Crustal anisotropy and ductile flow beneath the eastern Tibetan Plateau and adjacent areas

doi:10.1016/j.epsl.2016.03.003

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Crustal anisotropy and ductile flow beneath the eastern Tibetan Plateau and adjacent areas
	Kong, Fansheng 1; Wu, Jing 2; Liu, Kelly H.1; Gao, Stephen S.1
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2016-05-15
卷号	442 页码:72-79
关键词	Seismic Anisotropy Crustal Flow Tibetan Plateau Receiver Functions
DOI	10.1016/j.epsl.2016.03.003
文献子类	Article
英文摘要	Crustal anisotropy beneath 71 broadband seismic stations situated at the eastern Tibetan Plateau and the Sichuan Basin is investigated based on the sinusoidal moveout of P-to-S conversions from the Moho and an intra-crustal discontinuity. Significant crustal anisotropy is pervasively detected beneath the study area with an average splitting time of 0.39 +/- 0.18 s. The resulting fast orientations are mostly parallel to the major shear zones in the Songpan-Ganzi Terrane, and can be explained by fluid-filled fractures, favoring the model of rigid block motion with deformations concentrated on the block boundaries. In the vicinity of the Xianshuihe-Xiaojiang Fault Zone in the southern Songpan-Ganzi Terrane, our results, when combined with previously revealed high crustal Poisson's ratio in the area, support the existence of mid/lower crustal flow. The Longmenshan Fault Zone and adjacent areas are dominated by strike-orthogonal fast orientations, which are consistent with alignments of cracks associated with compressional stress between the Plateau and the Sichuan Basin. The observations suggest that crustal thickening is the main cause of the high topographic relief across the Longmenshan Fault Zone. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	RECEIVER FUNCTION DATA ; SEISMIC ANISOTROPY ; PREFERRED ORIENTATION ; SPLITTING ANALYSIS ; HIGH TOPOGRAPHY ; SIMPLE SHEAR ; DEFORMATION ; EARTHQUAKE ; ASIA ; LONGMENSHAN
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000375348700008
资助机构	United States National Science Foundation(EAR-0911346) ; United States National Science Foundation(EAR-0911346) ; Natural Science Foundation of China(41374064 ; Natural Science Foundation of China(41374064 ; 41574055) ; 41574055) ; United States National Science Foundation(EAR-0911346) ; United States National Science Foundation(EAR-0911346) ; Natural Science Foundation of China(41374064 ; Natural Science Foundation of China(41374064 ; 41574055) ; 41574055)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53481]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Kong, Fansheng,Wu, Jing,Liu, Kelly H.,et al. Crustal anisotropy and ductile flow beneath the eastern Tibetan Plateau and adjacent areas[J]. EARTH AND PLANETARY SCIENCE LETTERS,2016,442:72-79.
APA	Kong, Fansheng,Wu, Jing,Liu, Kelly H.,&Gao, Stephen S..(2016).Crustal anisotropy and ductile flow beneath the eastern Tibetan Plateau and adjacent areas.EARTH AND PLANETARY SCIENCE LETTERS,442,72-79.
MLA	Kong, Fansheng,et al."Crustal anisotropy and ductile flow beneath the eastern Tibetan Plateau and adjacent areas".EARTH AND PLANETARY SCIENCE LETTERS 442(2016):72-79.