Abstract
Experimental studies on rheology of mantle minerals at pressures higher than 3 GPa and at high temperature have been conducted based on recent experimental techniques in order to address the material transport in the Earth's interior. The high-pressure deformation experiments using deformation-DIA apparatus and rotational Drickamer apparatus have been carried out with in situ stress and strain measurements. The rheological data for olivine, wadsleyite, garnet and periclase at high pressure provide useful information necessary to discuss the rheological structure in the Earth's mantle. Further systematic studies are required to understand the effects of temperature, pressure, stress, chemical composition, water content and microstructure on rheology of deep Earth materials.
