Fluid and melt inclusions in sub-volcanic environments from volcanic systems: Examples from the Neapolitan area and Pontine Islands, Italy

摘要: The study of fluid (FI) and melt inclusions (MI) can be a powerful tool for understanding generation, crystallization, mixing histories magmas the conditions magma evolution during their ascent to surface. FI MI data from alkali syenite xenoliths different subvolcanic igneous systems in Neapolitan volcanic area (Vesuvius, Campi Flegrei, Ponza Ventotene) Italy provide valuable information on nature phases trapped late evolutionary stages these alkaline magmatic systems. They also document liquid immiscibility at pre-eruptive furnish evidence that high salinity fluids (brines) exsolve directly upper part chambers magmatic/hydrothermal transition play critical roles ore metal transport. Magma chamber margins are particular significance because may record various processes crystallization system. complex daughter crystal assemblages seen silicate + CO2 H2O melt, hypersaline or S-rich aqueous found some samples solute contents fluid(s) entrapment direct source metals. latter could considerable interest interpretation genesis, demonstrate linkage with low sulfidation epithermal deposits porphyry In addition, used address problem frequent ground movements (bradyseism) interpreted as representing modern analog behaving physically like