No abstract

Magmatic systems are susceptible to changes in their equilibrium state through mass and energy exchange.The implication of open-system behavior manifests in changes in rheologic properties of the magma, affecting magma ascent and eruption style (Cassidy et al., 2018;Métrich et al., 2010;Ruprecht & Bachmann, 2010). The perturbation away from chemical equilibrium during the course of magma evolution is most pronounced during syn-eruptive ascent, where rapid changes in dissolved volatiles have large effects on the equilibrium phase assemblage (