Science. 1994 Jan 14;263(5144):212-5. doi: 10.1126/science.263.5144.212.
Data from two microseismic field experiments in northern Chile revealed an elongated cluster of earthquakes in the subducted Nazca plate at a depth of about 100 kilometers in which down-dip tensional events were consistently shallower than a family of compressional earthquakes. This double seismic zone shows a distribution of stresses of opposite polarity relative to that observed in other double seismic zones in the world. The distribution of stresses in northern Chile supports the notion that at depths of between 90 to 150 kilometers, the basalt to eclogite transformation of the subducting oceanic crust induces tensional deformation in the upper part of the subducted slab and compressional deformation in the underlying mantle.
两段来自智利北部的微震野外实验的数据显示，俯冲的纳斯卡板块在约 100 公里深处存在一个狭长的地震群，其中顺倾方向的张性事件始终比一组压性地震浅。这个双震带显示出的应力分布与世界上其他双震带观察到的相反。智利北部的应力分布支持了这样一种观点，即在 90 至 150 公里的深度范围内，俯冲洋壳的玄武岩到榴辉岩转变导致俯冲板块上部发生张性变形，而下部地幔则发生压性变形。
