Figure 4
From: Oxidation-induced nanolite crystallization triggered the 2021 eruption of Fukutoku-Oka-no-Ba, Japan
Pumice production during the 2021 FOB eruption. (a) The oxidizing agent and high-Mg olivine were supplied by hot mafic magma, which enhanced the crystallization of magnetite nanolites. Heterogeneous bubble nucleation started first in the nanolite-rich domain. (b) The bubbly magma became buoyant and initiated convection in the magma reservoir, which enhanced the rejuvenation of the crystal mush. (c) An eruption started when the critical pressure was produced by bubble nucleation in the rejuvenated magma.
