Articles | Volume 16, issue 4/5
https://doi.org/10.5194/se-16-297-2025
https://doi.org/10.5194/se-16-297-2025
Research article
 | 
14 May 2025
Research article |  | 14 May 2025

On the global geodynamic consequences of different phase boundary morphologies

Gwynfor T. Morgan, J. Huw Davies, Robert Myhill, and James Panton

Data sets

On the global geodynamic consequences of different phase boundary morphologies: Mantle Convection and Circulation Model outputs G. T. Morgan et al. https://doi.org/10.5281/zenodo.15052985

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Short summary
Phase transitions can influence mantle convection, inhibiting or promoting vertical flow. We are motivated by two examples: the post-spinel reaction proceeding via akimotoite at cool temperatures and a curving post-garnet boundary. Some have suggested these could change mantle dynamics. We find this is unlikely for both reactions: the first due to the uniqueness of thermodynamic state and the second due to the low magnitude of the boundary’s  slope in pressure–temperature space and density change.
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