Table 6.

Results of calculations on solid-melt-fluid equilibria obtained by means of reaction (7), representative of the olivine-clinopyroxene cotectic relationship. Input data are those listed in Table 5

SampleP(MPa)T(°C)GraphicGraphicH2Owt%CO2wt%logfO2logaSiO2awaFo(sol)aFo(liq)aDiaWo(liq)Graphic(kJ)
ST531-4b29012060.2290.7712.400.137−7.386−0.5300.0780.8060.0520.8560.16375.009
ST82 13325711950.3600.6402.900.129−7.531−0.5070.0980.8280.0580.8560.12875.929
ST531-39a21311670.3310.6692.500.105−7.876−0.4830.0830.7830.0450.8440.13378.078
ST15032007 55d28511460.5310.4693.800.145−8.097−0.5050.1350.7910.0430.8440.10779.585
14a30311550.3200.6802.900.156−7.990−0.4790.0990.7860.0420.8440.11578.984
St82p-oln932511860.2780.7222.800.169−7.613−0.4910.0970.7750.0490.8440.12176.647
st82-oln52a20911610.4120.5882.800.103−7.949−0.4900.0940.7760.0470.8440.11878.525
ST1503200730911640.2760.7242.700.159−7.879−0.4810.0870.7890.0450.8440.11478.317
ST531-39b25111590.3750.6252.900.126−7.953−0.4960.0990.7820.0420.8380.12978.645
26e22811560.3830.6172.800.113−7.995−0.4860.0970.7800.0430.8380.12478.852
St82p-oln5018411570.4340.5662.700.089−7.999−0.4470.0890.7670.0500.8370.09978.773
ST82 139a32711730.4060.5943.500.170−7.765−0.5250.1230.8050.0440.8450.13677.640
ST82 139b30111740.2620.7382.600.155−7.754−0.4880.0850.7960.0420.8450.14377.511
st79-oln3022311900.2700.7302.300.111−7.597−0.5220.0710.8130.0500.8370.15476.294
ST81 MI ave20611920.4120.5882.800.101−7.577−0.5290.0940.8170.0550.8360.14276.119
102a29811960.2780.7222.700.153−7.505−0.5040.0880.8160.0520.8360.13875.853
ST531-17b24111770.2740.7262.400.121−7.746−0.4880.0760.8070.0460.8410.14077.321
ModelDDDDHS+RGSGSGSGSGGS
  • HS: Hübner & Sato (1970) taking into account the effects of pressure on the Ni–NiO buffer according to the data of R: Robie et al. (1979); GS: Ghiorso & Sack (1995); D: Dixon (1997); G: Gasparik (1990)