La transition augite-diopside et les liquides silicatés intra-cristallins dans les pyroclastes de l’activité actuelle du Stromboli: témoignages de la réinjection et du mélange magmatiques

Refilling of undifferentiated magma at high temperature in the shallow chamber of Stromboli volcano induces both partial gas release of the crystallizing shoshonic liquid and a beginning of melting of salite-augite megacrysts in equilibrium with the liquid. In the new magma, crystallization of pyroxenes resumes with a chrome-diopside composition. The study of silicate melts inclusions in pyroxenes reveals the importance of refilling processes in the evolution products stored in the magma reservoir.