Geochemical consequences of oxygen diffusion from the oceanic crust into overlying sediments and its significance for biogeochemical cycles based on sediments of the northeast Pacific

Versteegh, Gerard J. M.; Koschinsky, Andrea; Kuhn, Thomas; Preuss, Inken; Kasten, Sabine

doi:https://doi.org/10.5194/bg-18-4965-2021

Articles | Volume 18, issue 17

https://doi.org/10.5194/bg-18-4965-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-18-4965-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 17

Research article

| Highlight paper

|

13 Sep 2021

Research article | Highlight paper |

| 13 Sep 2021

Geochemical consequences of oxygen diffusion from the oceanic crust into overlying sediments and its significance for biogeochemical cycles based on sediments of the northeast Pacific

Gerard J. M. Versteegh, Andrea Koschinsky, Thomas Kuhn, Inken Preuss, and Sabine Kasten

Data sets

Porewater and solid phase Mn, Ni, Co and porewater O2 and NO3 from the Clarion-Clipperton Zone NE Pacific. Gerard J. M. Versteegh, Andrea Koschinsky, Thomas Kuhn, Inken Preuss, and Sabine Kasten https://doi.pangaea.de/10.1594/PANGAEA.933062

Short summary

Oxygen penetrates sediments not only from the ocean bottom waters but also from the basement. The impact of the latter is poorly understood. We show that this basement oxygen has a clear impact on the nitrogen cycle, the redox state, and the distribution of manganese, nickel cobalt and organic matter in the sediments. This is important for (1) global biogeochemical cycles, (2) understanding sedimentary life and (3) the interpretation of the sediment record to reconstruct the past.