Caractérisation minérale et datation des surfaces d’altération d’Europe de l’Ouest/
Mineral characterization and dating of weathering surfaces in Western Europe
Johan YANS – UNamur, Université de Namur, Belgique
Julien BAPTISTE – BRGM, Orléans, France
We have investigated four Mn districts on the margins of the Central Massif in order to (i) identify the composition and formation process of the Mn ores and (ii) perform 40Ar/39Ar dating on K-Mn oxides (in collaboration with Geosciences-Rennes). At this stage, two deposits have a supergene zone, while the other two probably follow a mixed epithermal-supergene model.
Genetic types of the Mn deposits investigated in the project.