论述了一个不常见的、明显的过渡带(TZ)各向异性的实例,证据来自于许多比垂直偏振剪切波(SV)早到3s的水平偏振剪切波(SH)。各向异性区与远离活动俯冲带及已知的纵、横波速度横向非均匀体边界的深震相关。我们把这一各向异性区解释为与岩石层残骸中的巨大岩石异常体有关的强组构,这个巨大的岩石异常体悬浮并滞留于过渡带中。冷板块的快速俯冲非常适合于这种组构的形成,因此板块穿透到下地幔并不能普遍发生。 An unusual and obvious example of TZ anisotropy is discussed, evidenced by many horizontally polarized shear waves (SHs) that are 3 s earlier than vertically polarized shear waves (SVs). The anisotropy zone is associated with deep earthquakes away from the active subduction zone and the known lateral inhomogeneities of longitudinal and shear-wave velocities. We interpret this anisotropy zone as a strong formation associated with a large anomaly of rock in the remnant of the rock mass, an unusually massive body of rock that resides in the transitional zone. Rapid subduction of cold plate is very suitable for the formation of this structure, so plate penetration into the lower mantle and can not be universal.