1. U. R. Argiles, Géochimie et Environnements, Department of Geology, University of Liège, Belgium
2. Department of Geography, University of Liège, Belgium
3. Department of Geological Engineering, Eskisehir Osmangazi University, Turkey
4. Pétrologie, Géochimie et Pétrophysique, Department of Geology, University of Liège, Belgium
5. Département des Sciences et Gestion de l’Environnement, University of Liège, Belgium
6. Department of Earth Sciences, Royal Museum for Central Africa, Belgium
7. CNRS, EPOC, UMR5805, Université de Bordeaux, France