[1
]Laboratoire de Géologie; Ecole Normale Supérieure-PSL Research University-CNRS, UMR
8538; Paris France
[2
]Department of Earth Sciences; Utrecht University; Utrecht Netherlands
[3
]Laboratoire de Mécanique des Solides; UMR 7649, Ecole Polytechnique, Bat 65, Route
de Saclay; Palaiseau France