Stability of Fe5O6 and its relation to other Fe-Mg-oxides at high pressures and temperatures
-
Alan B. Woodland
, Laura Uenver-Thiele , Tiziana Boffa Ballaran , Nobuyoshi Miyajima, Kevin Rosbach
und Takayuki Ishii
Abstract
The stability of Fe5O6 has been experimentally determined under pressure-temperature conditions relevant for the Earth’s deeper upper mantle down to the upper portion of the lower mantle (to 28 GPa). In addition, we investigated the incorporation of Mg into Fe5O6 and its systematics, which allows us to discuss the relevance of this phase for the mantle. Experiments were performed from 8–28 GPa and 900–1600 °C. Additional oxide phases may appear if the bulk composition does not maintain the
Solid solution along the Fe5O6-Mg3Fe2O6 binary is quite limited, reaching a maximum Mg content of ~0.82 cations per formula unit (i.e.,
The large stability field of Fe5O6 implies that this phase could likely occur in locally Fe-rich environments, like those sampled by some “deep” diamonds. However, the limited solubility of Mg in the O6-phase leads us to conclude that the O5-phase should be of much more relevance as an accessory phase in a peridotitic mantle assemblage.
Acknowledgments and Funding
E. Alig was very helpful in obtaining the X‑ray powder diffraction patterns and C. Heckel aided with the microprobe measurements. We are grateful to Thomas Kautz and Svyatoslav Shcheka for their help with the multi-anvil experiments in Frankfurt and Bayreuth. Fruitful discussions with Dan Frost and Gerhard Brey are gratefully acknowledged. The comments of two anonymous reviewers improved the manuscript. This study was supported by the Deutsche Forschungsgemeinschaft through grants Wo 652/20-2 and BO 2550/7-2 to A.B.W. and T.B.B., respectively.
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© 2023 Mineralogical Society of America
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Artikel in diesem Heft
- MSA Review
- Nickel in olivine as an exploration indicator for magmatic Ni-Cu sulfide deposits: A data review and re-evaluation
- Repeat, fast, and high-resolution mapping of fine-scale trace element distribution in pyrite and marcasite by LA-Q-ICP-MS with the Aerosol Rapid Introduction System (ARIS)
- Continuous Be mineralization from two-mica granite to pegmatite: Critical element enrichment processes in a Himalayan leucogranite pluton
- An evolutionary system of mineralogy, Part VI: Earth’s earliest Hadean crust (>4370 Ma)
- Oxidation or cation re-arrangement? Distinct behavior of riebeckite at high temperature
- Fe3+/FeT ratios of amphiboles determined by high spatial resolution single-crystal synchrotron Mössbauer spectroscopy
- How clay delamination supports aseismic slip
- The influence of Al2O3 on the structural properties of MgSiO3 akimotoite
- Atomistic insight into the ferroelastic post-stishovite transition by high-pressure single-crystal X-ray diffraction
- Epidote as a conveyor of water into the Earth’s deep mantle in subduction zones: Insights from coupled high-pressure and high-temperature experiments
- Potential link between antigorite dehydration and shallow intermediate-depth earthquakes in hot subduction zones
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- From schwertmannite to natrojarosite: Long-term stability and kinetic approach
- Trace element and isotopic (S, Pb) constraints on the formation of the giant Chalukou porphyry Mo deposit, NE China
- Textural and chemical evolution of magnetite from the Paleozoic Shuanglong Fe-Cu deposit: Implications for tracing ore-forming fluids
- Jingwenite-(Y) from the Yushui Cu deposit, South China: The first occurrence of a V-HREE-bearing silicate mineral
- Wenjiite, Ti10(Si,P,◻)7, and kangjinlaite, Ti11(Si,P)10, new minerals in the ternary Ti-P-Si system from the Luobusa ophiolite, Tibet, China
- Evaluating the physicochemical conditions for gold occurrences in pyrite
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