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

Apr 8, 2013 Baptiste Journaux is in Lille this week General

Baptiste Journaux (ENS Lyon) is a visiting scientist with us this week (8-12 april). His interests are on the mineralogy of ice at high pressure with implications on the interiors of icy bodies (icy satellites or ocean exoplanets).

Within this project he performs the first modeling of dislocation in ice X

Ice X is a singular solid H2O phase as it have a ionic crystalographic structure, unlike the other form of H2O ice which are molecular solids. Its stability field over 100GPa is far beyound present day exeprimental ability, so its rheological properties can only be estimated with the help of theorical calculations. Ice X is believed to be found at depth within ice giant like Uranus or Neptune and in the ice mantle of the recently discovered ocean exo-planets (Sotin and Grasset, 2007; Fu et al., 2010). Modeling the rheological properties of their constituent materials, like ice X, will help astrophisicists and planetary scientists to understand the dynamics and the thermal evolution of such planetary bodies, which ocean are potentially suitable for the development of an exo-life (Lammer et al., 2009).

​Fu, R., O’Connell, R. J., Sasselov, D. D., 2010. The Interior Dynamics of Water Planets. The Astrophysical Journal 708, 1326–1334.

Lammer, H., et al., 2009. What makes a planet habitable? Astronomy and Astrophysics Review 17, 181–249.

Sotin, C., Grasset, O., 2007. Mass-radius curve for extrasolar Earth-like planets and ocean planets. Icarus 191, 337–351.

 

Ice 10