The Crustal Anisotropy and Its Geodynamical Significance of the Strong Basin-Range Interaction Zone Beneath the East Margin of Qinghai-Tibetan Plateau

详细信息   

• 责任者：Sun Changqing (State Key Laboratory of Lithospheric Evolution ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 China) ; Chen Yun
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(5)
• 关键词：地壳 ; crust ; 各向异性 ; anisotropy ; 大陆动力学 ; continental dynamics ; 青藏高原 ; Qinghai-Tibetan Plateau
• 页码：p.1205-1214
• 图表：5 illus., 1 table, 37 refs.
• 分类号：0400
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

Based on the data of a dense linear array of a passive seismic experiment crossing the Longmenshan Fault in the east margin of Qinghai-Tibet Plateau, the authors measured the splitting parameters of Moho-converted Ps phases (Pms) for 147 teleseismic events recorded by 28 stations, and then analyzed the crustal anisotropy of this strong basin-range interaction zone. The results demonstrate that the crustal anisotropy of study area has significantly different characteristics in different subregions. The azimuthal variation of FPD in different blocks indicates that the crustal deformation is accommodated or controlled by the major boundary faults between the blocks.