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Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults
Nie, Shitan1,2; Tian, Xiaobo1,3; Liang, Xiaofeng1,4; Chen, Yun1,4; Xu, Tao1,3
2020-08-05
Source PublicationTECTONOPHYSICS
ISSN0040-1951
Volume788Pages:10
AbstractThe north-south convergence between the Indian and Eurasian continents since Cenozoic has produced the Tibetan plateau, and east-west extension structures have also developed since late Cenozoic. Whether these extensional structures are limited to the crust or extend to the deep lithosphere remains controversial. The uppermost mantle serves as a link between the crust and deep lithosphere, the velocity structure of which provides an important constraint on exploring the mechanism of extensional structures. Based on Pn traveltime data recorded by the SANDWICH network in central Tibet, we use the interstation traveltime difference method to obtain the uppermost mantle velocity structure. Our results show significant velocity differences for the uppermost mantle beneath the conjugated strike-slip faults and rifts, which indicates their different formation mechanisms. The high Pn velocity beneath the conjugated strike-slip faults support an eastward horizontal shear at the base of the upper crust rather than the lower crust has contributed to the development of the conjugated strike-slip faults. The low Pn velocity beneath the rifts in Lhasa may provide evidence for the rifts cutting through the entire crust and reflect the connection between the formation of the rifts and deep tectonic activities. The most prominent features in our results are the low Pn velocity zones beneath the Tangra Yum Co Rift (TYR), the Pumqu-Xianza Rift (PXR) and the zone between the two rifts, and we explain the low Pn velocity as the top of the mantle wedge upon the subducting Indian lithospheric slab.
KeywordTibetan Plateau Pn velocity Indian lithospheric slab North-south trending rifts Conjugated strike-slip faults
DOI10.1016/j.tecto.2020.228499
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordVELOCITY STRUCTURE BENEATH ; INDIAN LITHOSPHERE BENEATH ; EAST-WEST EXTENSION ; YADONG-GULU RIFT ; SOUTHERN TIBET ; ANISOTROPIC TOMOGRAPHY ; EARTHQUAKES BENEATH ; QIANGTANG TERRANE ; CRUSTAL STRUCTURE ; SEISMIC ARRAY
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0600301] ; strategic Priority Research Program (B) of the Chinese Academy of Science[XDB03010700] ; National Natural Science Foundation of China[41974053] ; National Natural Science Foundation of China[41574048]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000540731100002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96897
Collection岩石圈演化国家重点实验室
Corresponding AuthorTian, Xiaobo
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Nie, Shitan,Tian, Xiaobo,Liang, Xiaofeng,et al. Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults[J]. TECTONOPHYSICS,2020,788:10.
APA Nie, Shitan,Tian, Xiaobo,Liang, Xiaofeng,Chen, Yun,&Xu, Tao.(2020).Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults.TECTONOPHYSICS,788,10.
MLA Nie, Shitan,et al."Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults".TECTONOPHYSICS 788(2020):10.
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