Figure 5.

Amount of water released into the upper mantle as a result of the dewatering process for magma oceans ranging in depth between 250 and 2800 km, excluding contributions from interstitial liquids. (a) Calculated water release including the layer corresponding to the top 1% by volume of magma ocean cumulates for initial water contents ranging between 0.001 wt% and 0.45 wt%. (b) Water release excluding the top layer for magma ocean initial water contents ranging between 0.001 wt% and 0.45 wt%. Dashed white lines at magma ocean depths of 485 km and 590 km denote boundary depths at which we employed different versions of the code for different depth intervals to exclude mineral phases that do not factor in such shallow magma oceans. Because a different upper mantle mass was used to calculate the amount of dewatering for shallow magma oceans (see text) discontinuities may be observed in the amount of water released between our results for magma ocean depths between approximately 800 km and approximately 550 km (denoted by vertical red lines). (c) Water release including the layer corresponding to the top 1% by volume of magma ocean cumulates for initial water contents ranging between 1 wt% and 5 wt%. (d) Water release excluding the top layer for magma ocean initial water contents ranging between 1 wt% and 5 wt%.