气候变化领域集成服务门户(CCPortal): Neotectonics of the Bailongjiang and Hanan faults: New insights into late Cenozoic deformation along the eastern margin of the Tibetan Plateau

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DOI	10.1130/B35374.1
	Neotectonics of the Bailongjiang and Hanan faults: New insights into late Cenozoic deformation along the eastern margin of the Tibetan Plateau
	Li H.; Zhang Y.; Dong S.; Zhang J.; Sun Y.; Wang Q.
发表日期	2020
ISSN	167606
起始页码	1845
结束页码	1862
卷号	132 期号:2021-09-10
英文摘要	The way that far-field stresses and deformation propagated eastward in response to the growth and extrusion of the northeastern Tibetan Plateau remains a crucial scientific issue. This paper focuses on the Bailongjiang and Hanan faults, which are the easternmost part of the East Kunlun fault in northeast Tibet. Based on new field geological investigations, structural data, satellite imagery interpretation, and optically stimulated luminescence and 14C dating results, this paper presents the structural geometry and neotectonic activities of the two faults. The ~200-km-long Bailongjiang fault, bounding the Bayan Har block in northeast Tibet, consists of two segments. Along the western segment, late Pleistocene lacustrine-facies deposits and Holocene activities were discovered in a great fault scarp. The left-slip rate of the fault is estimated to be ~1.73-2.61 mm/yr, with an elapsed time of ~2205 yr after a catastrophic paleoseismic event greater than M 7.2 ruptured the fault. The eastern segment splits into two branches and shows a positive flower structure where a pull-apart basin developed, filled with ~200-m-thick mudstone and argillaceous siltstone, which record the mid-late Miocene deformation of the Bailongjiang fault. The Hanan fault features reverse faulting caused by NNW-SSE compression in the late Cenozoic. The two faults, together with the Maqên-Maqu-Tazang fault, confine the area of a strip block, the eastward extrusion of which was accommodated by thrusting due to the resistance of the stable Bikou massif since the late Cenozoic, which led to decreasing slip rates along the easternmost part of the Kunlun fault. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184718
作者单位	Chinese Academy of Geological Sciences, Beijing, 100037, China; School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; Institute of Earthquake Forecasting, China Earthquake Administration, Beijing, 100081, China
推荐引用方式 GB/T 7714	Li H.,Zhang Y.,Dong S.,et al. Neotectonics of the Bailongjiang and Hanan faults: New insights into late Cenozoic deformation along the eastern margin of the Tibetan Plateau[J],2020,132(2021-09-10).
APA	Li H.,Zhang Y.,Dong S.,Zhang J.,Sun Y.,&Wang Q..(2020).Neotectonics of the Bailongjiang and Hanan faults: New insights into late Cenozoic deformation along the eastern margin of the Tibetan Plateau.Bulletin of the Geological Society of America,132(2021-09-10).
MLA	Li H.,et al."Neotectonics of the Bailongjiang and Hanan faults: New insights into late Cenozoic deformation along the eastern margin of the Tibetan Plateau".Bulletin of the Geological Society of America 132.2021-09-10(2020).