气候变化领域集成服务门户(CCPortal): Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China

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DOI	10.1007/s11069-020-04040-6
	Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China
	Li A.; Ran Y.; Gomez F.; Thompson Jobe J.A.; Liu H.; Xu L.
发表日期	2020
ISSN	0921030X
起始页码	1385
结束页码	1406
卷号	103 期号:1
英文摘要	Decreasing deformation rates across the southern Tianshan have led to different seismogenic mechanisms and different proposed models to explain the orogen-scale fault kinematics. In this study, we focus on the segmentation of the Kepingtage fault by studying variations in the total offset and shortening rates of the Kepingtage fault along the southern front of the Tianshan. We used fault scarp mapping and trench excavations to assess fault segmentation and deformation on the Kepingtage fault. Our results indicate there are different shortening rates on the western (2.5–2.7 mm/year) versus the eastern segments (~ 0.3 mm/year), which are separated by the Piqiang tear fault. The decrease in shortening rates is not gradual; instead, it decreases sharply from west to east at the Piqiang fault. These segmentation boundaries are also supported by geodetic data and balanced structural restorations. Our data support a model where strike-slip faults accommodate step-changes in the deformation rates and the earthquake risks from west to east across the Tianshan. © 2020, The Author(s).
关键词	Fault segmentation Kepingtage fault Paleoearthquake rupture Shortening rate Tianshan
英文关键词	deformation; earthquake rupture; fault scarp; segmentation; strike-slip fault; thrust fault; China; Tien Shan
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205784
作者单位	Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing, 100085, China; Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing, 100029, China; Department of Geological Sciences, University of Missouri, Columbia, MO 65211, United States; Department of Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401, United States; China Earthquake Disaster Prevention Center, Beijing, 100029, China; Earthquake Administration of Shanxi Province, Xian, 710068, China
推荐引用方式 GB/T 7714	Li A.,Ran Y.,Gomez F.,et al. Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China[J],2020,103(1).
APA	Li A.,Ran Y.,Gomez F.,Thompson Jobe J.A.,Liu H.,&Xu L..(2020).Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China.Natural Hazards,103(1).
MLA	Li A.,et al."Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China".Natural Hazards 103.1(2020).