气候变化领域集成服务门户(CCPortal): Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen

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DOI	10.1007/s00531-020-01880-2
	Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen
	Zhang Z.; Sun J.
发表日期	2020
ISSN	14373254
起始页码	1921
结束页码	1939
卷号	109 期号:6
英文摘要	The Pamir salient, defining the NW end of the Himalayan–Tibetan orogen, is a prominent curved orogen as a response to the Indian-Eurasian collision. Its evolution history is essential for understanding intracontinental tectonic processes in the context of continental collision. In this study, we carry out systematic paleomagnetic studies on four sections in different parts of the NE Pamir to unravel the tectonic evolution of the curved orogen. Our new results from the Oytag section suggest that the clockwise (CW) rotations of the eastern Pamir salient mainly occurred in the Oligocene (~ 32–26 Ma) as a response to the northward indentation of the Pamir salient and was dominated by large-scale dextral strike-slip faults since then. Additionally, the final collision between Pamir and SW Tian Shan in the latest Miocene reactivated the dextral Talas-Ferghana Fault (TFF), thus be responsible for the counter-clockwise (CCW) rotations at Ulugqat. However, the limited tectonic rotations of the Keliyang and Sanju sections can be explained by the dominant thrust faulting in the foreland of the West Kunlun Mountains. Combined with the existing paleomagnetic data around the Pamir salient, our results support a four-stage evolution: (1) a roughly linear orogen before the early Eocene; (2) symmetric rotations on both sides until the latest Oligocene followed by (3) asymmetric geometries with continued radial thrusting on the western flank and large-scale strike-slip fault on the eastern flank; and (4) final collision between the Pamir salient and SW Tian Shan in the late Miocene. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Curved orogen; Paleomagnetism; Pamir; Tarim Basin; Tectonic rotation
语种	英语
scopus关键词	Cenozoic; collision zone; Himalayan orogeny; orogeny; strike-slip fault; structural geology; tectonic evolution; tectonic setting; China; Kunlun Mountains; Pamirs
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147648
作者单位	Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Zhang Z.,Sun J.. Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen[J],2020,109(6).
APA	Zhang Z.,&Sun J..(2020).Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen.International Journal of Earth Sciences,109(6).
MLA	Zhang Z.,et al."Cenozoic tectonic rotations in different parts of the NE Pamir: implications for the evolution of the arcuate orogen".International Journal of Earth Sciences 109.6(2020).