1. Laboratoire de géologie de Lyon: Terre, Planètes, Environnements; Université Lyon 1/Ecole Normale Supérieure de Lyon/CNRS, UMR 5276; Villeurbanne France
2. Institute for Dynamics of Geospheres; Moscow Russia
3. Planetary Science Institute; Tucson Arizona USA
4. Centre for Earth Evolution and Dynamics, Department for Geosciences; University of Oslo; Oslo Norway