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Early Tertiary deformation of the Zhongba-Gyangze Thrust in central southern Tibet
Wang, HQ (Wang, Hou-Qi)1,2,3; Ding, L (Ding, Lin)1,2; Cai, FL (Cai, Fu-Long)1,2; Xu, Q (Xu, Qiang)1,2; Li, S (Li, Shun)1,2,3; Fu, JJ (Fu, Jia-Jun)1,4; Lai, QZ (Lai, Qing-Zhou)1,2; Yue, YH (Yue, Ya-Hui)1,2; Li, X (Li, Xin)1,2; Wang, HQ
Source PublicationGONDWANA RESEARCH
2017
Volume41Issue:0Pages:235-248
DOI10.1016/j.gr.2015.02.017
AbstractAs the boundary thrust between India and Asia in southern Tibet, the Zhongba-Gyangze Thrust (ZGT) emplaced the Yarlung Zangbo Suture Zone (YZSZ) units in the hanging wall southward onto Tethyan Himalaya sequences (THS) of the northern Indian continental margin in the footwall. Detailed field investigation, electron backscatter diffraction (EBSD) analysis, detrital zircon U-Pb geochronology and Ar-40-Ar-39 thermochronology were conducted to understand the evolution of the ZGT in Sangsang area, central southern Tibet. The shear zone of ZGT is located within the sedimentary-matrix melange of YZSZ that is mainly composed of matrix of blueschist with meta pelagic-hemipelagic siliceous and siliciclastic rocks and blocks of basalt, limestone and sandstone. Penetrative F1 foliation and kink band structure were recorded within the matrix both on outcrop and under microscope. Strong lattice preferred orientation (LPO) fabric initiated by the low-temperature (350-450 degrees C) (010)[ 001] slip system was detected by EBSD in the sodic amphiboles of the blueschist. The 40Ar-39Ar ages of the phengites from blueschist and sericites from the phyllite in the shear zone indicate that the activity of ZGT occurred between 71 and 60 Ma. In the THS, a newly documented younger unit preserving detrital zircons from the southern Asian margin lies above the Triassic-Cretaceous sequences that carries only detrital zircons from the Indian continent. This unit is dated to be similar to 61 Ma by the detrital zircon ages, similar to the Sangdanlin Formation and representing the Yarlung Zangbo Foreland Basin (YZFB) system. The ZGT had probably been active due to the initial India-Asia collision and acted as the frontal thrust controlling the development of YZFB. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Subject Area地质学
WOS IDWOS:000397873300016
Language英语
Indexed BySCI
KeywordINDIA-ASIA COLLISION ZIRCON U-PB ZANGBO SUTURE ZONE YARLUNG-TSANGPO SUTURE FORE-ARC BASIN SUBDUCTION-ACCRETION PROCESSES HF ISOTOPIC CONSTRAINTS LHASA TERRANE SOUTHEASTERN TIBET EURASIA COLLISION
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary ; Geology
Cooperation Status国内
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8387
Collection图书馆
Corresponding AuthorWang, HQ
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China.
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
4.Fujian Inst Geol Survey, Fuzhou 350013, Peoples R China.
Recommended Citation
GB/T 7714
Wang, HQ ,Ding, L ,Cai, FL ,et al. Early Tertiary deformation of the Zhongba-Gyangze Thrust in central southern Tibet[J]. GONDWANA RESEARCH,2017,41(0):235-248.
APA Wang, HQ .,Ding, L .,Cai, FL .,Xu, Q .,Li, S .,...&Wang, HQ.(2017).Early Tertiary deformation of the Zhongba-Gyangze Thrust in central southern Tibet.GONDWANA RESEARCH,41(0),235-248.
MLA Wang, HQ ,et al."Early Tertiary deformation of the Zhongba-Gyangze Thrust in central southern Tibet".GONDWANA RESEARCH 41.0(2017):235-248.
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