Chemical interaction of aqueous solutions with epidote-feldspar mineral assemblages in geologic systems
Abstract
Simultaneous consideration of Mossbauer and/or experimental phase equilibrium data for epidote, andradite, and hedenbergite together with the thermodynamic properties of aqueous species, CO2 - H2O fluids, and coexisting minerals permits comprehensive analysis of mineral stabilities and the effects of preferential site occupancy and solid solubility on hydrothermal solution compositions in the system CaO-FeO-Fe2O3-Al2O3-SiO2-H2O-CO2 at high pressures and temperatures. Thermodynamic analysis of compatibilities and compositions of aqueous solutions and minerals in the system Na2O-K2O-CaO-FeO-Fe2O3-Al2O3-SiO2- H2O-CO2 at pressures and temperatures to 5 kb and 600 C permits quantitative description and interpretation of phase relations among epidote, plagioclase, alkali feldspar and hydrothermal solutions in metamorphic/geothermal systems.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- May 1978
- Bibcode:
- 1978PhDT........82B
- Keywords:
-
- Chemical Analysis;
- Feldspars;
- Minerals;
- Solutions;
- Thermodynamic Properties;
- Chemical Composition;
- Chemical Equilibrium;
- High Pressure;
- High Temperature;
- Mossbauer Effect;
- Geophysics