Articles | Volume 36, issue 4
https://doi.org/10.5194/ejm-36-555-2024
https://doi.org/10.5194/ejm-36-555-2024
Research article
 | 
03 Jul 2024
Research article |  | 03 Jul 2024

H2 mobility and redox control in open vs. closed hydrothermal oceanic systems – evidence from serpentinization experiments

Colin Fauguerolles, Teddy Castelain, Johan Villeneuve, and Michel Pichavant

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Cited articles

Abrajano, T. A., Sturchio, N. C., Kennedy, B. M., Lyon, G. L., Muehlenbachs, K., and Bohlke, J. K.: Geochemistry of reduced gas related to serpentinization of the Zambales ophiolite, Philippines, Appl. Geochem., 5, 625–630, https://doi.org/10.1016/0883-2927(90)90060-I, 1990. a
Allen, D. E. and Seyfried Jr., W. E.: Compositional controls on vent fluids from ultramafic-hosted hydrothermal systems at mid-ocean ridges: An experimental study at 400 °C, 500 bars, Geochim. Cosmochim. Ac., 67, 1531–1542, https://doi.org/10.1016/S0016-7037(02)01173-0, 2003. a, b, c, d
Andreani, M., Mével, C., Boullier, A.-M., and Escartin, J.: Dynamic control on serpentine crystallization in veins: constraints on hydration processes in oceanic peridotites, Geochem. Geophy. Geosy., 8, Q02012, https://doi.org/10.1029/2006GC001373, 2007. a, b, c, d, e
Andreani, M., Munoz, M., Marcaillou, C., and Delacour, A.: μXANES study of iron redox state in serpentine during oceanic serpentinization, Lithos, 178, 70–83, https://doi.org/10.1016/j.lithos.2013.04.008, 2013. a, b, c, d, e
Auzende, A.-L., Daniel, I., Reynard, B., Lemaire, C., and Guyot, F.: High-pressure behaviour of serpentine minerals: a Raman spectroscopic study, Phys. Chem. Miner., 31, 269–277, https://doi.org/10.1007/s00269-004-0384-0, 2004. a
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Short summary
To explore the influence of the redox state of the environment on the serpentinization reaction, we have developed an original experimental setup. Reducing conditions, leading to the formation of serpentine and magnetite, and oxidizing conditions, leading to the formation of serpentine and hematite, are discussed in terms of analogues of low- and high-permeability hydrothermal systems, respectively. The influence of the redox on brucite stability and hydrogen production is also established.