Table 1 Open in new tab Major element...

Table 1

Major element compositions (wt%) of parental magmas modeled in this study using rhyolite-MELTS v.1.2.0.

	Parental magmas
Rock/Melt type¹	Amphibolite (High-Al tholeiite)	Leucoamphibolite (High-Mg andesite)	Picrite²	Komatiite
SiO₂ (wt%)	47.71	52.27	46.16	46.61
TiO₂	0.51	1.3	0.41	0.29
Al₂O₃	17.63	15.42	13.95	11.94
FeOt	9.81	9.4	10.02	-
Fe₂O₃t	-	-	-	11.94
MnO	0.17	0.15	0.17	0.23
MgO	9.36	6.94	17.45	28.06
CaO	12.96	10.65	10.30	5.79
Na₂O	1.64	2.91	1.29	0.22
K₂O	0.14	0.51	0.11	0.45
P₂O₅	0.06	0.44	0.05	0.02
Cr₂O₃	0.06	0.05	0.06	0.352
NiO	0.002	0.003	0.01	0.17
Mg#³	65	59	76	84
H₂O⁴	0, 0.25, 2, 4	0, 0.25, 2, 4	0, 0.25, 2, 4	0, 0.25, 2, 4

	Parental magmas
Rock/Melt type¹	Amphibolite (High-Al tholeiite)	Leucoamphibolite (High-Mg andesite)	Picrite²	Komatiite
SiO₂ (wt%)	47.71	52.27	46.16	46.61
TiO₂	0.51	1.3	0.41	0.29
Al₂O₃	17.63	15.42	13.95	11.94
FeOt	9.81	9.4	10.02	-
Fe₂O₃t	-	-	-	11.94
MnO	0.17	0.15	0.17	0.23
MgO	9.36	6.94	17.45	28.06
CaO	12.96	10.65	10.30	5.79
Na₂O	1.64	2.91	1.29	0.22
K₂O	0.14	0.51	0.11	0.45
P₂O₅	0.06	0.44	0.05	0.02
Cr₂O₃	0.06	0.05	0.06	0.352
NiO	0.002	0.003	0.01	0.17
Mg#³	65	59	76	84
H₂O⁴	0, 0.25, 2, 4	0, 0.25, 2, 4	0, 0.25, 2, 4	0, 0.25, 2, 4

¹Source for parental compositions can be found in Supplementary Materials 6.

²Picrite estimated with PRIMELT3 based on High-Al tholeiite parental, following procedure for basalts of Herzberg & Asimow (2008, 2015).

³Mg# number is defined as molar Mg/(Mg + Fe²⁺)^*100, Fe²⁺ is assumed to be 90% of total FeO unless Fe³⁺ has been estimated.

⁴Initial H₂O contents in wt. %, compositions normalized to 100% in modeling.