RheoMan: a five-year, ERC-funded (Advanced Grant), project to model the rheology of the Earth's mantle

Oct 6, 2016 New publication in Scientific Reports Results

 

Couverture

 

Scientific Reports publishes today the last results from the PhD of A.M. Goryaeva modeling the surprising behavior of dislocation in MgSiO3 post-perovskite In the conditions of the D" layer.

 

 

 

It is possible with atomic scale modeling to predict the mechanical properties of post-perovskite, a ultra-high pressure phase which is only stable at the core-mantle boundary. The very peculiar layered structure of this mineral allows dislocation to glide very easily, without lattice friction, in contrast to what is observed in other mantle silicates. The D" layer which is a very important thermal boundary layer can be easily deformed. Our calculations predict that dislocations in post-perovskite must be a source of attenuation of seismic waves.

 

 

 

The press release of the University of Lille

The news of CNRS-INSU

 

A.M. Goryaeva, Ph. Carrez & P. Cordier (2016) Low viscosity and high attenuation in MgSiO3 post-perovskite inferred from atomic-scale calculations. Scientific Reports, 6, 34771; doi: 10.1038/srep34771