Gold(I) Complexation in Chloride Hydrothermal Fluids
Abstract
A critical assessment and processing of experimental data published in the literature on the stability of hydroxide and chloride complexes of Au(I) was carried out. Based on the obtained Gibbs energies of AuOH(aq), AuCl(aq), and $${\text{AuCl}}_{2}^{ - }$$ , the standard thermodynamic properties and parameters of the Helgeson–Kirkham–Flowers model equation of state were determined for these species. The resulting set of parameters makes it possible to calculate the solubility of Au in chloride fluids up to 1000°C, 5000 bar with the possibility of extrapolation to higher PT parameters. As a geological application of the obtained data, a model calculation of the deposition of native gold by cooling chloride–sulfide fluid was carried out with an assessment of changes in the composition of the fluid, the sequence of formation of solid phases, and changes in the fineness of gold.
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- Authors
- Tagirov, B. R., Akinfiev, N. N., & Zotov, A. V.
- Affiliations
- Institute of Geology of Ore Deposits Petrography Mineralogy and Geochemistry (RU)
- Russian State Geological Prospecting University (RU)
- Corresponding author
- Tagirov, B. R.
- Venue
- Geology of Ore Deposits
- Publisher
- Pleiades Publishing Ltd
- Published
- 2024-10
- Volume
- 66
- Issue
- 5
- Pages
- 581-597
- ISSN
- 1075-7015 (ISSN-L)
- 1555-6476
- OpenAlex
- W4403845034
- Semantic Scholar
- 3419fc4e3e8f8fedf81e41d8f65f568d763adb5f
- Cited by
- 7
- References
- 41
- Citations by year
- 2026: 3 · 2025: 2 · 2024: 2
- FWCI
- 1.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Geology of Ore Deposits (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
- Physical Sciences › Chemical Engineering › Filtration and Separation › Chemical and Physical Properties in Aqueous Solutions
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
- Keywords
- gold chloride, Gibbs energy of formation, gold solubility, gold fineness, ore genesis
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