DOI: 10.1007/s00531-017-1478-5
Scopus记录号: 2-s2.0-85018800956
论文题名: Structure and development of the Changliangshan ductile shear zone, North Tibet: implications for the initial closure of the Paleo-Tethys Ocean in the central Qiangtang region
作者: Liu Y. ; Xie C. ; Li C. ; Li X.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 8 起始页码: 2945
结束页码: 2962
语种: 英语
英文关键词: Chronology
; Ductile shear zone
; Paleo-Tethys Ocean
; Tibetan Plateau
Scopus关键词: argon-argon dating
; ductile deformation
; kinematics
; paleoceanography
; plate convergence
; shear zone
; slip rate
; strike-slip fault
; structural geology
; tectonic evolution
; uplift
; uranium-lead dating
; China
; Qiangtang Basin
; Qinghai-Xizang Plateau
; Xizang
英文摘要: The Changliangshan ductile shear zone extends ~80 km in an east–west direction in central Qiangtang, Tibetan Plateau. Structural and kinematic analyses show that the shear zone comprises mainly protomylonite, mylonite, and phyllite with dextral-dominated strike–slip motion in the northern branch of the shear zone and sinistral strike–slip shear in the southern branch. Concordant U–Pb ages on the metamorphic rims of zircons from mylonite indicate that deformation along the shear zone started at 249.1 ± 6.7 Ma during the initial collision between the North and South Qiangtang terranes. The 40Ar/39Ar ages of sericite (221–215 Ma), combined with available kinematic and structural data, indicate that the metamorphic rocks of the shear zone experienced transpressional exhumation and uplift during the Late Triassic. In addition, the E–W-trending Changliangshan ductile shear zone marks the contact between Yangtze-type (warm-water) and Gondwana-type (cold-water) deposits. The initial NE–SW-directed collision gave rise to shearing along the Changliangshan ductile shear zone under lower- to middle-greenschist facies conditions during the Early–Middle Triassic. Subsequently, the Yangtze-type sediments passively pierced the Gondwana-type deposits as a wedge-shaped unit along the shear zone. Furthermore, the data reveal that the Changliangshan shear zone formed during oblique convergence between the North and South Qiangtang terranes during initial closure of the Paleo-Tethys. © 2017, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018800956&doi=10.1007%2fs00531-017-1478-5&partnerID=40&md5=cb75ffb76e64f08f2721ef835d9fab97
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69941
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: College of Earth Sciences, Jilin University, 2199 Jianshe Street, Changchun, China; Lab of Continental Collision and Plateau Uplift, Qinghai–Tibet Plateau Institute of the Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Liu Y.,Xie C.,Li C.,et al. Structure and development of the Changliangshan ductile shear zone, North Tibet: implications for the initial closure of the Paleo-Tethys Ocean in the central Qiangtang region[J]. International Journal of Earth Sciences,2017-01-01,106(8)