Fig. 2

The results of the major-element composition analysis of the eruptive products of the 1979–2014 eruptions. The major-element compositions of the whole-rock January 26–27, 2014, scoria, groundmass in the 1979, 1989, and 2014 scoria, and 2003 ash particles, and melt inclusions in the 1979, 1989, and 2014 scoria are shown. The analytical errors of the EPMA measurement (Saito et al. 2010) are shown as black bars in the lower part of each graph. The chemical compositions of the melt calculated from the whole-rock composition of I141129S01 using the MELTS program (Table 5; Additional file 3: Table S2) are also shown as cross symbols (see text). The whole-rock composition of the scoria erupted from 1929 to 1974 and from June to November 1979 (GSJ and Kumamoto Univ 1990; Ono and Watanabe 1985), scoria from October 1989 to November 1990 (GSJ and Kumamoto Univ 1990; Aso Volcano Museum et al. 1991), and scoria from November 2014 to March 2015 (NIED et al. 2015a, b) are also shown