气候变化领域集成服务门户(CCPortal): 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

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DOI	10.1016/j.tecto.2021.228966
	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
	Lü L.; Sun J.; Jia Y.; Wu L.
发表日期	2021
ISSN	00401951
卷号	814
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
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
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208020
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
推荐引用方式 GB/T 7714	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],2021,814.
APA	Lü L.,Sun J.,Jia Y.,&Wu L..(2021).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.Tectonophysics,814.
MLA	Lü L.,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".Tectonophysics 814(2021).