DOI: 10.1016/j.tecto.2019.228278
论文题名: An immediate response to the Indian-Eurasian collision along the northeastern Tibetan Plateau: Evidence from apatite fission track analysis in the Kuantan Shan-Hei Shan
作者: An K. ; Lin X. ; Wu L. ; Yang R. ; Chen H. ; Cheng X. ; Xia Q. ; Zhang F. ; Ding W. ; Gao S. ; Li C. ; Zhang Y.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 774 语种: 英语
中文关键词: Intracontinental deformation
; Jiuxi Basin
; Qilian Shan
; Rejuvenated orogen
; Thermochronology
英文关键词: Apatite
; Fission reactions
; Apatite fission-track analysis
; Continental collisions
; Jiuxi basin
; Northeastern tibetan plateaux
; Progressive deformation
; Qilian Shan
; Rejuvenated orogen
; Thermochronology
; Deformation
; apatite
; arc-continent collision
; Cenozoic
; deformation
; exhumation
; fission track dating
; orogeny
; thermochronology
; China
; Gansu
; Jiuxi Basin
; Qilian Mountains
; Qinghai-Xizang Plateau
英文摘要: The Tibetan Plateau offers an ideal region for understanding the processes of continental collision and related intracontinental deformation. However, when the Cenozoic deformation was initiated in the present northeastern margin of the plateau, >2000 km north to the Indian-Eurasian collision front, remains an issue in debate. Two competing end-member models have been proposed, involving immediate deformation response and progressive deformation propagation. Solving this problem partly relies on determining whether there was contemporaneous deformation with initial Indian-Eurasian collision along the northeastern margin of the Tibetan Plateau. In this study, we employ apatite fission track (AFT) analysis to shed new light on the exhumation history of the Kuantan Shan-Hei Shan along the northeastern margin of the Tibetan Plateau, with a motivation to determine whether deformation-related exhumation during initial collision stage occurred in the region. The 22 granite samples produce AFT ages ranging from 22.3 ± 2.6 Ma to 175 ± 18 Ma and mean track lengths from 11.17 ± 2.26 μm to 13.63 ± 1.93 μm. Thermal history modeling indicates five episodes of rapid exhumation-related cooling, which took place in the early Jurassic, early Cretaceous and late Cretaceous, during/since the Eocene and since the middle Miocene. The exhumation events prior to the Cenozoic are attributed to far-field responses of successive closure of fossil oceans and assembly of blocks along the southern margin of the Eurasian continent. The Eocene exhumation along the Kuantan Shan-Hei Shan is speculated to represent an immediate response to the initial Indian-Eurasian collision. These results lend support to the immediate deformation response model along the northeastern plateau. The episodic exhumation observed in this study, combined with previous geophysical findings, implies that the Kuantan Shan-Hei Shan represents the southern margin of the Alashan Block, serving as a significant and long-lived lithospheric weak zone susceptible to intracontinental deformation during episodes of far-field tectonic event. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170539
Appears in Collections: 气候变化与战略
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作者单位: School of Earth Sciences, Zhejiang University, Hangzhou, 310027, China; Research Center for Structures in Oil and Gas Bearing Basins, Ministry of Education, Hangzhou, 310027, China; Key Laboratory of Submarine Geoscience, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
Recommended Citation:
An K.,Lin X.,Wu L.,et al. An immediate response to the Indian-Eurasian collision along the northeastern Tibetan Plateau: Evidence from apatite fission track analysis in the Kuantan Shan-Hei Shan[J]. Tectonophysics,2020-01-01,774