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Buoyancy of slabs and plumes enhanced by curved post-garnet phase boundary - Nature Geoscience
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Mantle convection manifests in the subduction of cold slabs and the upwelling of hot plumes, driving both near-surface processes such as volcanism and seismicity and the chemical evolution of the Earth's interior. Phase transitions of mantle minerals at high pressure are associated with changes in density and viscosity. Mantle convection is either enhanced or impeded depending on the sign of the slope of the phase transition boundary (the temperature dependence of transition pressures).
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