利用接收函数计算地壳各向异性的可靠性分析及倾斜界面的影响*

Abstract

Abstract: It is a very common technique to use receiver function to study velocity discontinuity surface between crust and upper-mantle and velocity structure.However,both anisotropy and dipping Moho can generate complicated waveforms of receiver function.We use P receiver function to determine crustal anisotropy,and then applying the signal-tonoise test and harmonic analysis to verify the reliability of the results.Using two stationsfrom Gansu province,we discuss the influence of anisotropy and dipping interface to the receiver function.It shows that the crust beneath BYT is anisotropic,while because of dipping Moho,the crustal anisotropy beneath WYT remains to be determined.In order to better understand the effect of dipping Moho to anisotropy,we use program to generate synthetic seismogram and compute the receiver function,and then make anisotropy analysis from receiver function obtained.Results show that dipping Moho will not influence the fast direction of anisotropy,but the delay time between fast and slow waves.

Key words: Crust anistropy, Receiver function, Dipping interface, Harmonic analysis

CLC Number:

P315.7

WANG Qiong, GAO Yuan, NIU Feng-lin, CHEN Yun-tai. Reliability Analysis of Crustal Anisotropy from Receiver Functions and Effect of Dipping Interface[J]. EARTHQUAKE, 2016, 36(2): 14-25.

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Reliability Analysis of Crustal Anisotropy from Receiver Functions and Effect of Dipping Interface

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