Résumé
This new structural map of the Cevennes area shows below the stack of micaschist nappes the presence of a gneiss window which cannot be correlated to the lower gneiss nappe of the Massif Central. In the northern part, the S-SW verging deformations are reworked by an anatexis which is older than the Cevennes plutonism and the Velay migmatites. The granodiorites emplaced around 315 Ma during the postcollision thinning are the driving power of hydrothermal convective flows responsible for the formation of gold bearing quartz veins.