[1] Univ Nantes, Lab Planetol & Geodynam Nantes, CNRS, UMR 6112, F-44322 Nantes, France
[2] Univ Lyon 1, CNRS, UMR 5125, PEPS, F-69622 Villeurbanne, France
[3] Inst Univ France, F-75005 Paris, France
[4] Univ Montpellier 2, CNRS, UMR 5554, Inst Sci Evolut, F-34095 Montpellier, France