Study of microstructures and physical properties of partial molten peridotite under differential stress

为了测定部分熔融橄榄岩的物理性质，对具有变形功能的dia型多vil压机操作系统进行了改造。我们比较了部分熔融橄榄岩在静水和剪切应力条件下的电导率。初步结果表明，平行于剪切方向的电导率比垂直于剪切方向的电导率高一个数量级。这一结果与软流层顶部的电导率各向异性相一致，表明在该深度存在部分熔融带。

In order to determine physical properties of partially molten peridotite, we renewed operation system of a DIA-type mutianvil press with deformation finction. We compared electrical conductivities of the partial molten peridotites under hydrostatic and shear stress conditions. Preliminary result suggested that the conductivity parallel to shear direction is one order of magnitude higher than that normal to the shear direction. This result is consistent with the conductivity anisotropy observed at top of the asthenosphere and suggests a presence of partial molten zone at that depth.