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  • Earth System Knowledge Platform  (1)
  • Elsevier  (1)
  • Kiel : GEOMAR, Helmholtz-Zentrum für Ozeanforschung
  • 2020-2022  (1)
  • 1995-1999  (1)
Document type
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Year
  • 1
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    Unknown
    Reactive Fe (II) layers in deep-sea sediments (1999)
    Elsevier
    In:  Geochimica et Cosmochimica Acta, 63 (10). pp. 1517-1526.
    Details
    Publication Date: 2017-08-25
    Description: The percentage of the structural Fe(II) in clay minerals that is readily oxidized to Fe(III) upon contact with atmospheric oxygen was determined across the downcore tan–green color change in Peru Basin sediments. This latent fraction of reactive Fe(II) was only found in the green strata, where it proved to be large enough to constitute a deep reaction layer with respect to the pore water O2 and NO3−. Large variations were detected in the proportion of the reactive Fe(II) concentration to the organic matter content along core profiles. Hence, the commonly observed tan–green color change in marine sediments marks the top of a reactive Fe(II) layer, which may represent the major barrier to the movement of oxidation fronts in pelagic subsurface sediments. This is also demonstrated by numerical model simulations. The findings imply that geochemical barriers to pore water oxidation fronts form diagenetically in the sea floor wherever the stage of iron reduction is reached, provided that the sediments contain a significant amount of structural iron in clay minerals.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/S0016-7037(99)00104-0
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Manganknollen-Abbau gefährdet die Ökosysteme der Tiefsee (Interview) (2020)
    Earth System Knowledge Platform
    In:  EPIC3Earth System Knowledge Platform
    Details
    Publication Date: 2020-05-17
    Description: Der Tiefseebergbau wird als eine neue Möglichkeit diskutiert, um wichtige Rohstoffe zu fördern. Entsprechende Technologien befinden sich in der Entwicklung. Wir sprechen mit Forschenden vom Max-Planck-Institut für Marine Mikrobiologie, vom Alfred-Wegener-Institut und vom GEOMAR, die sich mit den Auswirkungen des Abbaus von Rohstoffen in der Tiefsee auf das dortige Ökosystem befassen.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Miscellaneous , notRev
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    PAPER (OA)
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