Fe3+ content of experimental pyroxenes and melt analyzed with in-situ synchrotron Mössbauer spectroscopy
Abstract:
The redox variations during magmatic processes are mainly controlled by the partition coefficients of Fe3+ and Fe2+ between minerals and melts (DFe3+, DFe2+ and DFe3+/DFe2+). However, the mineral/melt DFe3+ and DFe2+ are sparsely reported due to the difficulties in determining Fe3+ content of the minerals in quenched experimental run products. Recent progress in the use of synchrotron radiation sources has developed new frontiers in the study of Fe3+ partitioning between minerals and melts. In this study, we analyzed Fe3+ content of experimental pyroxenes and melt with the in-situ synchrotron Mössbauer spectroscopy using a beam size as small as < 10 μm and determined accurate DFe3+ and DFe2+ for orthopyroxene (opx), clinopyroxene (cpx) and spinel (spl) crystallized at the equilibrium P and T of 1.3 GPa and 1200 °C. The results show that the DFe3+/DFe2+ are < 1 for opx and > 1 for cpx and spl. It is, therefore, expected that during partial melting of mantle spinel peridotite, the consumption of opx will decrease Fe3+/FeT and fO2 of the magma, while the consumption of cpx and spl has the opposite effect. In contrast, the crystallization of opx from basaltic magma tends to increase Fe3+/FeT and fO2 of the magma.
How to cite this dataset:
Wang, J., 2024. Fe3+ content of experimental pyroxenes and melt analyzed with in-situ synchrotron Mössbauer spectroscopy, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA).
https://doi.org/10.60520/IEDA/113540. Accessed 2025-02-22.
DOI Creation Date:
2024-11-15
Related
Publication(s):
Wang et al., Determination of Fe3+ and Fe2+ partition coefficients between pyroxenes and basaltic melt with in-situ synchrotron Mössbauer spectroscopy. J Pet (submitted 2024)
License:
Creative Commons Attribution-ShareAlike 4.0 International [CC-BY-SA-4.0]
Keyword(s):
Coverage Scope: Space/Planetary
Geographic Location: High pressure experiments, magma generation and differentiation
User Contributed Keyword(s):
Synchrotron Mössbauer spectroscopy, Partitioning of Fe3+ and Fe2+, Pyroxenes/basaltic melt, Redox variations, Magmatic processes
Data Available On:
2024-11-15