Abstract
Naturally occuring gases (fluids) in metamorphic and igneous systems are known to be mixtures of several volatile species, usually including H2O, CO2, CO, H2, CH4, H2S or SO2 in major or minor amounts. The thermodynamic interpretation of experimental results, the thermodynamic calculation of reactions, and the accurate determination of fluid compositions recorded by natural assemblages require knowledge of the thermodynamic properties of the geologically important fluid-phase species. Because very few accurate experimental determinations of these properties exist, it seems necessary to rely on an equation of state which can be used to calculate thermodynamic properties of fluid mixtures in geologically important pressure-temperature regions.
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© 1977 D. Reidel Publishing Company, Dordrecht-Holland
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Holloway, J.R. (1977). Fugacity and Activity of Molecular Species in Supercritical Fluids. In: Fraser, D.G. (eds) Thermodynamics in Geology. NATO Advanced Study Institutes Series, vol 30. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1252-2_9
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DOI: https://doi.org/10.1007/978-94-010-1252-2_9
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