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  • 1
    Online Resource
    Online Resource
    From source to seep : geochemical applications in hydrocarbon systems (2018)
    London : Geological Society
    Details Availability
    Keywords: Aufsatzsammlung ; Erdgas ; Erdöl ; Methan ; Erdgasgeologie ; Isotopenhäufigkeit ; Aufsatzsammlung ; Methanlagerstätte ; Erdölgeologie ; Geochemie ; Organische Geochemie ; Biogeochemie ; Isotopengeochemie ; Erdgas ; Erdöl ; Methan ; Erdgasgeologie ; Isotopenhäufigkeit ; Aufsatzsammlung ; Methanlagerstätte ; Erdölgeologie ; Geochemie ; Organische Geochemie ; Biogeochemie ; Isotopengeochemie
    Type of Medium: Online Resource
    Pages: 1 Online Resource
    Series Statement: Geological society special publications 468
    URL: http://sp.lyellcollection.org/content/468/1
    DDC: 553.2/8
    Language: English
    Note: Dateiformat Volltext: PDF, abstracts
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  • 2
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    Sulfur Cycling in an Iron Oxide-Dominated, Dynamic Marine Depositional System: The Argentine Continental Margin (2017)
    Frontiers
    In:  Frontiers in Earth Science, 5 (33).
    Details
    Publication Date: 2020-02-06
    Description: The interplay between sediment deposition patterns, organic matter type and the quantity and quality of reactive mineral phases determines the accumulation, speciation, and isotope composition of pore water and solid phase sulfur constituents in marine sediments. Here, we present the sulfur geochemistry of siliciclastic sediments from two sites along the Argentine continental slope—a system characterized by dynamic deposition and reworking, which result in non-steady state conditions. The two investigated sites have different depositional histories but have in common that reactive iron phases are abundant and that organic matter is refractory—conditions that result in low organoclastic sulfate reduction rates (SRR). Deposition of reworked, isotopically light pyrite and sulfurized organic matter appear to be important contributors to the sulfur inventory, with only minor addition of pyrite from organoclastic sulfate reduction above the sulfate-methane transition (SMT). Pore-water sulfide is limited to a narrow zone at the SMT. The core of that zone is dominated by pyrite accumulation. Iron monosulfide and elemental sulfur accumulate above and below this zone. Iron monosulfide precipitation is driven by the reaction of low amounts of hydrogen sulfide with ferrous iron and is in competition with the oxidation of sulfide by iron (oxyhydr)oxides to form elemental sulfur. The intervals marked by precipitation of intermediate sulfur phases at the margin of the zone with free sulfide are bordered by two distinct peaks in total organic sulfur (TOS). Organic matter sulfurization appears to precede pyrite formation in the iron-dominated margins of the sulfide zone, potentially linked to the presence of polysulfides formed by reaction between dissolved sulfide and elemental sulfur. Thus, SMTs can be hotspots for organic matter sulfurization in sulfide-limited, reactive iron-rich marine sedimentary systems. Furthermore, existence of elemental sulfur and iron monosulfide phases meters below the SMT demonstrates that in sulfide-limited systems metastable sulfur constituents are not readily converted to pyrite but can be buried to deeper sediment depths. Our data show that in non-steady state systems, redox zones do not occur in sequence but can reappear or proceed in inverse sequence throughout the sediment column, causing similar mineral alteration processes to occur at the same time at different sediment depths.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3389/feart.2017.00033
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Sulfur and oxygen isotope fractionation during sulfate reduction coupled to anaerobic oxidation of methane is dependent on methane concentration (2014)
    Elsevier
    In:  Earth and Planetary Science Letters, 399 . pp. 61-73.
