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An intracontinental orogen exhumed by basement-slice imbrication in the Longmenshan Thrust Belt of the Eastern Tibetan Plateau
Xue, Zhenhua1,2,3; Lin, Wei2,4; Chu, Yang2,4; Faure, Michel3; Chen, Yan3; Ji, Wenbin5; Qiu, Huaning6
2022
Source PublicationGEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN0016-7606
Volume134Issue:1-2Pages:15-38
AbstractThe Longmenshan Thrust Belt in Eastern Tibet resulted from a Mesozoic orogeny and Cenozoic reworking. It is generally believed that the Cenozoic tectonics along the Longmenshan Thrust Belt are mostly inherited from the Mesozoic. Reconstructing the Mesozoic tectonics of the Longmenshan Thrust Belt is therefore important for understanding its evolutionary history. On the basis of detailed structural analysis, we recognized a Main Central Boundary that divides the Longmenshan Thrust Belt into a Southeastern Zone and a Northwestern Zone. Both zones underwent a main D-1 event characterized by D-1E top-to-the-SE thrusting in the Southeastern Zone and D-1w top-to-the-NW/N thrusting in the Northwestern Zone. In the Southeastern Zone, a D-2 top-to-the-NW/N normal faulting that cuts the D-1E structures is developed along the NW boundary of the basement complexes. Newly obtained and previous geochronological data indicate that the D-1E and D-1w events occurred synchronously at ca. 224-219 Ma, and the D2 top-to-the-NW/N normal faulting was episodically activated at ca. 166-160 Ma, 141-120 Ma, 81-47 Ma, and 27-25 Ma. Episodic and synchronously activated top-to-the-NW normal faulting and top-to-the-SE thrusting along the northwestern and southeastern boundaries of the basement complexes, respectively, leads us to propose that the basement slices were episodically imbricated to the SE during the Late Jurassic-Early Cretaceous and Late Cretaceous-earliest Paleocene. The D-1w amphibolite facies metamorphic rocks above the basement complexes recorded fast exhumation during the Late Jurassic-Early Cretaceous. We propose that the early Mesozoic northwestward basement underthrusting along a crustal "weak zone" was responsible for the D-1w double-vergent thrusting and amphibolite facies metamorphism. Subsequent basement-slice imbrications reworked the Longmenshan Thrust Belt and exhumed the amphibolite facies rocks. Our results highlight the importance of basement underthrusting and imbrication in the formation and reworking of the intracontinental Longmenshan Thrust Belt in Eastern Tibet.
DOI10.1130/B35826.1
Funding OrganizationNational Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET
WOS KeywordGARZE FOLD BELT ; SONGPAN-GARZE ; SOUTH CHINA ; U-PB ; SICHUAN BASIN ; GEOCHRONOLOGICAL CONSTRAINTS ; TECTONOTHERMAL EVOLUTION ; TRIASSIC GRANITOIDS ; STRUCTURAL-ANALYSIS ; TECTONIC EVOLUTION
Language英语
Funding ProjectNational Nature Science Foundation of China[91855212] ; National Nature Science Foundation of China[91755205] ; National Nature Science Foundation of China[41802219] ; National Key R&D Program of China[2016YFC0600401] ; National Key R&D Program of China[2016YFC0600102] ; French LABEX VOLTAIRE[ANR-10-LABX-100-01] ; EQUIPEX PLANET[ANR-11-EQPX-0036]
Funding OrganizationNational Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature 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 ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; French LABEX VOLTAIRE ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET ; EQUIPEX PLANET
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000740437800002
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/103971
Collection岩石圈演化国家重点实验室
Corresponding AuthorLin, Wei
Affiliation1.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Orleans, ISTO, BRGM, CNRS,UMR 7327, F-45071 Orleans, France
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
6.China Univ Geosci, Minist Educ, Key Lab Tecton & Petr Resources, Wuhan 430074, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Xue, Zhenhua,Lin, Wei,Chu, Yang,et al. An intracontinental orogen exhumed by basement-slice imbrication in the Longmenshan Thrust Belt of the Eastern Tibetan Plateau[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2022,134(1-2):15-38.
APA Xue, Zhenhua.,Lin, Wei.,Chu, Yang.,Faure, Michel.,Chen, Yan.,...&Qiu, Huaning.(2022).An intracontinental orogen exhumed by basement-slice imbrication in the Longmenshan Thrust Belt of the Eastern Tibetan Plateau.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,134(1-2),15-38.
MLA Xue, Zhenhua,et al."An intracontinental orogen exhumed by basement-slice imbrication in the Longmenshan Thrust Belt of the Eastern Tibetan Plateau".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 134.1-2(2022):15-38.
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