Fig. 9From: Evolution of the magma plumbing system of Miyakejima volcano with periodic recharge of basaltic magmasWhole-rock Na2O + K2O, MgO, K2O and Zr contents, and the FeO*/MgO ratio of the magmas within the last 3500 years including Period 1–3 plotted against their SiO2 contents in weight percent. All plotted data are normalized as total 100%Back to article page