Fig. 4: Rheology of bridgmanite–periclase aggregates.
From: Periclase deforms more slowly than bridgmanite under mantle conditions
Pressure dependent flow stress \({\widetilde{\sigma }}_{0}\) for a bridgmanite (Bdm)–periclase (Per) aggregate deformed in creep at 10−15 s−1. Calculations are performed within the POSO-SC scheme, with a volume fraction of periclase of 0.25 and a vacancy concentration in bridgmanite of Xv = 1 × 10−5. The ratio of strain rate (periclase/bridgmanite) is also indicated. Flow stresses σ0 of pure bridgmanite (in red) and pure periclase (in black) are also shown for comparison.
