East Pacific Rise hydrothermal chimneys at 9°50' N (Bio9'' and K-vent)
East Pacific Rise, 9-10° N, Océan Pacifique (eaux internationales)
Volcanogenic massive sulfidesZn-Cu
- Type
- Active basalt-hosted seafloor massive sulphides
Active chimneys sampled by the Alvin submersible (dives 4053 and 4057): high-temperature Cu-rich chimney of Bio9'' (383 °C, chalcopyrite and sphalerite-pyrite) and low-temperature Fe-Zn chimney-diffuser of K-vent (203 °C, sphalerite, pyrite, marcasite and galena). Bio9'' sulphides have δ66Zn close to that of the fluid and basalts; K-vent sulphides are heavy because they precipitated from a fluid already enriched in heavy isotopes by subsurface precipitation of light sphalerite, the only fluid supersaturated in sphalerite at the vent according to John et al. (2008). Indicative coordinates (9°50' N segment).
δ66Zn in ‰ (per mil) Values of the same system
Standard : JMC 3-0749L
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.12 ± 0.12 ‰ | −0.09 / 0.27 ‰ | 6 | chalcopyrite of the Cu-rich Bio9'' chimney (383 °C) Mean and standard deviation recalculated from 6 analyses, zinc mostly carried by sphalerite inclusions; maximum offset with adjacent sphalerite of 0.18 ‰. | John et al. (2008), Zinc stable isotopes in seafloor hydrothermal vent fluids and chimney… |
| 0.17 ± 0.15 ‰ | 0.02 / 0.32 ‰ | 4 | sphalerite and pyrite of the Cu-rich Bio9'' chimney (383 °C) Mean and standard deviation recalculated from 4 analyses, chimney fluid at +0.21 ‰ on average. | John et al. (2008), Zinc stable isotopes in seafloor hydrothermal vent fluids and chimney… |
| 0.92 ± 0.28 ‰ | 0.6 / 1.13 ‰ | 3 | sphalerite, pyrite and galena of the K-vent chimney-diffuser (203 °C, conduit base) Mean and standard deviation recalculated from 3 analyses, sub-samples A1, A2b and A2t. | John et al. (2008), Zinc stable isotopes in seafloor hydrothermal vent fluids and chimney… |
| 0.87 ± 0.42 ‰ | 0.57 / 1.17 ‰ | 2 | pyrite and sphalerite of the K-vent chimney-diffuser (203 °C, upper porous structure) Mean and standard deviation recalculated from 2 analyses, sub-samples A4 and A5; reconstructed fluid at +1.04 and +0.98 ‰. | John et al. (2008), Zinc stable isotopes in seafloor hydrothermal vent fluids and chimney… |
Deposits of the same type
- Flin Flon Canada
- Kidd Creek Canada
- Logatchev hydrothermal field Océan Atlantique (eaux internationales)
- Lousal Portugal
- Aljustrel Portugal
- Neves-Corvo Portugal
- Neves-Corvo Portugal
- São Domingos Portugal
Cite this page
IsoFind Atlas (2026). East Pacific Rise hydrothermal chimneys at 9°50' N (Bio9'' and K-vent), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/cheminees-hydrothermales-de-la-dorsale-est-pacifique-a-9-50-n-bio9-et-k-vent/ (accessed 2026-10-15).
@misc{isofind2026eastpacificrisehydrothermalch,
title = {East Pacific Rise hydrothermal chimneys at 9°50' N (Bio9'' and K-vent), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/cheminees-hydrothermales-de-la-dorsale-est-pacifique-a-9-50-n-bio9-et-k-vent/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15