DOI: 10.1016/j.earscirev.2020.103470
论文题名: Tectonic evolution of the Sichuan Basin, Southwest China
作者: Liu S. ; Yang Y. ; Deng B. ; Zhong Y. ; Wen L. ; Sun W. ; Li Z. ; Jansa L. ; Li J. ; Song J. ; Zhang X. ; Peng H.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2021
卷: 213 语种: 英语
中文关键词: Eastern Tibetan Plateau
; Intracratonic sag
; Palaeo-uplift
; Sichuan basin
; Structural decoupling
; Superimposed basin
英文关键词: correlation
; craton
; deformation
; fold and thrust belt
; geometry
; Paleozoic
; sedimentary sequence
; tectonic evolution
; uplift
; China
; Qinghai-Xizang Plateau
; Sichuan Basin
英文摘要: Surface deformation in continental interiors is typically coupled to processes at depth. However, in the Sichuan basin, east of the Tibetan Plateau, recent seismic data detect Neoproterozoic subduction and rifts, indicating long-term tectonic quiescence of the basement. The Sichuan basin is characterized by two episodes of weak extension and compression which influenced the architecture of the marine platform during Palaeozoic to Middle Triassic times. The weak extensional episodes occurred in the early Cambrian and late Permian, characterized by formation of intracratonic sags oriented at high angles to the basin margins, the early Cambrian Mianyang-Changning sag and the late Permian Kaijiang-Liangping sag. The formation of these sags was followed by weak compressional episodes that formed the Caledonian (Early Palaeozoic) Leshan-Longnvshi palaeo-uplift and the Mid. to Late Triassic Luzhou and Kaijiang palaeo-uplifts. These intracratonic sags and palaeo-uplifts show no genetic correlation in terms of geometry or inherited deformation. Subsequent evolution of the Sichuan basin was characterised by foreland basins controlled by the Longmenshan and Dabashan fold-and-thrust belts along the western and northeastern margins of the basin respectively. A large wedge-shaped body of strata was subsequently eroded, removing of 2.0-3.0 km of rock in the Cenozoic. The subsidence history of the Sichuan basin is characterized by an increase in subsidence rate due to the formation of the foreland basins and by a subsequent period of uplift and exhumation. We argue that structural decoupling occurred both between the sedimentary cover and the basement and between the multiple sedimentary sequences in the Sichuan basin. The Sichuan basin may thus represent a unique type of superimposed basin, as its evolution appears to have been controlled by deformation propagated from its peripheral orogens. This suggests a mechanism of basin architecture controlled by crustal deformation, rather than by deep lithospheric and mantle processes. © 2020 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166453
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation/Chengdu University of Technology, Chengdu, China; Xihua University, Chengdu, China; Exploration & Development Research Institute, PetroChina Southwest Oil and Gasfield Company, Chengdu, China; Earth Science Department, Dalhousie University, Halifax, N.S., Canada
Recommended Citation:
Liu S.,Yang Y.,Deng B.,et al. Tectonic evolution of the Sichuan Basin, Southwest China[J]. Earth Science Reviews,2021-01-01,213