Fig. 3From: Pre-eruption magmatic processes and magma plumbing system at Hachijo-Nishiyama volcano, Izu–Bonin arc, JapanSiO2 variation diagram for a Al2O3, b MgO, c K2O, d FeO*/MgO, and e Sr, and f Ba–Zr diagram for samples from the Nishiyama volcano. Circles of all colors represent the samples from the Fujitozando stage and squares for the Okoshigahana stageBack to article page