气候变化领域集成服务门户(CCPortal): Three-Dimensional Crustal Structures of the Shanxi Rift Constructed by Rayleigh Wave Dispersion Curves and Ellipticity: Implication for Sedimentation, Intraplate Volcanism, and Seismicity

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DOI	10.1029/2020JB020146
	Three-Dimensional Crustal Structures of the Shanxi Rift Constructed by Rayleigh Wave Dispersion Curves and Ellipticity: Implication for Sedimentation, Intraplate Volcanism, and Seismicity
	Xu H.; Luo Y.; Yang Y.; Shen W.; Yin X.; Chen G.; Yang X.; Sun S.
发表日期	2020
ISSN	21699313
卷号	125 期号:11
英文摘要	The Shanxi Rift is one of the world's largest Cenozoic continental rifts. It is one of the most earthquake prone areas in China and has volcanic activities characterized by small volumes of magma. In order to study continental rifting mechanism, intraplate volcanism, and seismicity of the Shanxi Rift, we construct a high-resolution 3-D lithospheric shear velocity (Vs) model with a focus of the crust by jointly inverting Rayleigh wave dispersion curves and ellipticity measurements. Compared with published models, our 3-D Vs model has improved the resolution for shallow structures. Our model reveals several significant velocity features. (1) The sedimentary layer of the Datong Basin is much thicker than those in the southern Shanxi Rift, implying that the sedimentation rate of the Datong Basin is higher, which could be attributed in part to asthenosphere upwelling beneath the Datong Basin area in the past few Ma in addition to passive rifting. (2) A low-velocity body is observed in the middle crust beneath the Datong Volcanoes, suggesting the presence of a small amount of partial melting in the middle crust. (3) Lower velocities in the middle and lower crust beneath the Datong Basin are coincident with the shallowing of deep earthquakes from the southern to northern Shanxi Rift in the crust, suggesting that higher temperature may elevate the brittle-to-ductile transition zone, leading to the shallowing of focal depths of earthquakes in the Shanxi Rift from south to north. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	ambient noise tomography; dispersion curves and ellipticity; Shanxi Rift
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/187510
作者单位	Hubei Subsurface Multi-scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; State Key Laboratory of Geological Processes and Mineral Resources, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; ARC Centre of Excellence for Core to Crust Fluid Systems, Department of Earth and Environmental Sciences, Macquarie University, Sydney, NSW, Australia; Department of Geosciences, State University of New York at Stony Brook, Stony Brook, NY, United States; China Earthquake Administration, Institute of Earthquake Forecasting, Beijing, China; The School of Exploration Technology and Engineering, Hebei GEO University, Shijiazhuang, China
推荐引用方式 GB/T 7714	Xu H.,Luo Y.,Yang Y.,et al. Three-Dimensional Crustal Structures of the Shanxi Rift Constructed by Rayleigh Wave Dispersion Curves and Ellipticity: Implication for Sedimentation, Intraplate Volcanism, and Seismicity[J],2020,125(11).
APA	Xu H..,Luo Y..,Yang Y..,Shen W..,Yin X..,...&Sun S..(2020).Three-Dimensional Crustal Structures of the Shanxi Rift Constructed by Rayleigh Wave Dispersion Curves and Ellipticity: Implication for Sedimentation, Intraplate Volcanism, and Seismicity.Journal of Geophysical Research: Solid Earth,125(11).
MLA	Xu H.,et al."Three-Dimensional Crustal Structures of the Shanxi Rift Constructed by Rayleigh Wave Dispersion Curves and Ellipticity: Implication for Sedimentation, Intraplate Volcanism, and Seismicity".Journal of Geophysical Research: Solid Earth 125.11(2020).