气候变化领域集成服务门户(CCPortal): Present-Day Crustal Deformation of Continental China Derived From GPS and Its Tectonic Implications

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DOI	10.1029/2019JB018774
	Present-Day Crustal Deformation of Continental China Derived From GPS and Its Tectonic Implications
	Wang M.; Shen Z.-K.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	We process rigorously GPS data observed during the past 25 years from continental China to derive site secular velocities. Analysis of the velocity solution leads to the following results. (a) The deformation field inside the Tibetan plateau and Tien Shan is predominantly continuous, and large deformation gradients only exist perpendicular to the Indo-Eurasian relative plate motion and are associated with a few large strike-slip faults. (b) Lateral extrusions occur on both the east and west sides of the plateau. The westward extrusion peaks at ~6 mm/yr in the Pamir-Hindu Kush region. A bell-shaped eastward extrusion involves most of the plateau at a maximum rate of ~20 mm/yr between the Jiali and Ganzi-Yushu faults, and the pattern is consistent with gravitational flow in southern and southeastern Tibet where the crust shows widespread dilatation at 10–20 nanostrain/yr. (c) The southeast borderland of Tibet rotates clockwise around the eastern Himalaya syntaxis, with sinistral and dextral shear motions along faults at the outer and inner flanks of the rotation terrane. The result suggests gravitational flow accomplished through rotation and translation of smaller subblocks in the upper crust. (d) Outside of the Tibetan plateau and Tien Shan, deformation field is block-like. However, unnegligible internal deformation on the order of a couple of nanostrain/yr is found for all blocks. The North China block, under a unique tectonic loading environment, deforms and rotates at rates significantly higher than its northern and southern neighboring blocks, attesting its higher seismicity rate and earthquake hazard potential than its neighbors. © 2020. The Authors.
英文关键词	continental China; crustal deformation; earthquake; GPS; tectonics; velocity
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/187998
作者单位	State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China; Department of Geophysics, School of Earth and Space Science, Peking University, Beijing, China; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Wang M.,Shen Z.-K.. Present-Day Crustal Deformation of Continental China Derived From GPS and Its Tectonic Implications[J],2020,125(2).
APA	Wang M.,&Shen Z.-K..(2020).Present-Day Crustal Deformation of Continental China Derived From GPS and Its Tectonic Implications.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Wang M.,et al."Present-Day Crustal Deformation of Continental China Derived From GPS and Its Tectonic Implications".Journal of Geophysical Research: Solid Earth 125.2(2020).