Statut | Confirmé |
Série | SEM-BESSON |
Domaines | cond-mat |
Date | Lundi 16 Septembre 2013 |
Heure | 10:30 |
Institut | IMPMC |
Salle | Salle de conférence, 3ème étage, salle 317,Tour 22-23,INSP,4,Place Jussieu |
Nom de l'orateur | Hunt |
Prenom de l'orateur | Simon |
Addresse email de l'orateur | |
Institution de l'orateur | Department of Earth Sciences, University College London |
Titre | Dynamics of D"; inferred from low-pressure MgSiO3 analogues |
Résumé | The physical properties of the post-perovskite phase of MgSiO3 have a significant effect on the dynamics of the core-mantle boundary and therefore on mantle convection in the Earth. However, the extreme pressure and temperature at under which MgSiO3 post-perovskite is stable makes measuring its thermo-mechanical properties at best extremely difficult. However, low-pressure analogue materials exist which take both the perovskite and post-perovskite structures, at conditions accessible by standard multi anvil techniques. We have made physical property measurements of these analogue materials which give insight into the physical properties of MgSiO3 post-perovskite and therefore the dynamics of mantles lower thermal boundary layer and mantle convection. |
Numéro de preprint arXiv | |
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