Details
| Original language | English |
|---|---|
| Article number | 89 |
| Journal | Contributions to Mineralogy and Petrology |
| Volume | 180 |
| Issue number | 12 |
| Publication status | Published - 22 Nov 2025 |
Abstract
There are several models to account for the compositional effect of mafic silicate melts on ferric/ferrous ratio. However, felsic melts have been poorly investigated. In this study, both synthetic and natural silicic melts with a large compositional range (eighteen experimental series) were equilibrated at oxidizing (atmospheric conditions) and more reducing conditions in the temperature range 1401–1533 °C at 1 bar total pressure. The bulk glass composition was determined with electron probe microanalysis (EPMA) and the ferric/ferrous ratio in experimental glasses was analyzed using a wet-chemical technique. The experimental data were combined with previous data in order to formulate an empirical equation describing ferric/ferrous ratio in silicic melts as a function of oxygen fugacity, temperature and melt composition. The proposed equation predicts the log(XFeO1.5/XFeO) ratio of melts with a standard error of 0.077. The mean and standard deviation of the residuals for back-calculations of logfO2 are 0.00 and 0.36 and are − 1 and 39 °C for the temperature.
Keywords
- Experiment, Ferric/ferrous ratio, Rhyolite, Silicate melt, Silicic
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Contributions to Mineralogy and Petrology, Vol. 180, No. 12, 89, 22.11.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ferric/ferrous ratio in silicate melts
T2 - a model calibrated for felsic compositions
AU - Borisov, Alexander
AU - Krasheninnikov, Stepan
AU - Almeev, Renat
AU - Holtz, Francois
N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.
PY - 2025/11/22
Y1 - 2025/11/22
N2 - There are several models to account for the compositional effect of mafic silicate melts on ferric/ferrous ratio. However, felsic melts have been poorly investigated. In this study, both synthetic and natural silicic melts with a large compositional range (eighteen experimental series) were equilibrated at oxidizing (atmospheric conditions) and more reducing conditions in the temperature range 1401–1533 °C at 1 bar total pressure. The bulk glass composition was determined with electron probe microanalysis (EPMA) and the ferric/ferrous ratio in experimental glasses was analyzed using a wet-chemical technique. The experimental data were combined with previous data in order to formulate an empirical equation describing ferric/ferrous ratio in silicic melts as a function of oxygen fugacity, temperature and melt composition. The proposed equation predicts the log(XFeO1.5/XFeO) ratio of melts with a standard error of 0.077. The mean and standard deviation of the residuals for back-calculations of logfO2 are 0.00 and 0.36 and are − 1 and 39 °C for the temperature.
AB - There are several models to account for the compositional effect of mafic silicate melts on ferric/ferrous ratio. However, felsic melts have been poorly investigated. In this study, both synthetic and natural silicic melts with a large compositional range (eighteen experimental series) were equilibrated at oxidizing (atmospheric conditions) and more reducing conditions in the temperature range 1401–1533 °C at 1 bar total pressure. The bulk glass composition was determined with electron probe microanalysis (EPMA) and the ferric/ferrous ratio in experimental glasses was analyzed using a wet-chemical technique. The experimental data were combined with previous data in order to formulate an empirical equation describing ferric/ferrous ratio in silicic melts as a function of oxygen fugacity, temperature and melt composition. The proposed equation predicts the log(XFeO1.5/XFeO) ratio of melts with a standard error of 0.077. The mean and standard deviation of the residuals for back-calculations of logfO2 are 0.00 and 0.36 and are − 1 and 39 °C for the temperature.
KW - Experiment
KW - Ferric/ferrous ratio
KW - Rhyolite
KW - Silicate melt
KW - Silicic
UR - http://www.scopus.com/inward/record.url?scp=105022601374&partnerID=8YFLogxK
U2 - 10.1007/s00410-025-02275-9
DO - 10.1007/s00410-025-02275-9
M3 - Article
AN - SCOPUS:105022601374
VL - 180
JO - Contributions to Mineralogy and Petrology
JF - Contributions to Mineralogy and Petrology
SN - 0010-7999
IS - 12
M1 - 89
ER -