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Crustal tilting and differential exhumation of Gangdese Batholith in southern Tibet revealed by bedrock pressures
Cao, Wenrong1; Yang, Jiaming1; Zuza, Andrew, V2; Ji, Wei-Qiang3; Ma, Xu-Xuan4; Chu, Xu5; Burgess, Quentin R.1
2020-08-01
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
Volume543Pages:12
AbstractThe exhumation history of the Gangdese Batholith, southern Tibet, bears on how magmatism and tectonism interact with surface processes in a long-lived magmatic orogen. In this study, we applied Alin-hornblende barometry across the eastern Gangdese Batholith to obtain pluton emplacement pressures. Our results, together with existing bedrock pressure data, reveal the regional paleo-depth pattern across the Gangdese Batholith. The western part of the batholith, near Lhasa, exposes plutons emplaced at 1-2 kbar whereas the eastern part, near Nyingchi, exposes crust recording pressures typically of 6-12 kbar. We coupled pressure data with new and published U-Pb zircon ages to constrain the exhumation history of the Gangdese Batholith. The results show that since 100 Ma, the upper crust experienced limited exhumation except a pronounced Oligocene-Miocene pulse. In contrast, the middle-lower crust experienced a complex exhumation and burial history, reflecting major tectonic events including the development of continental arc and continent-continent collision. Since ca. 10 Ma, the eastern Nyingchi sector experienced fast exhumation (total exhumation > 40 km), which was likely related to the exhumation of the Eastern Himalayan Syntaxis. The Lhasa sector experienced comparatively limited exhumation (total exhumation < 10 km). Such dramatic differential exhumation along the E-W direction requires that the Gangdese Batholith was tilted to present-day exposure levels. Our study shows that during the evolution of a magmatic orogen, the upper and middle-lower crust can behave differently, and the exhumation history reflects integrated tectonic, magmatic, and surface processes. The surface erosion rate estimates can be used to calculate CO2 consumption and evaluate the roles of magmatic orogens in the long-term carbon cycle. Given its great exposures of plutonic and metamorphic rocks across a relatively continuous crustal section, the Gangdese Batholith has great potential to serve as a natural laboratory to understand the structures and evolution of the continental crust. (C) 2020 Elsevier B.V. All rights reserved.
KeywordGangdese Batholith southern Tibet pluton emplacement depth crustal tilting exhumation
DOI10.1016/j.epsl.2020.116347
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF
WOS KeywordEASTERN HIMALAYAN SYNTAXIS ; METAMORPHIC EVOLUTION ; SIERRA-NEVADA ; ARC ; CONSTRAINTS ; EROSION ; HORNBLENDE ; MAGMATISM ; PLATEAU ; RECORD
Language英语
Funding ProjectNational Natural Science Foundation of China[41888101] ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant[2019QZKK0802] ; National Science Foundation (NSF)[EAR-1830139] ; National Science Foundation (NSF)[EAR-1914501] ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant[SKL-Z201706] ; NSF[EAR-1649254] ; NSF[EAR-1912713]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) Grant ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution grant ; NSF ; NSF
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000540452500009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96921
Collection岩石圈演化国家重点实验室
Corresponding AuthorCao, Wenrong
Affiliation1.Univ Nevada, Dept Geol Sci & Engn, MS 172,1664 N Virginia St, Reno, MS 89557 USA
2.Univ Nevada, Nevada Bur Mines & Geol, MS 178,1664 N Virginia St, Reno, MS 89557 USA
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
4.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Minist Nat Resources, Beijing 100037, Peoples R China
5.Univ Toronto, Dept Earth Sci, 22 Russell St, Toronto, ON M5S 3B1, Canada
Recommended Citation
GB/T 7714
Cao, Wenrong,Yang, Jiaming,Zuza, Andrew, V,et al. Crustal tilting and differential exhumation of Gangdese Batholith in southern Tibet revealed by bedrock pressures[J]. EARTH AND PLANETARY SCIENCE LETTERS,2020,543:12.
APA Cao, Wenrong.,Yang, Jiaming.,Zuza, Andrew, V.,Ji, Wei-Qiang.,Ma, Xu-Xuan.,...&Burgess, Quentin R..(2020).Crustal tilting and differential exhumation of Gangdese Batholith in southern Tibet revealed by bedrock pressures.EARTH AND PLANETARY SCIENCE LETTERS,543,12.
MLA Cao, Wenrong,et al."Crustal tilting and differential exhumation of Gangdese Batholith in southern Tibet revealed by bedrock pressures".EARTH AND PLANETARY SCIENCE LETTERS 543(2020):12.
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