Menez Gwen hydrothermal field
Mid-Atlantic Ridge, near the Azores Triple Junction, Océan Atlantique (eaux portugaises, Açores)
Volcanogenic massive sulfidesFe (sulfures)
- Type
- Shallow seafloor hydrothermal sulfides (diffuse-flow slabs)
Seafloor hydrothermal sulfides analysed for Sb by Rouxel et al. (2003), values published as ε123Sb. Marcasite from low-temperature diffuse-flow hydrothermal slabs, with very high δ123Sb (about +1.5 to +1.7 ‰), fractionated up to 1 ‰ relative to seawater: kinetic reduction of seawater Sb(V) to Sb(III) in a fluid that lost about 85 % of its Sb(V). Indicative coordinates.
δ123Sb in ‰ (per mil) Values of the same system
Standard : Solution Spex du CRPG (Rouxel et al., 2003)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.62 ± 0.1 ‰ | 1.55 / 1.69 ‰ | 2 | marcasite from a low-temperature diffuse-flow slab Mean and standard deviation recalculated from 2 analyses, +1.55 to +1.69 (DV-16-03a +1.69; DV-16-03b +1.55); duplicates averaged: DV-16-03b (ε 15.2 and 15.8); 22 µg/g Sb; highest values of the study, about 1 ‰ above seawater. | Rouxel et al. (2003), Antimony isotope variations in natural systems and implications for… |
Deposits of the same type
- Lucky Strike hydrothermal field Océan Atlantique (eaux portugaises, Açores)
- Lousal Portugal
- Aljustrel Portugal
- Neves-Corvo Portugal
- Neves-Corvo Portugal
- São Domingos Portugal
- Tharsis Spain
- La Zarza Spain
Cite this page
IsoFind Atlas (2026). Menez Gwen hydrothermal field, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/champ-hydrothermal-de-menez-gwen/ (accessed 2026-10-16).
@misc{isofind2026menezgwenhydrothermalfieldiso,
title = {Menez Gwen hydrothermal field, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/champ-hydrothermal-de-menez-gwen/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16