Effects of the grain size on the rheology of olivine
粒度对橄榄石流变性质的影响

Using the previous experimental data at high pressure and high temperature, the main parameters of rheological law for olivine were discussed. The grain size range for the rheological change were determined by the theoretical discriminant. The main rheological mechanism and the viscosity in the 150 kilometers’ depth were preliminarily discussed, and a deformation map of strain rate-stress-grain size under certain conditions was obtained.