气候变化领域集成服务门户(CCPortal): Newly discovered shallow creep along the Gozha Co fault in northwestern Tibet: Spatial extent, rate and temporal evolution

CCPortal

DOI	10.1016/j.epsl.2023.118388
	Newly discovered shallow creep along the Gozha Co fault in northwestern Tibet: Spatial extent, rate and temporal evolution
	Huang, Zicheng; Zhou, Yu; Zhang, Peizhen
发表日期	2023
ISSN	0012-821X
EISSN	1385-013X
卷号	621
英文摘要	Whereas most continental faults are interseismically locked, some exceptions have been observed to exhibit aseismic slip over a range of depths in the Earth's upper crust, i.e. shallow creep. This unusual slip behaviour helps probe frictional properties of natural faults. Here, we investigate the kinematic features of a newly discovered shallow creeping fault, the Gozha Co fault in northwestern Tibet, using Sentinel-1 radar interferometry. High-resolution velocities derived from 4 tracks of Sentinel-1 data reveal a 120-km-long creeping section on the Gozha Co fault, with a mean surface fault-parallel rate of -3 mm/yr. We use a simple elastic dislocation model to invert for the rate and depth extent of creep. Results show that creep occurs at all depths in the crust at the tectonic loading rate, -5 mm/yr, indicating that the discovered shallow creep is steady-state in response to continued tectonic loading, which is supported by the analysis of surface creep time-series that yields a time-independent creep rate. The Sentinel-1 velocities also show that the Longmu Co fault, part of the commonly called Longmu-Gozha Co fault system, has no measurable motion, and therefore may be inactive. Present-day deformation within the Tianshuihai Terrane, 3.8 +/- 0.8 mm/yr E-W shear and 0.6 +/- 0.6 mm/yr N-S shortening as the GPS velocities show, is in fact accommodated by motion on the Gozha Co fault.(c) 2023 Elsevier B.V. All rights reserved.
关键词	Gozha Co fault Sentinel-1 InSAR shallow creep creeping fault
英文关键词	LONGITUDINAL VALLEY FAULT; ANGLE NORMAL-FAULT; TABAS-E-GOLSHAN; ASEISMIC SLIP; SPATIOTEMPORAL EVOLUTION; HAIYUAN FAULT; EARTHQUAKE; INSAR; SECTION; VOLCANO
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:001081117000001
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/283236
作者单位	Sun Yat Sen University; Southern Marine Science & Engineering Guangdong Laboratory; Southern Marine Science & Engineering Guangdong Laboratory (Zhuhai)
推荐引用方式 GB/T 7714	Huang, Zicheng,Zhou, Yu,Zhang, Peizhen. Newly discovered shallow creep along the Gozha Co fault in northwestern Tibet: Spatial extent, rate and temporal evolution[J],2023,621.
APA	Huang, Zicheng,Zhou, Yu,&Zhang, Peizhen.(2023).Newly discovered shallow creep along the Gozha Co fault in northwestern Tibet: Spatial extent, rate and temporal evolution.EARTH AND PLANETARY SCIENCE LETTERS,621.
MLA	Huang, Zicheng,et al."Newly discovered shallow creep along the Gozha Co fault in northwestern Tibet: Spatial extent, rate and temporal evolution".EARTH AND PLANETARY SCIENCE LETTERS 621(2023).