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Plate tectonics and mantle controls on plume dynamics

Abstract : Mantle plumes provide valuable information about whole Earth convection: they originate at the core-mantle boundary, cross Earth's mantle and interact with the lithosphere. For instance, it has been proposed that the mobility/stability of plumes depends on plume intrinsic properties, on how slabs interact with the basal boundary layer, on mantle flow, or on their proximity to mid-ocean ridges. Here, we use 3D-spherical models of mantle convection generating selfconsistent plate-like behaviour to investigate the mechanisms linking tectonics and mantle convection to plume dynamics. Our models produce fullydynamic mantle plumes that rise vertically with deflection < 10 • and present excess temperatures, rising speeds, buoyancy and heat fluxes comparable to
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https://hal.archives-ouvertes.fr/hal-03228588
Contributor : Nicolas Coltice Connect in order to contact the contributor
Submitted on : Tuesday, May 18, 2021 - 11:44:44 AM
Last modification on : Thursday, March 17, 2022 - 10:08:42 AM

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Maëlis Arnould, Nicolas Coltice, Nicolas Flament, Claire Mallard. Plate tectonics and mantle controls on plume dynamics. Earth and Planetary Science Letters, Elsevier, 2020, 547, pp.116439. ⟨10.1016/j.epsl.2020.116439⟩. ⟨hal-03228588⟩

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