globalchange  > 气候变化与战略
DOI: 10.1007/s11069-020-04040-6
论文题名:
Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China
作者: Li A.; Ran Y.; Gomez F.; Thompson Jobe J.A.; Liu H.; Xu L.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期:1
起始页码: 1385
结束页码: 1406
语种: 英语
中文关键词: 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
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).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168583
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Li A.,Ran Y.,Gomez F.,et al. Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China[J]. Natural Hazards,2020-01-01,103(1)
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