Fig. 4: Ferric iron concentration in bridgmanite under hydrous lower mantle conditions.
From: Pressure stabilizes ferrous iron in bridgmanite under hydrous deep lower mantle conditions
The blue solid circles represent the Fe3+/ΣFe ratios measured in recovered crystalline bridgmanite samples over the pressure range of 90-130 GPa. The light blue curve is a guide to the eye for the Fe3+/ΣFe ratio of bridgmanite. The dash line indicates the corresponding depth (~2300 km) where the Fe3+/ΣFe ratio falls below 0.2.
