气候变化领域集成服务门户(CCPortal): Constraining Late Quaternary Crustal Shortening in the Eastern Qilian Shan From Deformed River Terraces

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DOI	10.1029/2020JB020631
	Constraining Late Quaternary Crustal Shortening in the Eastern Qilian Shan From Deformed River Terraces
	Zhong Y.; Xiong J.; Li Y.; Zheng W.; Zhang P.; Lu H.; Liu Q.; Lei J.; Chen G.; Gong Z.; Hu X.; Zhang H.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	The Qilian Shan, located in the northeastern Tibet, is under strong tectonic activity and earthquake motion due to the propagation of the plateau. At the mountain front of the eastern Qilian Shan, the Tongziba River, in the southern Zhangye Basin, flows northward and successively cuts the Minle-Damaying Fault and the Yonggu Anticline, two parallel structures within the Frontal Thrust system of the Qilian Shan. Here we present a detailed record of seven strath terraces of this river that documents the history of active deformation of the two structures. Based on the estimated crustal shortening distance from the deformed terraces and the terrace formation age constrained by AMS 14C and optically stimulated luminescence (OSL) dating, a horizontal slip rate of 1.4 ± 0.5 mm/year of the Minle-Damaying Fault is constrained since 16.7 ± 1.8 kyr, and a shortening rate of 1.3 ± 0.4 mm/year across the Yonggu Anticline has been estimated in a similar time frame, respectively. In total, the shortening rate across the mountain front is estimated to be 2.7 ± 0.6 mm/year. GPS data show a similar modern shortening rate in this area, which indicates the rate of crustal shortening may be comparable in the modern and 104-year scales. Our study supports a higher crustal shortening rate along the mountain front of the eastern Qilian Shan than that of the western Qilian Shan since the Late Quaternary. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Crustal Shortening; Deformation Distribution; Fluvial Terrace; Qilian Shan; Tibetan Plateau
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187620
作者单位	Key Laboratory of Earth Surface Processes of Ministry of Education, Peking University, Beijing, China; Department of Earth Sciences, ETH Zurich, Zurich, Switzerland; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China; Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Science and Engineering, Sun Yat-sen University, Guangzhou, China; Key Laboratory of Geographic Information Science of Ministry of Education and Institute of Eco-Chongming (IEC), East China Normal University, Shanghai, China
推荐引用方式 GB/T 7714	Zhong Y.,Xiong J.,Li Y.,et al. Constraining Late Quaternary Crustal Shortening in the Eastern Qilian Shan From Deformed River Terraces[J],2020,125(9).
APA	Zhong Y..,Xiong J..,Li Y..,Zheng W..,Zhang P..,...&Zhang H..(2020).Constraining Late Quaternary Crustal Shortening in the Eastern Qilian Shan From Deformed River Terraces.Journal of Geophysical Research: Solid Earth,125(9).
MLA	Zhong Y.,et al."Constraining Late Quaternary Crustal Shortening in the Eastern Qilian Shan From Deformed River Terraces".Journal of Geophysical Research: Solid Earth 125.9(2020).