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Iron oxide reduction in methane-rich deep Baltic Sea sediments

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Standard

Iron oxide reduction in methane-rich deep Baltic Sea sediments. / Egger, Matthias; Hagens, Mathilde; Sapart, Celia J.; Dijkstra; Van Helmond, Niels A.G.M.; Mogollón, Jose M.; Risgaard-Petersen, Nils; van der Veen, Carina; Kasten, S.; Riedinger, Natascha; Bottcher; Rockmann, Thomas; Jørgensen, Bo Barker; Slomp, Caroline P.

In: Geochimica et Cosmochimica Acta, Vol. 207, 2017, p. 256-276.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Egger, M, Hagens, M, Sapart, CJ, Dijkstra, Van Helmond, NAGM, Mogollón, JM, Risgaard-Petersen, N, van der Veen, C, Kasten, S, Riedinger, N, Bottcher, Rockmann, T, Jørgensen, BB & Slomp, CP 2017, 'Iron oxide reduction in methane-rich deep Baltic Sea sediments', Geochimica et Cosmochimica Acta, vol. 207, pp. 256-276. https://doi.org/10.1016/j.gca.2017.03.019

APA

Egger, M., Hagens, M., Sapart, C. J., Dijkstra, Van Helmond, N. A. G. M., Mogollón, J. M., Risgaard-Petersen, N., van der Veen, C., Kasten, S., Riedinger, N., Bottcher, Rockmann, T., Jørgensen, B. B., & Slomp, C. P. (2017). Iron oxide reduction in methane-rich deep Baltic Sea sediments. Geochimica et Cosmochimica Acta, 207, 256-276. https://doi.org/10.1016/j.gca.2017.03.019

CBE

Egger M, Hagens M, Sapart CJ, Dijkstra, Van Helmond NAGM, Mogollón JM, Risgaard-Petersen N, van der Veen C, Kasten S, Riedinger N, Bottcher, Rockmann T, Jørgensen BB, Slomp CP. 2017. Iron oxide reduction in methane-rich deep Baltic Sea sediments. Geochimica et Cosmochimica Acta. 207:256-276. https://doi.org/10.1016/j.gca.2017.03.019

MLA

Egger, Matthias et al. "Iron oxide reduction in methane-rich deep Baltic Sea sediments". Geochimica et Cosmochimica Acta. 2017, 207. 256-276. https://doi.org/10.1016/j.gca.2017.03.019

Vancouver

Egger M, Hagens M, Sapart CJ, Dijkstra, Van Helmond NAGM, Mogollón JM et al. Iron oxide reduction in methane-rich deep Baltic Sea sediments. Geochimica et Cosmochimica Acta. 2017;207:256-276. https://doi.org/10.1016/j.gca.2017.03.019

Author

Egger, Matthias ; Hagens, Mathilde ; Sapart, Celia J. ; Dijkstra ; Van Helmond, Niels A.G.M. ; Mogollón, Jose M. ; Risgaard-Petersen, Nils ; van der Veen, Carina ; Kasten, S. ; Riedinger, Natascha ; Bottcher ; Rockmann, Thomas ; Jørgensen, Bo Barker ; Slomp, Caroline P. / Iron oxide reduction in methane-rich deep Baltic Sea sediments. In: Geochimica et Cosmochimica Acta. 2017 ; Vol. 207. pp. 256-276.

Bibtex

@article{a7267657ad3b430ab1a5fc18e810d65c,
title = "Iron oxide reduction in methane-rich deep Baltic Sea sediments",
abstract = "Methane is a powerful greenhouse gas and its emission from marine sediments to the atmosphere is largely controlled by anaerobic oxidation of methane (AOM). Traditionally, sulfate is considered to be the most important electron acceptor for AOM in marine sediments. Recent evidence suggests, however, that AOM may also be coupled to the reduction of iron (Fe) oxides. In the Baltic Sea, the post-glacial transition from the Ancylus freshwater phase to the Littorina brackish/marine phase (A/L-transition) around 9–7kyrBP (before present), resulted in the accumulation of organic-rich brackish/marine sediments overlying organic-poor limnic deposits rich in Fe oxides. Methane produced in the organic-rich layer diffuses into the lake sediments, thus allowing for the possible coupling between Fe oxide reduction and methane oxidation. Here, we combine detailed geochemical analyses of the sediment and pore water retrieved from three sites that were drilled during the IODP Baltic Sea Paleoenvironment Expedition 347 with multicomponent diagenetic modeling to study the possible role of Fe-mediated AOM as a mechanism for the apparent Fe oxide reduction in the methane-bearing lake deposits below the A/L transition. Our results reveal a complex interplay between production, oxidation and transport of methane showing that besides organoclastic Fe reduction, oxidation of downward migrating methane with Fe oxides may also explain the elevated concentrations of dissolved ferrous Fe in deep Baltic Sea sediments. Our findings imply that the transition of a lake toward a marine system could lead to reactivation of deeply buried, mostly crystalline Fe oxides in organic-poor lake deposits through reactions with downward diffusing methane from the overlying organic-rich marine sediments. Based on the geochemical profiles and numerical modeling, we propose that a potential coupling between Fe oxide reduction and methane oxidation likely affects deep Fe cycling and related biogeochemical processes, such as burial of phosphorus, in systems subject to changes in organic matter loading or bottom water salinity.",
author = "Matthias Egger and Mathilde Hagens and Sapart, {Celia J.} and Dijkstra and {Van Helmond}, {Niels A.G.M.} and Mogoll{\'o}n, {Jose M.} and Nils Risgaard-Petersen and {van der Veen}, Carina and S. Kasten and Natascha Riedinger and Bottcher and Thomas Rockmann and J{\o}rgensen, {Bo Barker} and Slomp, {Caroline P.}",
year = "2017",
doi = "10.1016/j.gca.2017.03.019",
language = "English",
volume = "207",
pages = "256--276",
journal = "Geochimica et Cosmochimica Acta",
issn = "0016-7037",
publisher = "Pergamon Press",

