气候变化领域集成服务门户(CCPortal): Crustal ductile flow and its contribution to tectonic stress in Southwest China

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DOI	10.1016/j.tecto.2009.04.001
	Crustal ductile flow and its contribution to tectonic stress in Southwest China
	Huang, Runqiu; Wang, Zhi; Pei, Shunping; Wang, Yunsheng
通讯作者	Wang, Z (通讯作者)
发表日期	2009
ISSN	0040-1951
EISSN	1879-3266
起始页码	476
结束页码	489
卷号	473 期号:3-4
英文摘要	Knowledge of tectonic crustal stress in highland region can provide important insights into relative plate motion, mountain building and genesis of larger crustal earthquakes underneath tectonically active regions. Here we focus on the highland regions in Southwest (SW) China, including southeast Tibet and Sichuan and Yunnan provinces. To better understand the correlation between crustal stress and structural heterogeneities, three-dimensional (3-D) velocity (Vp, Vs) structures in the crust are imaged using a large number of P- and Pn-wave, and S- and Sn-wave arrival times simultaneously. A slow-velocity layer at depths of 16-26 km was clearly imaged in most regions of SW China, suggesting the presence of a ductile layer that may be associated with partial melting and/or aqueous fluids in the crust. The azimuths of the maximum compressional stresses estimated using 147 high-quality stress data revealed a characteristic regional stress field along the fault belts in the study region. The trajectories of the stress axes along the southeastern Tibetan plateau vary from NE-SW in southwest Tibet to E-W in southeast Tibet. Our study indicates that, apart from the influence from the collision between the Indian and Eurasian plates, the present-day crustal stress field along the tectonic zones in SW China is significantly affected by ductile deformation in the crust, suggesting that crustal structural heterogeneity plays an important role in the tectonic stress. (c) 2009 Elsevier B.V. All rights reserved.
关键词	3-DIMENSIONAL VELOCITY STRUCTURE UPPER-MANTLE SOURCE AREA EARTHQUAKE FLUIDS TIBET LITHOSPHERE TOMOGRAPHY TOPOGRAPHY DYNAMICS
英文关键词	Crustal stress; Crustal ductile flow; Structural inhomogeneity; Seismic tomography
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000269287000015
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/257680
推荐引用方式 GB/T 7714	Huang, Runqiu,Wang, Zhi,Pei, Shunping,et al. Crustal ductile flow and its contribution to tectonic stress in Southwest China[J]. 中国科学院青藏高原研究所,2009,473(3-4).
APA	Huang, Runqiu,Wang, Zhi,Pei, Shunping,&Wang, Yunsheng.(2009).Crustal ductile flow and its contribution to tectonic stress in Southwest China.TECTONOPHYSICS,473(3-4).
MLA	Huang, Runqiu,et al."Crustal ductile flow and its contribution to tectonic stress in Southwest China".TECTONOPHYSICS 473.3-4(2009).