U-Pb geochronology and microtectonics of the pre-Stephanian metamorphic series of Aubrac and of the Marvejols region (Massif Central)

15 new datings, by U-Pb on zircon, using the Wetherill Concordia diagram, were performed on tectonically superposed units of the French Massif Central basement. 10 results were considered as geologically interpretable.