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Contrasting crustal deformation mechanisms in the Longmenshan and West Qinling orogenic belts, NE Tibet, revealed by magnetotelluric data
Xue, Shuai; Bai, Denghai1; Chen, Yun; Ma, Xiaobing; Chen, Lin; Li, Xin; Yan, Yongli
2019-06-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume176Pages:120-128
AbstractThe northeastern margin of Tibet is the youngest risen part and key area for understanding the growth mechanism of the Tibetan Plateau. New broadband magnetotelluric (MT) data are conducted at the conjunction of the Longmenshan and West Qinling orogenic belts in NE Tibet. The preferred resistivity model obtained using 3-D inversion method shows a dramatic resistivity contrast from the Sichuan Basin (SB) to the West Qinling Orogenic Belt (WQOB). Beneath the SB and Longmenshan Orogenic Belt (LMSOB), several low-resistivity zones are distributed in the upper crust underlain by an intact resistive lower crust, indicating the upper crustal deformation is responsible for the uplift of the LMSOB. While to the north, a prominently conductive lower crust is observed, favoring the ductile deformation of the weak lower crust plays a significant role in the crustal thickening of the WQOB. Therefore, we suggest contrasting crustal deformation mechanisms work in the LMSOB and WQOB, and diversified crustal deformations together contribute to the marginal growth of the plateau. Moreover, combining with other studies, we propose the deep conductive bodies beneath the WQOB would be induced by the hot upwelling related to the asthenospheric flow from the plateau.
KeywordMagnetotellurics Electrical resistivity structure Crustal deformation Longmenshan orogenic belt West Qinling orogenic belt
DOI10.1016/j.jseaes.2019.01.039
Funding OrganizationNational Natural Science Foundation of China ; 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 Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordNORTHEASTERN MARGIN ; STRUCTURE BENEATH ; NORTHERN MARGIN ; EASTERN MARGIN ; TECTONIC EVOLUTION ; EASTWARD EXPANSION ; PLATEAU EVIDENCE ; JOINT INVERSION ; ORDOS BLOCK ; STRIKE-SLIP
Language英语
Funding ProjectNational Natural Science Foundation of China[41330212] ; National Natural Science Foundation of China[41474056] ; National Natural Science Foundation of China[41804090]
Funding OrganizationNational Natural Science Foundation of China ; 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 Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000466823600010
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/91475
Collection岩石圈演化国家重点实验室
Corresponding AuthorBai, Denghai
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Xue, Shuai,Bai, Denghai,Chen, Yun,et al. Contrasting crustal deformation mechanisms in the Longmenshan and West Qinling orogenic belts, NE Tibet, revealed by magnetotelluric data[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,176:120-128.
APA Xue, Shuai.,Bai, Denghai.,Chen, Yun.,Ma, Xiaobing.,Chen, Lin.,...&Yan, Yongli.(2019).Contrasting crustal deformation mechanisms in the Longmenshan and West Qinling orogenic belts, NE Tibet, revealed by magnetotelluric data.JOURNAL OF ASIAN EARTH SCIENCES,176,120-128.
MLA Xue, Shuai,et al."Contrasting crustal deformation mechanisms in the Longmenshan and West Qinling orogenic belts, NE Tibet, revealed by magnetotelluric data".JOURNAL OF ASIAN EARTH SCIENCES 176(2019):120-128.
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