摘要
<正>GPS观测结果[Gan et al.,2007]显示,由于受到北向运动的印度板块的挤压和坚硬四川盆地的阻挡,青藏高原地壳物质由东向逃逸转为东南向逃逸。目前普遍认为,坚硬的四川盆地和青藏高原逃逸的地壳物质间的相互作用对龙门山陡峭地形的形成起到了重要作用[Zhang et al.,2010]。但是GPS的观测只能提供浅部变形信息。对于青藏高原的快速抬升,上地幔是否起了作用,它具有怎样的变性特征,GPS观测无法提供有效约束。一种观点[Zhang et al.,2010]认为,地壳流和四川盆地的相互作用除了使
引文
Chang,L.,C.Wang,and Z.Ding(2008),Seismic anisotropy of upper mantle in Sichuan and adjacent regions,Science in China Series D:Earth Sciences,51(12),1683-1693,doi:10.1007/s11430-008-0147-8.
Gan,W.,P.Zhang,Z.-K.Shen,Z.Niu,M.Wang,Y.Wan,D.Zhou,and J.Cheng(2007),Present-day crustal motion within the Tibetan Plateau inferred from GPS measurements,Journal of Geophysical Research,112(B8),doi:10.1029/2005jb004120.
Li,Y.,Q.Wu,F.Zhang,Q.Feng,and R.Zhang(2011),Seismic anisotropy of the Northeastern Tibetan Plateau from shear wave splitting analysis,Earth and Planetary Science Letters,304(1-2),147-157,doi:10.1016/j.epsl.2011.01.026.
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Zhang,Z.,X.Yuan,Y.Chen,X.Tian,R.Kind,X.Li,and J.Teng(2010),Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin,Earth and Planetary Science Letters,292(3-4),254-264,doi:10.1016/j.epsl.2010.01.046.