Etude geologique de la partie centrale du massif granitique de Gueret (Creuse, Massif Central francais)

Abstract

Abstract The crystalline rocks of the Gueret plateau in the Central Massif of France consist essentially of the so-called Gueret granite and anatexites known as the Aubusson gneiss. The granite exhibits both intrusive and anatectic features. A detailed petrographic study indicates close relationships between the granite and the gneiss and, together with lead-alpha age determinations on zircon, supports the conclusion that the Gueret granite represents a local late-stage product of the Aubusson gneiss formed during remobilization of the migmatitic basement.</jats:p