气候变化领域集成服务门户(CCPortal): Three-dimensional mechanical modeling of large-scale crustal deformation in China constrained by the GPS velocity field

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DOI	10.1016/j.tecto.2007.11.006
	Three-dimensional mechanical modeling of large-scale crustal deformation in China constrained by the GPS velocity field
	Wang, Jian; Ye, Zheng-Ren; He, Han-Kun
通讯作者	Wang, J (通讯作者)
发表日期	2008
ISSN	0040-1951
EISSN	1879-3266
起始页码	51
结束页码	60
卷号	446 期号:1-4
英文摘要	We present a quantitative model for the crustal movement in China with respect to the Eurasia plate by using the three-dimensional finite element code ADELI The model consists of an elastoplastic upper lithosphere and a viscoelastic lower lithosphere. The lithosphere is supported by the hydrostatic pressure at its base. The India-Eurasia collision is modeled as a velocity boundary condition. Ten large-scale faults are introduced as Coulomb-type frictional zones in the modeling. The values for the root mean square (RMS) of the east and north velocity components differences (RMS(Ue) and RMS(Un)), which are between the observation and the prediction, are regarded as the measurements to evaluate our simulations. We model the long-term crustal deformation in China by adjusting the faults frictions ranged from 0.01 to 0.5 and considering the effects resulted from lithospheric viscosity variation and topographic loading. Our results suggest most of the large-scale faults frictions are not larger than 0.1, which is consistent with other large-scale faults such as the North Anatolian fault (Provost, A.S., Chery, J., Hassani, R., 2003. Three-dimensional mechanical modeling of the GPS velocity field along the North Anatolian fault. Earth Planet. Sci. Lett. 209, 361-377) and the San Andreas fault (Mount, VS., Suppe, J., 1987. State of stress near the San Andreas fault: implications for wrench tectonics. Geology, 15, 1143-1146). Further, we examine the effects on the long-term crustal deformation in China of three causes: the large-scale faults, lithospheric viscosity structure and topographic loading. Results indicate that the lithospheric viscosity structure and the topographic loading have important influences on the crustal deformation in China, while the influences caused by the large-scale faults are small. Although our simulations satisfactorily reproduce the general picture of crustal movement in China, there is a poor agreement between the model and the observed GPS velocity field in Sichuan-Yunnan area. It may result from our simple models such as that the faults are all vertical from model surface to bottom and that the effects caused by the subduction of Burma slab are neglected. (c) 2007 Elsevier B.V. All rights reserved.
关键词	LITHOSPHERIC STRESS-FIELD PRESENT-DAY KINEMATICS INDIA-ASIA COLLISION FAULT CONVERGENT TECTONICS MANTLE AREA FLOW
英文关键词	crustal deformation; fault friction; topographic loading; lithospheric viscosity structure
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000252696600005
来源期刊	TECTONOPHYSICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257530
推荐引用方式 GB/T 7714	Wang, Jian,Ye, Zheng-Ren,He, Han-Kun. Three-dimensional mechanical modeling of large-scale crustal deformation in China constrained by the GPS velocity field[J]. 中国科学院青藏高原研究所,2008,446(1-4).
APA	Wang, Jian,Ye, Zheng-Ren,&He, Han-Kun.(2008).Three-dimensional mechanical modeling of large-scale crustal deformation in China constrained by the GPS velocity field.TECTONOPHYSICS,446(1-4).
MLA	Wang, Jian,et al."Three-dimensional mechanical modeling of large-scale crustal deformation in China constrained by the GPS velocity field".TECTONOPHYSICS 446.1-4(2008).