On the role of solute drag in reconciling laboratory and natural constraints on olivine grain growth kinetics
Résumé
SUMMARY We investigate the effect of solute drag on the grain growth (GG) kinetics in olivine-rich rocks through full field and mean field modelling. Considering a drag force exerted by impurities on grain boundary migration allows reconciling laboratory and natural constraints on olivine GG kinetics. Solute drag is implemented in a full field level-set framework and in a mean field model that explicitly accounts for a grain size distribution. After calibration of the mean field model on full field results, both models are able to both reproduce laboratory GG kinetics and predict grain sizes consistent with observations in peridotite xenoliths from different geological contexts.
Domaines
Planète et Univers [physics] Sciences de la Terre Planète et Univers [physics] Sciences de la Terre Géophysique [physics.geo-ph] Planète et Univers [physics] Sciences de la Terre Tectonique Sciences de l'ingénieur [physics] Matériaux Informatique [cs] Modélisation et simulation Physique [physics] Matière Condensée [cond-mat] Science des matériaux [cond-mat.mtrl-sci]
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