Abstract
We investigate the thermal evolution of a global magma ocean divided by a dunite septum into a shallow and a lower part with help of simple stability estimations and cooling time calculations. It comes out that the septum is not stable against thermal convection so that this mechanism for a separated chemical evolution of the two mantle regions does not work.
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References
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Franck, S., Riedel, M. The evolution of a global magma ocean with olivine flotation. Earth Moon Planet 54, 59–65 (1991). https://doi.org/10.1007/BF00055047
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DOI: https://doi.org/10.1007/BF00055047