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Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard

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Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard. / Wehrmann, Laura M.; Riedinger, Natascha; Brunner, Benjamin; Kamyshny, Alexey; Hubert, Casey R. J.; Herbert, Lisa C.; Bruechert, Volker; Jorgensen, Bo Barker; Ferdelman, Timothy G.; Formolo, Michael J.

In: Chemical Geology, Vol. 466, 05.09.2017, p. 678-695.

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

Harvard

Wehrmann, LM, Riedinger, N, Brunner, B, Kamyshny, A, Hubert, CRJ, Herbert, LC, Bruechert, V, Jorgensen, BB, Ferdelman, TG & Formolo, MJ 2017, 'Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard', Chemical Geology, vol. 466, pp. 678-695. https://doi.org/10.1016/j.chemgeo.2017.06.013

APA

Wehrmann, L. M., Riedinger, N., Brunner, B., Kamyshny, A., Hubert, C. R. J., Herbert, L. C., Bruechert, V., Jorgensen, B. B., Ferdelman, T. G., & Formolo, M. J. (2017). Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard. Chemical Geology, 466, 678-695. https://doi.org/10.1016/j.chemgeo.2017.06.013

CBE

MLA

Vancouver

Author

Wehrmann, Laura M. ; Riedinger, Natascha ; Brunner, Benjamin ; Kamyshny, Alexey ; Hubert, Casey R. J. ; Herbert, Lisa C. ; Bruechert, Volker ; Jorgensen, Bo Barker ; Ferdelman, Timothy G. ; Formolo, Michael J. / Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard. In: Chemical Geology. 2017 ; Vol. 466. pp. 678-695.

Bibtex

@article{fc94f00b189a4fababc89924c8434876,
title = "Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard",
abstract = "This study investigates how glacially delivered reactive iron (oxyhydr) oxide and manganese oxide phases influence the biogeochemical cycling of sulfur in sediments of three Arctic fjords and how the biogeochemical signatures of these processes are preserved. Results reveal differences in the concentrations of dissolved iron and manganese in pore-waters and the concentration of solid-phase sulfur species within individual fjords and amongst the three fjords, likely controlled by the varying input of reactive iron (oxyhydr) oxides to the sediment. Broadly, the stations can be divided into three categories based on their biogeochemical signals. Stations in the first category, located in Smeerenburgfjorden, are characterized by relatively low concentrations of (easily) reducible particulate iron phases, increasing concentrations of iron monosulfides, pyrite, and elemental sulfur with depth, and low pore-water dissolved iron and manganese concentrations. Biogeochemical processes at these stations are primarily driven by organoclastic sulfate reduction, sulfur disproportionation and the subsequent reaction and sequestration of sulfide in the sediment as iron monosulfide and pyrite. Sulfur and oxygen isotope values of sulfate display progressive enrichment in heavy isotopes with depth at these stations. In contrast, concentrations of (easily) reducible particulate iron phases and pore-water dissolved iron (up to 850 mu M) and manganese (up to 650 mu M) are very high at stations of the second and third category, located in Kongsfjorden and Van Mijenfjorden, while iron monosulfide and pyrite contents are extremely low. The amount of pyrite and its isotope values in conjunction with organic sulfur compounds provide evidence for a detrital origin of a fraction of these sulfur compounds. At the Kongsfjorden and Van Mijenfjorden stations, oxidative pathways of the sedimentary sulfur cycle, controlled by the high availability of reducible particulate iron phases, play an important role, leading to the effective recycling of sulfide to sulfate through sulfur intermediates and concomitant resupply of the sulfate reservoir with S-32. In both fjords, elemental sulfur was only detected at the outer fjord stations grouped into the third category. Our study provides a framework for interpreting the Fe-S-C geochemistry of similar continental shelf areas in modern settings and ultimately for identifying these environments in the rock record.",
keywords = "Sediment biogeochemistry, Oxidative sulfur cycling, Arctic fjords, Sulfur and oxygen isotopes, Iron geochemistry, BACTERIAL SULFATE REDUCTION, ARCTIC MARINE-SEDIMENTS, ORGANIC-MATTER, ELEMENTAL SULFUR, OXYGEN-ISOTOPE, PYRITE FORMATION, REDUCING BACTERIA, SULFIDE OXIDATION, STABLE SULFUR, DISSIMILATORY SULFATE",
author = "Wehrmann, {Laura M.} and Natascha Riedinger and Benjamin Brunner and Alexey Kamyshny and Hubert, {Casey R. J.} and Herbert, {Lisa C.} and Volker Bruechert and Jorgensen, {Bo Barker} and Ferdelman, {Timothy G.} and Formolo, {Michael J.}",
year = "2017",
month = sep,
day = "5",
doi = "10.1016/j.chemgeo.2017.06.013",
language = "English",
volume = "466",
pages = "678--695",
journal = "Chemical Geology",
issn = "0009-2541",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Iron-controlled oxidative sulfur cycling recorded in the distribution and isotopic composition of sulfur species in glacially influenced fjord sediments of west Svalbard

AU - Wehrmann, Laura M.

AU - Riedinger, Natascha

AU - Brunner, Benjamin

AU - Kamyshny, Alexey

AU - Hubert, Casey R. J.

AU - Herbert, Lisa C.

