Magma chamber of the Campi Flegrei supervolcano at the time of eruption of the Campanian Ignimbrite

A supereruption that occurred in the Campi Flegrei area, Italy, ca. 39 ka had regionaland -scale environmental impacts and deposited the Campanian Ignimbrite (CI). attempt to shed light on critical aspects of the eruption (depth of magma chamber, pre-eruptive magma conditions) and the large-volume magma plumbing system the basis of information derived from analyzing melt inclusion (MI) data. To achieve aims, we provide new measurements of homogenization temperatures and values of H2O within phenocryst-hosted MIs from pumices erupted during different phases the CI eruption. The MI data indicate that a relatively homogeneous overheated magma resided within a relatively deep magma chamber. Dissolved water contents MIs indicate that prior to the eruption the magma chamber underwent radical related to differential upward movement of magma. Decompression of the rising magma caused a decrease in water solubility and crystallization, and trachytic were emplaced at very shallow depths. The proposed eruptive model links portions the main magma chamber and apophyses with specific eruptive units.