气候变化领域集成服务门户(CCPortal): Geodetic imaging of shallow creep along the Xianshuihe fault and its frictional properties

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DOI	10.1016/j.epsl.2021.117001
	Geodetic imaging of shallow creep along the Xianshuihe fault and its frictional properties
	Qiao X.; Zhou Y.
发表日期	2021
ISSN	0012821X
卷号	567
英文摘要	The Xianshuihe fault is one of the most tectonically active faults in the eastern Tibetan plateau. Understanding its slip behaviour and frictional properties is essential for determining the seismic potential. We use Sentinel-1A/B data from ascending and descending tracks to estimate the deformation field and retrieve three-dimensional velocities during the period of 2014-2019. We find that shallow creep is widely distributed along the entire Xianshuihe fault. Elastic dislocation modelling based on fault-parallel velocities reveals that the tectonic loading rate along the Xianshuihe fault is in the range of 8.8-17.9 mm/yr with a locking depth of 7.6-18.5 km. The shallow aseismic slip rate ranges from 3.3-7.8 mm/yr on the Daofu and Qianning segments, to 16.3-19.8 mm/yr on the western Kangding segment; the high aseismic slip rate on the western Kangding segment is likely due to postseismic relaxation of the 2014 Kangding Mw 5.6 and 5.9 earthquakes. The seismic moment accumulated on the Qianning segment since the last major event is equivalent to a Mw 6.6 earthquake. Analysis of the evolution of aseismic slip in the framework of rate-and-state friction shows that the Kangding segment has a much smaller (a-b) (0.0030) than the Daofu segment, (a-b) = 0.0162. The difference is potentially controlled by different rock types between the Kangding segment (granite) and other segments of the Xianshuihe fault (quartz-rich sandstone). © 2021 Elsevier B.V.
关键词	creep rate-and-state frictional properties Sentinel-1 Xianshuihe fault
英文关键词	Creep; Earthquakes; Locks (fasteners); Active fault; Behaviour properties; Deformation field; Eastern Tibetan plateau; Frictional properties; Rate-and-state frictional property; Sentinel-1; Slip behavior; Slip rates; Xianshuihe fault; Friction; active fault; creep; deformation; fault slip; fault zone; friction; geodesy; Sentinel; China; Qinghai-Xizang Plateau
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203260
作者单位	Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China
推荐引用方式 GB/T 7714	Qiao X.,Zhou Y.. Geodetic imaging of shallow creep along the Xianshuihe fault and its frictional properties[J],2021,567.
APA	Qiao X.,&Zhou Y..(2021).Geodetic imaging of shallow creep along the Xianshuihe fault and its frictional properties.Earth and Planetary Science Letters,567.
MLA	Qiao X.,et al."Geodetic imaging of shallow creep along the Xianshuihe fault and its frictional properties".Earth and Planetary Science Letters 567(2021).