几种弱各向异性介质中qP波速度与偏振异常分析

Velocity and polarization anomaly for qP wave in several weak anisotropic media

1. 中国科学院地质与地球物理研究所,北京100101;2. 中国新星石油公司,北京100083;3. 中国新星石油公司南京石油物探研究所,南京210014

Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101

本文介绍了在具有垂直对称轴的横向各向同性介质 (TIV介质)中导出的偏振和相速度近似关系,并由这些关系计算了地球内部几种各向异性岩石中地震波速各向异性因子、偏振信息及其与传播方向之间的偏差。最后,我们以图形对计算结果进行了讨论。

The approximation relationship of polarization and phase velocity in transversely isotropic media with vertical axis of symmetry are presented. With these relationships,the anisotropic factor, polarization vector, and the deviation of polarization from the propagating direction of seismic qP wave are calculated for several anisotropic rocks in the earth. At last, we make some analyses of the calculated results with several graphs.