Oxygen Fugacity Across Tectonic Settings
Here we compile published analytical data from lithologies that constrain fO2 (n=860 volcanic rocks - lavas and tephras and n=326 mantle lithologies- the majority peridotites) from ridges, back-arc basins, forearcs, arcs, and plumes. Because calculated fO2 varies with choice of activity model, we re-calculate fO2 for each dataset from compositional data, applying the same set of activity models and methodologies for each data type. Additionally, we compile trace element concentrations (e.g. vanadium) which serve as an additional fO2-proxy. The compiled data show that, on average, volcanic rocks and mantle rocks from the same tectonic setting yield similar fO2s, but mantle lithologies span a much larger range in fO2 than volcanics. Multiple Fe-based oxybarometric methods and vanadium partitioning vary with statistical significance as a function of tectonic setting, with fO2 ridges < back arcs < arcs. Plume lithologies are more nuanced to interpret, but indicate fO2s >= ridges.
How to cite this dataset:
Cottrell, E., Birner, S., Brounce, M., Davis, F., Waters, L., Kelley, K., 2021. Oxygen Fugacity Across Tectonic Settings, Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). https://doi.org/10.26022/IEDA/111899.
DOI Creation Date:
Cottrell, E., S. Birner, M. Brounce, F. A. Davis, L. E. Waters and K. A. Kelley (In Press). Oxygen Fugacity Across Tectonic Settings. AGU Geophysical Monograph Redox variables and mechanisms in magmatism and volcanism. D. R. Neuville and R. Moretti, Wiley. 2020. DOI: 10.1002/essoar.10502445.1
Creative Commons Attribution-ShareAlike 4.0 International [CC BY-SA 4.0]
National Science Foundation: 1433212
National Science Foundation: 1347248
National Science Foundation: 0841006
Coverage Scope: Global
User Contributed Keyword(s):
oxygen fugacity, fO2, XANES, oxybarometry, spinel-peridotite, peridotite, pyroxenite, basalt, melt inclusion, arc, ridge, plume, ocean island basalt,
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