Extended Data Fig. 11: Deformation mechanism maps of bridgmanite at 25 GPa/1,900 K (a,c) and 25 GPa/2,500 K (b,d) respectively.
From: The potential for bridgmanite megacrysts to drive magma ocean segregation
The coloured contours represent the strain rate (s−1) and viscosity (Pa s) in (a, b) and (c, d), respectively. Solid lines distinguish regimes with dominant deformation mechanisms of dislocation creep and diffusion creep. The green (magenta) vertical bars represent the grain size of the shallow lower mantle in the WMO (lowermost mantle in the BMO) and the likely stresses of the mantle convection cores. Parameters used to construct these figures are tabulated in Extended Data Table 1.
