globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2021.228966
论文题名:
Late Cenozoic thrust propagation within the Keping fold-and-thrust belt along the southern foreland of Chinese Tian Shan: Evidence from apatite (U[sbnd]Th)/He results
作者: Lü L.; Sun J.; Jia Y.; Wu L.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 814
语种: 英语
中文关键词: Apatite (U[sbnd]Th)/He ; Deformation age ; Fold-and-thrust ; Thrust ; Tian Shan
英文关键词: Apatite ; Tectonics ; Crustal shortening ; Fold-and-thrust belts ; Late Cenozoic ; Propagation process ; Sandstone samples ; Single grains ; Tectonic deformations ; Thrust systems ; Deformation ; apatite ; Cenozoic ; crustal shortening ; deformation ; fold and thrust belt ; foreland basin ; uranium series dating ; China ; Tien Shan
英文摘要: The Keping fold-and-thrust belt (FTB) is located along the southern foreland of the Chinese Tian Shan, consisting of 3–6 rows of E- to NE-trending thrusts. Determining the time of thrusting and folding within the Keping FTB is crucial to understand the process and characteristic of tectonic deformation along the southern Tian Shan foreland. Here, we present new deformation ages of four thrusts within the Keping FTB by using the apatite (U[sbnd]Th)/He thermochronometer. Based on analyses of 59 single-grain apatite (U[sbnd]Th)/He ages of 13 sandstone samples collected from the hanging-walls of the four thrusts, the deformation ages of two thrusts located at the northern part of the western Keping FTB were constrained to be ~12 Ma and ~ 11 Ma, respectively; while those of two thrusts located at the southern part of the eastern Keping FTB were interpreted to be ~14 Ma and ~ 13 Ma, respectively. The above deformation ages, together with previous studies, suggest that the Cenozoic deformation across the southern Tian Shan foreland initiated at ~16–12 Ma, and the propagation process of the Keping thrust system is laterally non-synchronous. Additionally, the million-year-scale crustal shortening rates of the Keping FTB were recalculated to be ~2.2–3.9 mm/yr in its western segment and ~ 1.3–3.6 mm/yr in its eastern segment, based on the new age constraints of initial tectonic deformation and published shortening estimates. © 2021
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170853
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; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China

Recommended Citation:
Lü L.,Sun J.,Jia Y.,et al. Late Cenozoic thrust propagation within the Keping fold-and-thrust belt along the southern foreland of Chinese Tian Shan: Evidence from apatite (U[sbnd]Th)/He results[J]. Tectonophysics,2021-01-01,814
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