Eruption style transition during the 2017–2018 eruptive activity at the Shinmoedake volcano, Kirishima, Japan: surface phenomena and eruptive products

Earth, Planets and Space

Table 2 Whole rock chemical compositions of the eruptive materials during the 2017–2018 Shinmoedake eruption

Sample name	SNM171011-03	SNM171012-02	SNM171014	SNM180303-1	SNM18030301	SNM18030303	SNM18030407	SNM18030411	SNM18030708-ca
Sample type	Ash	Ash	Ash	Ash	Ash	Ash	Ash	Ash	Ash
Abbreviation	A	A	A	A	A	A	A	A	A
Eruption date	11-Oct-17	12-Oct-17	14-Oct-17	3-Mar-18	3-Mar-18	3-Mar-18	4-Mar-18	4-Mar-18	7-Mar-18
SiO₂	62.73	61.56	60.76	59.42	59.22	59.27	59.77	59.72	58.28
TiO₂	0.70	0.74	0.72	0.70	0.69	0.70	0.70	0.70	0.63
Al₂O₃	17.25	18.60	16.95	17.91	17.70	17.67	17.29	17.63	17.65
tFeO	6.29	7.61	6.72	6.66	6.78	6.85	7.02	7.08	6.85
MnO	0.11	0.09	0.13	0.12	0.13	0.13	0.12	0.12	0.14
MgO	2.57	2.53	4.02	3.27	3.51	3.48	3.52	3.29	4.01
CaO	5.79	5.42	6.52	7.37	7.36	7.37	7.11	7.09	7.83
Na₂O	2.51	1.81	2.47	2.75	2.79	2.74	2.64	2.60	2.87
K₂O	1.92	1.52	1.61	1.68	1.70	1.68	1.71	1.67	1.64
P₂O₅	0.13	0.13	0.10	0.12	0.12	0.12	0.12	0.12	0.10

Total	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00
Sample name	SNM18030708-p	SNM190305-0102	SNM1903050102	SNM190420A-1	SNM19051301	SNM180320-a	SNM180405-a	SNM180514a	SNM180514c
Sample type	Pumice lapilli	Lava block	Lava block	Lava	Lava	Ash	Ash	Ash	Ash
Abbreviation	P1	B	B	L	L	A	A	A	A
Eruption date	7-Mar-18	23-Mar-18	23-Mar-18	17-Mar-18	17-Mar-18	20-Mar-18	5-Apr-18	14-May-18	14-May-18
		± 14 days	± 14 days	± 8 days	± 8 days
SiO₂	58.14	58.69	58.24	58.21	58.07	59.30	58.70	58.24	58.73
TiO₂	0.68	0.71	0.71	0.72	0.71	0.68	0.70	0.74	0.71
Al₂O₃	17.48	16.93	17.03	17.19	17.28	16.97	16.83	15.95	16.66
tFeO	7.12	7.25	7.36	7.31	7.23	7.00	7.34	8.06	7.38
MnO	0.14	0.14	0.14	0.14	0.14	0.14	0.14	0.16	0.15
MgO	3.94	4.02	4.32	4.13	4.27	4.11	4.25	5.03	4.31
CaO	7.81	7.50	7.60	7.67	7.71	7.18	7.38	7.27	7.36
Na₂O	2.91	2.90	2.82	2.86	2.86	2.80	2.83	2.79	2.88
K₂O	1.67	1.75	1.66	1.65	1.62	1.70	1.72	1.65	1.72
P₂O₅	0.11	0.11	0.11	0.12	0.11	0.10	0.11	0.11	0.11
Total	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00	100.00