Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 98 |
| Fachzeitschrift | Contributions to Mineralogy and Petrology |
| Jahrgang | 173 |
| Ausgabenummer | 12 |
| Frühes Online-Datum | 9 Nov. 2018 |
| Publikationsstatus | Veröffentlicht - Dez. 2018 |
Abstract
The effect of MgO and total FeO on ferric/ferrous ratio in model multicomponent silicate melts was investigated experimentally in the temperature range 1300–1500 °C at 1 atm total pressure in air. We demonstrate that the addition of these weak network modifier cations results in an increase of Fe3+/Fe2+ ratio in both mafic and silicic melts. Based on present and published experimental data, a new empirical equation is proposed to predict the ferric/ferrous ratio as a function of oxygen fugacity, temperature and melt composition. In contrast to previous equations, the compositional effect of melts on the Fe3+/Fe2+ ratio is not only modeled by the sum of the molar fraction of the individual oxide components. Additional interactions terms have also been incorporated. The main advantage of the proposed model is its applicability for a wide compositional range. However, its application to felsic melts (> 68 wt% SiO2) is not recommended. Other advantages of this equation and differences when compared with previous models are discussed.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
- Erdkunde und Planetologie (insg.)
- Geochemie und Petrologie
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in: Contributions to Mineralogy and Petrology, Jahrgang 173, Nr. 12, 98, 12.2018.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Ferric/ferrous ratio in silicate melts
T2 - a new model for 1 atm data with special emphasis on the effects of melt composition
AU - Borisov, Alexander
AU - Behrens, Harald
AU - Holtz, Francois
N1 - Publisher Copyright: © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2018/12
Y1 - 2018/12
N2 - The effect of MgO and total FeO on ferric/ferrous ratio in model multicomponent silicate melts was investigated experimentally in the temperature range 1300–1500 °C at 1 atm total pressure in air. We demonstrate that the addition of these weak network modifier cations results in an increase of Fe3+/Fe2+ ratio in both mafic and silicic melts. Based on present and published experimental data, a new empirical equation is proposed to predict the ferric/ferrous ratio as a function of oxygen fugacity, temperature and melt composition. In contrast to previous equations, the compositional effect of melts on the Fe3+/Fe2+ ratio is not only modeled by the sum of the molar fraction of the individual oxide components. Additional interactions terms have also been incorporated. The main advantage of the proposed model is its applicability for a wide compositional range. However, its application to felsic melts (> 68 wt% SiO2) is not recommended. Other advantages of this equation and differences when compared with previous models are discussed.
AB - The effect of MgO and total FeO on ferric/ferrous ratio in model multicomponent silicate melts was investigated experimentally in the temperature range 1300–1500 °C at 1 atm total pressure in air. We demonstrate that the addition of these weak network modifier cations results in an increase of Fe3+/Fe2+ ratio in both mafic and silicic melts. Based on present and published experimental data, a new empirical equation is proposed to predict the ferric/ferrous ratio as a function of oxygen fugacity, temperature and melt composition. In contrast to previous equations, the compositional effect of melts on the Fe3+/Fe2+ ratio is not only modeled by the sum of the molar fraction of the individual oxide components. Additional interactions terms have also been incorporated. The main advantage of the proposed model is its applicability for a wide compositional range. However, its application to felsic melts (> 68 wt% SiO2) is not recommended. Other advantages of this equation and differences when compared with previous models are discussed.
KW - Experiment
KW - FeO
KW - Ferric/ferrous ratio
KW - MgO
KW - MORB
KW - Silicate melt
UR - http://www.scopus.com/inward/record.url?scp=85056278989&partnerID=8YFLogxK
U2 - 10.1007/s00410-018-1524-8
DO - 10.1007/s00410-018-1524-8
M3 - Article
AN - SCOPUS:85056278989
VL - 173
JO - Contributions to Mineralogy and Petrology
JF - Contributions to Mineralogy and Petrology
SN - 0010-7999
IS - 12
M1 - 98
ER -