DOI: 10.1016/j.earscirev.2019.102907
论文题名: Birth and demise of the Bangong-Nujiang Tethyan Ocean: A review from the Gerze area of central Tibet
作者: Li S. ; Yin C. ; Guilmette C. ; Ding L. ; Zhang J.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 198 语种: 英语
中文关键词: Bangong-Nujiang suture zone
; Lhasa-Qiangtang collision
; Meso-Tethys
; Subduction-accretion
; Tibetan Plateau
; Wilson cycle
英文关键词: accretion
; collision zone
; Gondwana
; lithostratigraphy
; magmatism
; metamorphism
; oceanic crust
; ophiolite
; Permian
; subduction
; suture zone
; Bangong Co-Nujiang Suture Zone
; China
; Gerze
; Qinghai-Xizang Plateau
; Xizang
英文摘要: Reconstructing the evolution of the Bangong-Nujiang Tethyan Ocean (BNTO) plays an indispensable role in understanding the linkage between Gondwana dispersion and Tibetan Plateau accretion. The existence of the BNTO is inferred from presence of dismembered ophiolite bodies along the Bangong-Nujiang suture zone, which separates Lhasa from Qiangtang. In this paper, we present a detailed synthesis of ophiolite, metamorphism, magmatism, lithostratigraphy and tectonism from the western segment (Gerze area) of the Lhasa-Qiangtang collision zone in order to reconstruct the Wilson cycle of the BNTO. Our results suggest that the BNTO initially opened in the Late Permian (~260 Ma), as indicated by the earliest record of oceanic crust. Regionally, strong evidence supports a northward subduction of the BNTO beneath Qiangtang, likely initiating in the Early Jurassic (~195 Ma). As suggested by detrital zircon age spectra from Mesozoic arc-sourced strata, northward oceanic subduction generated three episodes of arc magmatism, i.e., ~186–170 Ma, ~169–146 Ma and ~129–100 Ma along the southern Qiangtang margin, in which the Early Jurassic magmatism is only sporadically preserved in modern outcrops (Amdo area). Meanwhile, the recognition of an incomplete arc-trench system on the northern Lhasa margin supports a southward subduction beneath Lhasa as well. Our new provenance data from Lower Cretaceous strata on the northern Lhasa margin, together with available multi-disciplinary constraints, suggest that final closure of the BNTO did not occur until the latest Jurassic-Early Cretaceous (~150–130 Ma). Therefore, the Wilson cycle of the BNTO is hereby reconstructed, providing significant insights into the amalgamation of the Tibetan Plateau. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165854
Appears in Collections: 气候变化与战略
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作者单位: Guangdong Provincial Key Laboratory of Mineral Resources & Geological Processes, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China; Département de Géologie et Génie Géologique, Université Laval, Québec, G1V 0A6, Canada; Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China
Recommended Citation:
Li S.,Yin C.,Guilmette C.,et al. Birth and demise of the Bangong-Nujiang Tethyan Ocean: A review from the Gerze area of central Tibet[J]. Earth Science Reviews,2019-01-01,198