Calculation of Phase Relations Involving Haplogranitic Melts Using an Internally Consistent Thermodynamic Dataset

2001/04/01 by T. J. B. Holland · 1 citation
Earth and Planetary Sciences · Materials Science · Chemistry · Mathematics · #Geological and Geochemical Analysis #High-pressure geophysics and materials #Clay minerals and soil interactions #Unary operation #Thermodynamics #Ternary operation #Silicate #Phase (matter) #Geology #Binary number #Mineralogy #Chemistry #Computer science #Mathematics #Physics

paper · doi:10.1093/petrology/42.4.673

openalex publication_date 2001/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

A simple thermodynamic model is developed for silicate melts in the system CaO–Na2O–K2O–Al2O3–SiO2–H2O (CNKASH). The Holland & Powell (Journal of Metamorphic Geology, 16, 289–302, 1998) internally consistent thermodynamic dataset is extended via the incorporation of the experimentally determined melting relationships in unary and binary subsystems of CNKASH. The predictive capability of the model is evaluated via the experimental data in ternary and quaternary subsystems. The resulting dataset, with the software THERMOCALC, is then used to calculate melting relationships for haplogranitic compositions. Predictions of the P–T stabilities of assemblages in water-saturated and -undersaturated bulk compositions are illustrated. It is now possible to make useful calculations of the melting behaviour of appropriate composition rocks under crustal conditions.

Citations

• An internally consistent thermodynamic data set for phases of petrological interest
• Chemical mass transfer in magmatic processes IV. A revised and internally consistent thermodynamic model for the interpolation and extrapolation of liquid-solid equilibria in magmatic systems at elevated temperatures and pressures
• The system Na 2 O-Al 2 O 3 -SiO 2

Cited by

• Metamorphism [wikipedia]