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A re-assessment of the oxidation state of iron in MORB glasses

Berry, Andrew; Stewart, Glen A.; O'Neill, Hugh; Mallmann, Guil; Mosselmans, J. F. W.


The oxidation state of Fe, Fe/3+ΣFe (where ΣFe=Fe2++Fe3+), in glass samples of mid-ocean ridge basalt (MORB), from a wide range of localities, was determined by XANES spectroscopy to be 0.10(2) (n=42). This value is lower than that reported previously by XANES, 0.16(1) (n=103), but consistent with the most recent value determined by redox titrations, 0.11(2) (n=104), all for similar sets of samples. We attribute the anomalously high XANES value of 0.16 to a calibration error resulting from the...[Show more]

CollectionsANU Research Publications
Date published: 2018-02-01
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2017.11.032


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