1. UGCT-PProGRess, Department of Geology, Faculty of Sciences, Ghent University, Krijgslaan 281/S8, 9000 Ghent, Belgium
2. XRE NV, Bollebergen 2B bus 1, 9052 Ghent, Belgium
3. Department of Arctic Geology, University Centre in Svalbard, P.O. Box 156, 9171 Longyearbyen, Norway