Detecting seismic anisotropy above the 410?km discontinuity using reflection coefficients of underside reflections

摘要

Highlights?Development of a diagnostic tool to test anisotropy with reflected waves.?Modelling of reflection coefficients for anisotropic olivine layer at 410?km.?Different behaviours of P and S wave reflection coefficients at boundary.?SH polarity is an important parameter.?It is possible to discriminate between different deformation styles.AbstractWe investigate the effect of various types of deformation mechanisms on the reflection coefficients of P and S waves underside reflections off the 410?km discontinuity, to develop a diagnostic tool to detect the style of deformation at boundary layers. We calculate the reflection coefficient for P and SH underside reflections using velocity perturbations resulting from aligned minerals above the 410?km discontinuity for different deformation scenarios. The results show