Table A5.

Summary of selected thermodynamic solutions for solid–liquid equilibria, reactions (8) and (9), for pumices [reaction (8)] and scoriae [reaction (9)] erupted during the 2002–2003 major eruptive cycle of Stromboli volcano. See text for details

T(°C)aAnaFoaCEnaCaTsΔG0I,T (kJ)log aSiO2 (0.5 wt%)log aSiO2 (3.5 wt%)P (MPa) H2O=0.5 wt%P (MPa) H2O=3.5 wt%
Reaction (8)An+2Fo+SiO2=2Cen+CaTs
10000.74650.74630.56900.046931.0489−0.4970−0.4279282323
10500.74190.74200.53060.046532.6565−0.4986−0.4271252296
11000.73760.73800.49730.046234.3173−0.5001−0.4264224271
11500.73360.73430.46830.045936.0314−0.5014−0.4257198249
12000.73000.73090.44270.045737.7992−0.5027−0.4251175228
12500.72650.72770.42010.045439.6207−0.5038−0.4244153210
13000.72340.72480.40000.045241.4960−0.5049−0.4238134194
ReferencesNewton et al. (1980)Sack & Ghiorso (1989)Gasparik (1984, 1990)Gasparik (1984, 1990)Ghiorso & Sack (1995)Ghiorso & Sack (1995)
XFo=0.83: Table 1, an. 13; XCEn=0.40: Table 2, an. 12; XAn=0.78: Table 3, an. 3; melt composition: Table 4, an. 11
Reaction (9)An=CaTs+SiO2
10000.04220.042443.4950−0.4183−0.4311376347
10500.04270.042043.9192−0.4163−0.4295276244
11000.04310.041644.3326−0.4145−0.4280174139
11300.04340.041344.5763−0.4134−0.426811153
11600.04360.041144.8171−0.4123−0.42624810
ReferencesNewton et al. (1980)Gasparik (1984, 1990)Ghiorso & Sack (1995)Ghiorso & Sack (1995)
XCaTs Table 2, an. 4; XAn=0.68: Table 3, an. 4; glass composition Table 5, an. 8
  • an.=analysis number.