1. CNRS; University of Franche Comté; UMR ThéMA; Besançon France
2. CNRS; University of Franche Comté; UMR FEMTO-ST; Besançon France
3. University of Paris-Sud 11; UMR GEOPS; Orsay France
4. Arctic Geology Department; The University Centre in Svalbard; UNIS; Norway