Figure 3. Stress evolution and acoustic activity as a function of strain and temperature.

Average differential stress in olivine as a function of strain, calculated from synchrotron X-ray diffraction patterns, for experiments at 1.1±0.2 GPa (a) and 3.5±0.1 GPa (b) along with temperature evolution. Associated cumulative acoustic emissions are shown in c,d. Temperature limits for onsets of reactions (4) (23) and (5) (ref. ⁴⁷) respectively relate to antigorite destabilization.