}

RIS

TY - JOUR

T1 - Iron oxide reduction in methane-rich deep Baltic Sea sediments

AU - Egger, Matthias

AU - Hagens, Mathilde

AU - Sapart, Celia J.

AU - Dijkstra, null

AU - Van Helmond, Niels A.G.M.

AU - Mogollón, Jose M.

AU - Risgaard-Petersen, Nils

AU - van der Veen, Carina

AU - Kasten, S.

AU - Riedinger, Natascha

AU - Bottcher, null

AU - Rockmann, Thomas

AU - Jørgensen, Bo Barker

AU - Slomp, Caroline P.

PY - 2017

Y1 - 2017

N2 - Methane is a powerful greenhouse gas and its emission from marine sediments to the atmosphere is largely controlled by anaerobic oxidation of methane (AOM). Traditionally, sulfate is considered to be the most important electron acceptor for AOM in marine sediments. Recent evidence suggests, however, that AOM may also be coupled to the reduction of iron (Fe) oxides. In the Baltic Sea, the post-glacial transition from the Ancylus freshwater phase to the Littorina brackish/marine phase (A/L-transition) around 9–7kyrBP (before present), resulted in the accumulation of organic-rich brackish/marine sediments overlying organic-poor limnic deposits rich in Fe oxides. Methane produced in the organic-rich layer diffuses into the lake sediments, thus allowing for the possible coupling between Fe oxide reduction and methane oxidation. Here, we combine detailed geochemical analyses of the sediment and pore water retrieved from three sites that were drilled during the IODP Baltic Sea Paleoenvironment Expedition 347 with multicomponent diagenetic modeling to study the possible role of Fe-mediated AOM as a mechanism for the apparent Fe oxide reduction in the methane-bearing lake deposits below the A/L transition. Our results reveal a complex interplay between production, oxidation and transport of methane showing that besides organoclastic Fe reduction, oxidation of downward migrating methane with Fe oxides may also explain the elevated concentrations of dissolved ferrous Fe in deep Baltic Sea sediments. Our findings imply that the transition of a lake toward a marine system could lead to reactivation of deeply buried, mostly crystalline Fe oxides in organic-poor lake deposits through reactions with downward diffusing methane from the overlying organic-rich marine sediments. Based on the geochemical profiles and numerical modeling, we propose that a potential coupling between Fe oxide reduction and methane oxidation likely affects deep Fe cycling and related biogeochemical processes, such as burial of phosphorus, in systems subject to changes in organic matter loading or bottom water salinity.

AB - Methane is a powerful greenhouse gas and its emission from marine sediments to the atmosphere is largely controlled by anaerobic oxidation of methane (AOM). Traditionally, sulfate is considered to be the most important electron acceptor for AOM in marine sediments. Recent evidence suggests, however, that AOM may also be coupled to the reduction of iron (Fe) oxides. In the Baltic Sea, the post-glacial transition from the Ancylus freshwater phase to the Littorina brackish/marine phase (A/L-transition) around 9–7kyrBP (before present), resulted in the accumulation of organic-rich brackish/marine sediments overlying organic-poor limnic deposits rich in Fe oxides. Methane produced in the organic-rich layer diffuses into the lake sediments, thus allowing for the possible coupling between Fe oxide reduction and methane oxidation. Here, we combine detailed geochemical analyses of the sediment and pore water retrieved from three sites that were drilled during the IODP Baltic Sea Paleoenvironment Expedition 347 with multicomponent diagenetic modeling to study the possible role of Fe-mediated AOM as a mechanism for the apparent Fe oxide reduction in the methane-bearing lake deposits below the A/L transition. Our results reveal a complex interplay between production, oxidation and transport of methane showing that besides organoclastic Fe reduction, oxidation of downward migrating methane with Fe oxides may also explain the elevated concentrations of dissolved ferrous Fe in deep Baltic Sea sediments. Our findings imply that the transition of a lake toward a marine system could lead to reactivation of deeply buried, mostly crystalline Fe oxides in organic-poor lake deposits through reactions with downward diffusing methane from the overlying organic-rich marine sediments. Based on the geochemical profiles and numerical modeling, we propose that a potential coupling between Fe oxide reduction and methane oxidation likely affects deep Fe cycling and related biogeochemical processes, such as burial of phosphorus, in systems subject to changes in organic matter loading or bottom water salinity.

U2 - 10.1016/j.gca.2017.03.019

DO - 10.1016/j.gca.2017.03.019

M3 - Journal article

VL - 207

SP - 256

EP - 276

JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

SN - 0016-7037

ER -