DOI: 10.1016/j.tecto.2020.228438
论文题名: Late Miocene accelerated exhumation in the central Tajik Basin and implications for northward indention and lateral growth of the Pamir
作者: Lü L. ; Sun J. ; Zhang Z. ; Jia Y. ; Tian S. ; Abdulov S. ; Gadoev M. ; Oimahmadov I.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 787 语种: 英语
中文关键词: Apatite (U[sbnd]Th)/He
; Fold-and-thrust belt
; Late Miocene
; Pamir
; Tajik Basin
英文关键词: Apatite
; Deformation
; Structural geology
; Basin inversions
; Compressional tectonics
; Convergence zones
; Growth history
; Sandstone samples
; Tectonic deformations
; Thermal history simulation
; Thermochronometry
; Faulting
; exhumation
; Miocene
; plate tectonics
; structural geology
; tectonic evolution
; tectonic setting
; Pamirs
英文摘要: The Tajik Basin, located at the west of the Pamir, is characterized by a series of thin-skinned folds and thrusts within its interior. Constraining the onset of deformation of these structures is important both for illustrating basin inversion process and for understanding growth history of the adjacent Pamir. To date, the timing of thrusting and folding within the Tajik Basin has not been well studied. In this study, we determined the timing of fault motion of the Aruntau thrust in the central Tajik Basin by using apatite (U[sbnd]Th)/He thermochronometry. Apatite (U[sbnd]Th)/He age data of sandstone samples collected from the hanging wall of the Aruntau thrust fault, combined with thermal history simulation, constrains the onset of rapid cooling of rock samples at ca. 10–6 Ma. Given the compressional tectonic regime, we propose that the observed rapid cooling was caused by thrust-induced exhumation, and thus, the cooling age of ~10–6 Ma approximately represents the timing of thrusting initiation. Integrated with previous studies, we found that the late Miocene tectonic deformation was not only circumscribed within the Tajik Basin, but also occurred in the areas north and east of the Pamir and within the Pamir. We suggest that the synchronously widespread tectonic deformation in the Pamir-Tian Shan convergence zone reflects the enhanced northward indentation and lateral growth of the Pamir since the late Miocene. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170650
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Institute of Geology, Earthquake Engineering and Seismology of the Academy of Sciences, Tajikistan
Recommended Citation:
Lü L.,Sun J.,Zhang Z.,et al. Late Miocene accelerated exhumation in the central Tajik Basin and implications for northward indention and lateral growth of the Pamir[J]. Tectonophysics,2020-01-01,787