AU - Bruechert, Volker

AU - Jorgensen, Bo Barker

AU - Ferdelman, Timothy G.

AU - Formolo, Michael J.

PY - 2017/9/5

Y1 - 2017/9/5

N2 - This study investigates how glacially delivered reactive iron (oxyhydr) oxide and manganese oxide phases influence the biogeochemical cycling of sulfur in sediments of three Arctic fjords and how the biogeochemical signatures of these processes are preserved. Results reveal differences in the concentrations of dissolved iron and manganese in pore-waters and the concentration of solid-phase sulfur species within individual fjords and amongst the three fjords, likely controlled by the varying input of reactive iron (oxyhydr) oxides to the sediment. Broadly, the stations can be divided into three categories based on their biogeochemical signals. Stations in the first category, located in Smeerenburgfjorden, are characterized by relatively low concentrations of (easily) reducible particulate iron phases, increasing concentrations of iron monosulfides, pyrite, and elemental sulfur with depth, and low pore-water dissolved iron and manganese concentrations. Biogeochemical processes at these stations are primarily driven by organoclastic sulfate reduction, sulfur disproportionation and the subsequent reaction and sequestration of sulfide in the sediment as iron monosulfide and pyrite. Sulfur and oxygen isotope values of sulfate display progressive enrichment in heavy isotopes with depth at these stations. In contrast, concentrations of (easily) reducible particulate iron phases and pore-water dissolved iron (up to 850 mu M) and manganese (up to 650 mu M) are very high at stations of the second and third category, located in Kongsfjorden and Van Mijenfjorden, while iron monosulfide and pyrite contents are extremely low. The amount of pyrite and its isotope values in conjunction with organic sulfur compounds provide evidence for a detrital origin of a fraction of these sulfur compounds. At the Kongsfjorden and Van Mijenfjorden stations, oxidative pathways of the sedimentary sulfur cycle, controlled by the high availability of reducible particulate iron phases, play an important role, leading to the effective recycling of sulfide to sulfate through sulfur intermediates and concomitant resupply of the sulfate reservoir with S-32. In both fjords, elemental sulfur was only detected at the outer fjord stations grouped into the third category. Our study provides a framework for interpreting the Fe-S-C geochemistry of similar continental shelf areas in modern settings and ultimately for identifying these environments in the rock record.

AB - This study investigates how glacially delivered reactive iron (oxyhydr) oxide and manganese oxide phases influence the biogeochemical cycling of sulfur in sediments of three Arctic fjords and how the biogeochemical signatures of these processes are preserved. Results reveal differences in the concentrations of dissolved iron and manganese in pore-waters and the concentration of solid-phase sulfur species within individual fjords and amongst the three fjords, likely controlled by the varying input of reactive iron (oxyhydr) oxides to the sediment. Broadly, the stations can be divided into three categories based on their biogeochemical signals. Stations in the first category, located in Smeerenburgfjorden, are characterized by relatively low concentrations of (easily) reducible particulate iron phases, increasing concentrations of iron monosulfides, pyrite, and elemental sulfur with depth, and low pore-water dissolved iron and manganese concentrations. Biogeochemical processes at these stations are primarily driven by organoclastic sulfate reduction, sulfur disproportionation and the subsequent reaction and sequestration of sulfide in the sediment as iron monosulfide and pyrite. Sulfur and oxygen isotope values of sulfate display progressive enrichment in heavy isotopes with depth at these stations. In contrast, concentrations of (easily) reducible particulate iron phases and pore-water dissolved iron (up to 850 mu M) and manganese (up to 650 mu M) are very high at stations of the second and third category, located in Kongsfjorden and Van Mijenfjorden, while iron monosulfide and pyrite contents are extremely low. The amount of pyrite and its isotope values in conjunction with organic sulfur compounds provide evidence for a detrital origin of a fraction of these sulfur compounds. At the Kongsfjorden and Van Mijenfjorden stations, oxidative pathways of the sedimentary sulfur cycle, controlled by the high availability of reducible particulate iron phases, play an important role, leading to the effective recycling of sulfide to sulfate through sulfur intermediates and concomitant resupply of the sulfate reservoir with S-32. In both fjords, elemental sulfur was only detected at the outer fjord stations grouped into the third category. Our study provides a framework for interpreting the Fe-S-C geochemistry of similar continental shelf areas in modern settings and ultimately for identifying these environments in the rock record.

KW - Sediment biogeochemistry

KW - Oxidative sulfur cycling

KW - Arctic fjords

KW - Sulfur and oxygen isotopes

KW - Iron geochemistry

KW - BACTERIAL SULFATE REDUCTION

KW - ARCTIC MARINE-SEDIMENTS

KW - ORGANIC-MATTER

KW - ELEMENTAL SULFUR

KW - OXYGEN-ISOTOPE

KW - PYRITE FORMATION

KW - REDUCING BACTERIA

KW - SULFIDE OXIDATION

KW - STABLE SULFUR

KW - DISSIMILATORY SULFATE

U2 - 10.1016/j.chemgeo.2017.06.013

DO - 10.1016/j.chemgeo.2017.06.013

M3 - Journal article

VL - 466

SP - 678

EP - 695

JO - Chemical Geology

JF - Chemical Geology

SN - 0009-2541

ER -