Géochimie et géochronologie U/PB du pluton granitique de Neuvy-Bouin (Haut-Bocage vendéen) : un exemple de corps plutonique polyphasé

New geological, structural and geochemical data show the presence of at least four magnetic units in the Neury-Bouin massif. U/Pb zircon age (340±4 Ma) obtained on the Largeasse granites indicates that in the Neury-Bouin pluton the magmatic activity began during Visean times. The emplacement of the Largeasse granites is followed by the aluminopotassic two-mica granites of Pougne-Herisson and by two mica leucogranites. The small high-K calc-alkaline granite body discovered in the Neury-Bouin pluton represents the first occurrence of this type of magmatism in the area