Inferences on the magmatic plumbing system at Stromboli volcano (Italy) from trace element geochemistry of matrix glasses and minerals in different types of explosive eruptions

Abstract Stromboli (Italy) is a basaltic volcano characterized by persistent, mild strombolian activity, occasionally interrupted lava effusion and more violent explosive events, named major explosions paroxysms depending on their intensity magnitude. The normal activity fed shallow degassed highly porphyritic (HP) shoshonitic basalt carrying about 50 vol.% crystals settled in glassy matrix (K 2 O > 3.8 wt.%). energetic erupt deep, volatile-rich, low-porphyritic (LP) magma with < 10 2.4 Products intermediate glass composition are also found the events. In this study, we present new data set of trace element contents glasses minerals performed products from different types that occurred at between 1998 2020. This large used to put constraints evolution architecture plumbing system, where transformation LP HP occurs. Results indicate that, compared paroxysms, matrices pumices richer incompatible elements (and K wt.%) due 15 wt.% fractionation clinopyroxene olivine. points chemical zoning deep reservoir suggests magmas residing its upper part. Among explosions, homogeneous 19 July 2020 event originate interplay mixing crystal processes. crystallization euhedral microphenocrysts An-rich plagioclase batches can pond crystallize for few days (< 11) base zone pressure coinciding entering into system 100 MPa). As relevant point understanding pre- syn-eruptive dynamics, positive correlation magnitude depth supply magma.