About zonality of granitic facies, of geochemistry, and of some mineralisations in the St-Sylvestre massif (Limousin-French Massif Central). The St-Sylvestre two micas granite shows a succession of facies supposedly coming from a vertical zonality: i. e. gradually changing into sillimanite and into andalousite granitic bodies, an unalbitized facies with albite-oligoclase, automorphic muscovite, rich in K, Fe, Ti, Ca, Ba, Sr, witch contains numerous potassic pegmatites, on one hand; and several albitized facies high in Si, Na, Sn, Be, Cu, and probably Rb, along with some sodolithic pegmatites and some quartz filons containing wolfram-cassiterite mineralisations. The petrographic facies and the contemporaceous mineralisations may be the product of a late superimposition to a previous geochemical background, pegmatites being an exaggerated result from local particularities of granite.