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A new method to constrain shallow crustal S-wave velocities based on direct P-wave amplitudes in receiver functions and its application in northeastern Tibet
Wang, Xu1,3; Chen, Ling1,2,3; Ling, Yuan1,3; Gao, Yifan1,3; Zhang, Jianyong1,3; Yao, Huajian4,5,6
2019-11-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume62Issue:11Pages:1819-1831
AbstractA new method is developed to constrain S-wave velocity structures of the shallow crust based on frequency-dependent amplitudes of direct P-waves in P-wave receiver functions (P-RFs). This method involves the following two steps: first, the high-frequency approximate amplitude formula of direct P-waves in P-RFs of individual stations is used to fit the observed amplitude distribution against the ray parameters at different frequencies, and second, the S-wave velocity depth profile beneath each station is constrained according to an empirical correlation between frequency and depth. Unlike traditional inversion techniques, the newly developed method is not dependent on initial velocity models, and the lateral and vertical resolutions of the results are controlled by the interstation distance and the data frequency, respectively. The effectiveness of the method is verified by synthetic tests on various models. The method is then applied to teleseismic P-RF data from a NW-SE-trending linear seismic array extending from the northeastern Tibetan Plateau to the central Sichuan Basin to construct an S-wave velocity image of the shallow crust along the array. The imaged velocity structure is further analysed and compared with the regional geology. In particular, the structural differences of sedimentary basins in the cratonic area of the stable Sichuan Basin and tectonically active belts in northeastern Tibet are investigated. By combining our results with previous observations, the relationship between the surficial geology and deep processes in the study region is also discussed.
KeywordReceiver function Direct P-wave amplitude S-wave velocity structure Shallow crust Northeastern Tibet Sichuan Basin
DOI10.1007/s11430-018-9443-6
WOS KeywordNEIGHBORHOOD ALGORITHM ; GEOPHYSICAL INVERSION ; BENEATH EASTERN ; LONGMEN SHAN ; PLATEAU ; CHINA ; DEFORMATION ; EVOLUTION ; MIGRATION ; MARGIN
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000495242100011
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95745
Collection岩石圈演化国家重点实验室
Corresponding AuthorChen, Ling
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Sci & Technol China, Lab Seismol & Phys Earths Interior, Anhua 230026, Peoples R China
5.Univ Sci & Technol China, Sch Earth & Space Sci, Anhua 230026, Peoples R China
6.Univ Sci & Technol China, Mengcheng Natl Geophys Observ, Mengcheng 233500, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Wang, Xu,Chen, Ling,Ling, Yuan,et al. A new method to constrain shallow crustal S-wave velocities based on direct P-wave amplitudes in receiver functions and its application in northeastern Tibet[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(11):1819-1831.
APA Wang, Xu,Chen, Ling,Ling, Yuan,Gao, Yifan,Zhang, Jianyong,&Yao, Huajian.(2019).A new method to constrain shallow crustal S-wave velocities based on direct P-wave amplitudes in receiver functions and its application in northeastern Tibet.SCIENCE CHINA-EARTH SCIENCES,62(11),1819-1831.
MLA Wang, Xu,et al."A new method to constrain shallow crustal S-wave velocities based on direct P-wave amplitudes in receiver functions and its application in northeastern Tibet".SCIENCE CHINA-EARTH SCIENCES 62.11(2019):1819-1831.
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