European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 34, issue 6
Articles | Volume 34, issue 6
https://doi.org/10.5194/ejm-34-645-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/ejm-34-645-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 34, issue 6
Research article
 | 
14 Dec 2022
Research article |  | 14 Dec 2022

Iron oxidation state in serpentines and magnesian chlorites of subduction-related rocks

Bruno Reynard, Clémentine Fellah, and Catherine McCammon

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Latest update: 20 Nov 2024
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Short summary
Serpentines, magnesian clay-like minerals formed in subduction zones, contain iron in either ferrous or ferric form. The oxidation state of the iron form controls the composition of fluids that form when they are destabilized by heating. Results obtained here with Mössbauer spectroscopy are compared with X-ray spectroscopy and shown to be more reliable for serpentines and magnesium-rich chlorites. Fluids released by serpentines in subduction may be less oxidized than previously thought.
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