Strength and shear instability of antigorite at high pressures

Abstract

We developed an AE monitoring system for high-pressure reaction-deformation processes combined with Deformation-DIA apparatus and synchrotron monochromatic X-ray. We applied this technique to investigate shear instability during antigorite dehydration in pure shear up to ~8 GPa and ~780°C. Almost no AEs were detected within the antigorite samples during deformation and syndeformational dehydration although localized deformation textures were observed in recovered samples.