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Jeudi 11 février
Résumé :
I will present a general perspective of deep-Earth and deep planetary research ;
I will show geophysical evidence for a core constituted of Fe-Ni alloyed with
a certain quantity of lighter elements. I will then show how our elasticity
measurements under high P and T bring good evidence that the light ele-
ment in Earth’s inner core is silicon. I will then show how modelling recent
metal-silicate thermodynamic phase equilibria provide evidence that the light
elements in the outer core are mainly oxygen and silicon. I will -nally show
that due to the spin transition of iron in Earths lowermost mantle, the core
and mantle are in (or very close to) chemical equilibrium at the present day.
RECRUTEMENT ACCES DIRECT
Le département de physique
Fête de la Science 2018 