Thèse de Dongyang Huang | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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Cosmochimie, astrophysique et géophysique expérimentale

  Thèse de Dongyang Huang

Experimental and Theoretical Investigation of Core-Mantle Interactions
Encadrant (et co-encadrant) : 
Résumé: 

Chemical reactions at the core-mantle boundary are traditionally considered fairly limited because they involve reactions between solids and liquids, however, these interactions could be a major source of chemical evolution of the mantle if liquid is present at the base of the mantle - or has been for a significant period time - as postulated in the basal magma ocean hypothesis. We aim to provide experimental constraints on the equilibria between liquid silicate / metal at the bottom of the magma ocean and to integrate them into models of the formation, differentiation and evolution of Earth's mantle. Experiments will be performed sharing siderophile elements between molten metal and molten silicate at CMB conditions, and the composition of a ''CMB'’ component will be modeled and incorporated in the evolution of the early Earth.