气候变化领域集成服务门户(CCPortal): Diffuse Deformation in the SE Tibetan Plateau: New Insights From Geodetic Observations

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DOI	10.1029/2020JB019383
	Diffuse Deformation in the SE Tibetan Plateau: New Insights From Geodetic Observations
	Li Z.; Wang Y.; Gan W.; Fang L.; Zhou R.; Seagren E.G.; Zhang H.; Liang S.; Zhuang W.; Yang F.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	The southeastern Tibetan Plateau is a key component in the India-Eurasia collision zone, which is characterized by spatially prevalent strike-slip fault systems with devastating earthquakes. However, slip rates on some of these faults are still poorly constrained, hindering an understanding of kinematic and dynamic processes in this region. We analyze contemporary crustal deformation in the SE Tibetan Plateau based on the latest, dense geodetic observations. Slip rates on a set of dextral NW/NNW-striking faults are determined using a 3-D elastic half-space dislocation model. Our results show that boundary faults such as the Red River and Lancangjiang faults yield dextral slip rates ranging from 1 to 3 mm/a, similar to those of other small-scale sub-parallel faults such as the Chuxiong, Qujiang, and Wuliangshan faults. Additionally, sinistral slip of the Xiaojiang fault may have partly transferred to transpressional slip on the Qujiang, Jianshui, and central Red River faults, which increase seismicity on these faults. New seismic relocation results, geodetic measurements, and existing structural observations show the geometry of this dextral fault system at the depth, which may be restricted above or within the rheologically weak mid-lower crust rather than cutting into the mantle. Results confirm that the SE Tibetan Plateau is characterized by on-going diffuse deformation between the Sagaing and Xianshuihe-Xiaojiang faults. Driven by the northward advance of the eastern Himalayan syntaxis and southward crustal extrusion, distributed right-lateral movements occurred along the NW/NNW-striking fault system. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	diffuse deformation; earthquake relocation; GPS observations; southeast Tibetan Plateau; strike-slip fault systems
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/187532
作者单位	State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China; Institute of Crustal Deformation and Disaster Risk, Second Monitoring and Application Center, China Earthquake Administration, Xi'an, China; Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China; Institute of Geophysics, China Earthquake Administration, Beijing, China; School of Earth and Environmental Sciences, University of Queensland, St Lucia, QLD, Australia; Department of Earth Sciences, University of Toronto, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Li Z.,Wang Y.,Gan W.,et al. Diffuse Deformation in the SE Tibetan Plateau: New Insights From Geodetic Observations[J],2020,125(10).
APA	Li Z..,Wang Y..,Gan W..,Fang L..,Zhou R..,...&Yang F..(2020).Diffuse Deformation in the SE Tibetan Plateau: New Insights From Geodetic Observations.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Li Z.,et al."Diffuse Deformation in the SE Tibetan Plateau: New Insights From Geodetic Observations".Journal of Geophysical Research: Solid Earth 125.10(2020).