码:400-410
关键词Northeastern Tibet Ambient Noise Cross-correlation Phase Velocity Dispersion Receiver Functions Joint Inversion Crustal Low Velocity Zone
ISSN号1342-937X
DOI10.1016/j.gr.2015.08.009
文献子类Article
英文摘要The Tibetan plateau is formed by the persistent convergence between the Indian and Eurasian plates. The northeastern Tibetan plateau is undergoing young deformation that has been noticed for a long time. We conduct a passive-source seismic profile with 22 stations in NE Tibet in order to investigate the crustal shear-wave velocity structure and its relationship with tectonic processes. In this paper we obtain the Rayleigh-wave phase velocity dispersion data among all station pairs within the period bandwidth of 5-20 s from the method of ambient noise cross-correlations. Phase velocity variations correlate well with surface geological boundaries and tectonic features, for instance, low phase velocity beneath the Songpan-Ganzi block and the Guide basin. Wealso compute P-wave receiver functions based on the selected teleseismic events with similar ray parameters, and perform the joint inversion of surface wave dispersion data and receiver functions to obtain the 2-D crustal shear-wave velocity structure along the profile. The inversion results show that low shear-wave velocities beneath the Songpan-Ganzi block are widespread in the middle-to-lower crust. In together with high crustal Vp/Vs ratios and high temperature suggested by the P-wave velocities obtained from the active-source seismic study, we suggest that the low velocity zone beneath the Songpan-Ganzi block is probably attributed to partial melting. Across the North Kunlun fault, there is no crustal LVZ found beneath the Kunlun block. This structural difference may have already existed before the collision of the two blocks, or due to limit of the northward extension for the crustal LVZ across the North Kunlun fault. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词UPPER-MANTLE STRUCTURE ; U-PB AGES ; KUNLUN FAULT ; CONTINENTAL TECTONICS ; 2-STATION ANALYSIS ; ARRAY TOMOGRAPHY ; JOINT INVERSION ; NORTHERN TIBET ; EASTERN TIBET ; SE TIBET
WOS研究方向Geology
语种英语
WOS记录号WOS:000397873300026
出版者ELSEVIER SCIENCE BV
资助机构Chinese Academy of Sciences(XDB03010700) ; China Earthquake Administration(201408023) ; National Natural Science Foundation of China(41174075 ; Fundamental Research Funds for the Central Universities(WK2080000053) ; 41474068) ; Chinese Academy of Sciences(XDB03010700) ; China Earthquake Administration(201408023) ; National Natural Science Foundation of China(41174075 ; Fundamental Research Funds for the Central Universities(WK2080000053) ; 41474068) ; Chinese Academy of Sciences(XDB03010700) ; China Earthquake Administration(201408023) ; National Natural Science Foundation of China(41174075 ; Fundamental Research Funds for the Central Universities(WK2080000053) ; 41474068) ; Chinese Academy of Sciences(XDB03010700) ; China Earthquake Administration(201408023) ; National Natural Science Foundation of China(41174075 ; Fundamental Research Funds for the Central Universities(WK2080000053) ; 41474068)
源URL[http://ir.iggcas.ac.cn/handle/132A11/53017]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Xu, Tao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Zaragoza, Phys Earth Sci, Pedro Cerbuna 12, Zaragoza 50009, Spain
5.Univ Sci & Technol China, Sch Earth & Space Sci, Lab Seismol & Phys Earths Interior, Hefei 230026, Peoples R China
6.Natl Geophys Observ Mengcheng, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Zhenbo,Xu, Tao,Badal, Jose,et al. Crustal shear-wave velocity structure of northeastern Tibet revealed by ambient seismic noise and receiver functions[J]. GONDWANA RESEARCH,2017,41:400-410.
APA Wu, Zhenbo,Xu, Tao,Badal, Jose,Yao, Huajian,Wu, Chenglong,&Teng, Jiwen.(2017).Crustal shear-wave velocity structure of northeastern Tibet revealed by ambient seismic noise and receiver functions.GONDWANA RESEARCH,41,400-410.
MLA Wu, Zhenbo,et al."Crustal shear-wave velocity structure of northeastern Tibet revealed by ambient seismic noise and receiver functions".GONDWANA RESEARCH 41(2017):400-410.

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来源：地质与地球物理研究所

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