Articles | Volume 18, issue 17
Biogeosciences, 18, 4965–4984, 2021
https://doi.org/10.5194/bg-18-4965-2021
Biogeosciences, 18, 4965–4984, 2021
https://doi.org/10.5194/bg-18-4965-2021

Research article 13 Sep 2021

Research article | 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 et al.

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Latest update: 20 Sep 2021
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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.
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