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Western Tibet relief evolution since the Oligo-Miocene
Gourbet, L (Gourbet, Loraine)1; Maheo, G (Maheo, Gweltaz)1; Leloup, PH (Leloup, Philippe Herve)1; Paquette, JL (Paquette, Jean-Louis)2; Sorrel, P (Sorrel, Philippe)1; Henriquet, M (Henriquet, Maxime)1; Liu, X (Liu, Xiaobing)1,3; Liu, X (Liu, Xiaohan)3; Gourbet, L
Source PublicationGONDWANA RESEARCH
2017
Volume41Issue:0Pages:425-437
DOI10.1016/j.gr.2014.12.003
AbstractWestern Tibet, between the Karakorumfault and the Gozha-Longmu Co fault system, is mostly internally drained and has a 1.5-2 km amplitude relief with km-large valleys. We investigate the origin of this peculiar morphology by combining a topography analysis and a study of the Cenozoic sedimentation in this area. Cenozoic continental strata correspond to a proximal, detrital fan deposition, and uncomformably rest on a palaeorelief similar to the modern one. Zircon U-Pb dating from trachytic flows interbedded within the Cenozoic continental sediments indicates that detrital sedimentation occurred at least between ca 24 and 20 Ma in the Shiquanhe basin, while K/Ar ages suggest it may have started since similar to 37 Ma in the Zapug basin. The distribution of continental deposits shows that present-day morphology features, including km-large, 1500 m-deep valleys, were already formed by Early Miocene times. We suggest that today's internally drained western Tibet was externally drained, at least during late Miocene, contemporaneously with early motion along the Karakorum Fault. Detailed study of the present day river network is compatible with a dextral offset on the Karakorum Fault of 250 km at a rate of similar to 10 +/- 1 mm/yr. Displacement along the Karakorum fault possibly induced the shift from external to an internal drainage system, by damming of the Bangong Co similar to 4 Ma ago, leading to the isolation and preservation of the western Tibet relief. (C) 2014 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Subject Area地质学
WOS IDWOS:000397873300028
Language英语
Indexed BySCI
KeywordOFFSET GEOLOGIC MARKERS INDIA-ASIA COLLISION KARAKORAM FAULT ZONE NORTHWEST HIMALAYA SOUTHERN TIBET NW HIMALAYA TECTONIC IMPLICATIONS LUNPOLA BASIN SLIP RATES PLATEAU
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary ; Geology
Cooperation Status国际
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8392
Collection图书馆
Corresponding AuthorGourbet, L
Affiliation1.Univ Lyon 1, Univ Lyon, Ecole Normale Super Lyon, CNRS UMR 5276,Lab Geol Lyon, 2 Rue Dubois, F-69622 Villeurbanne, France.
2.Lab Magmas & Volcans, 5 Rue Kessler, F-63038 Clermont Ferrand, France.
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China.
Recommended Citation
GB/T 7714
Gourbet, L ,Maheo, G ,Leloup, PH ,et al. Western Tibet relief evolution since the Oligo-Miocene[J]. GONDWANA RESEARCH,2017,41(0):425-437.
APA Gourbet, L .,Maheo, G .,Leloup, PH .,Paquette, JL .,Sorrel, P .,...&Gourbet, L.(2017).Western Tibet relief evolution since the Oligo-Miocene.GONDWANA RESEARCH,41(0),425-437.
MLA Gourbet, L ,et al."Western Tibet relief evolution since the Oligo-Miocene".GONDWANA RESEARCH 41.0(2017):425-437.
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