    Details
    Publication Date: 2017-03-06
    Description: Highlights • Naturally enriched AOM biomass was studied in high-pressure continuous incubation. • We report the first S- and O-isotope fractionation values by sulfate reduction coupled to AOM from culture studies. • There is a tight link between methane concentration and S- and O-isotope fractionation. • S- and O-isotope fractionation values indicate reversibility of energy limited microbial processes. • The wide range of environmental S- and O-isotope signatures can be explained. Abstract Isotope signatures of sulfur compounds are key tools for studying sulfur cycling in the modern environment and throughout earth's history. However, for meaningful interpretations, the isotope effects of the processes involved must be known. Sulfate reduction coupled to the anaerobic oxidation of methane (AOM-SR) plays a pivotal role in sedimentary sulfur cycling and is the main process responsible for the consumption of methane in marine sediments − thereby efficiently limiting the escape of this potent greenhouse gas from the seabed to the overlying water column and atmosphere. In contrast to classical dissimilatory sulfate reduction (DSR), where sulfur and oxygen isotope effects have been measured in culture studies and a wide range of isotope effects has been observed, the sulfur and oxygen isotope effects by AOM-SR are unknown. This gap in knowledge severely hampers the interpretation of sulfur cycling in methane-bearing sediments, especially because, unlike DSR which is carried out by a single organism, AOM-SR is presumably catalyzed by consortia of archaea and bacteria that both contribute to the reduction of sulfate to sulfide. We studied sulfur and oxygen isotope effects by AOM-SR at various aqueous methane concentrations from 1.4±0.6 mM1.4±0.6 mM up to 58.8±10.5 mM58.8±10.5 mM in continuous incubation at steady state. Changes in the concentration of methane induced strong changes in sulfur isotope enrichment (View the MathML sourceεS34) and oxygen isotope exchange between water and sulfate relative to sulfate reduction (θOθO), as well as sulfate reduction rates (SRR). Smallest View the MathML sourceεS34 (21.9±1.9‰21.9±1.9‰) and θOθO (0.5±0.20.5±0.2) as well as highest SRR were observed for the highest methane concentration, whereas highest View the MathML sourceεS34 (67.3±26.1‰67.3±26.1‰) and θOθO (2.5±1.52.5±1.5) and lowest SRR were reached at low methane concentration. Our results show that View the MathML sourceεS34, θOθO and SRR during AOM-SR are very sensitive to methane concentration and thus also correlate with energy yield. In sulfate–methane transition zones, AOM-SR is likely to induce very large sulfur isotope fractionation between sulfate and sulfide (i.e. 〉60‰〉60‰) and will drive the oxygen isotope composition of sulfate towards the sulfate–water oxygen isotope equilibrium value. Sulfur isotope fractionation by AOM-SR at gas seeps, where methane fluxes are high, will be much smaller (i.e. 20 to 40‰).
    Type: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.1016/j.epsl.2014.04.047
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Iron and manganese speciation and cycling in glacially influenced high-latitude fjord sediments (West Spitsbergen, Svalbard): Evidence for a benthic recycling-transport mechanism (2014)
    Elsevier
    In:  Geochimica et Cosmochimica Acta, 141 . pp. 628-655.
    Details
    Publication Date: 2016-06-14
    Description: Glacial environments may provide an important but poorly constrained source of potentially bioavailable iron and manganese phases to the coastal ocean in high-latitude regions. Little is known about the fate and biogeochemical cycling of glacially derived iron and manganese in the coastal marine realm. Sediment and porewater samples were collected along transects from the fjord mouths to the tidewater glaciers at the fjord heads in Smeerenburgfjorden, Kongsfjorden, and Van Keulenfjorden along Western Svalbard. Solid-phase iron and manganese speciation, determined by sequential chemical extraction, could be linked to the compositions of the local bedrock and hydrological/weathering conditions below the local glaciers. The concentration and sulfur isotope composition of chromium reducible sulfur (CRS) in Kongs- and Van Keulenfjorden sediments largely reflect the delivery rate and isotope composition of detrital pyrite originating from adjacent glaciers. The varying input of reducible iron and manganese oxide phases and the input of organic matter of varying reactivity control the pathways of organic carbon mineralization in the sediments of the three fjords. High reducible iron and manganese oxide concentrations and elevated metal accumulation rates coupled to low input of “fresh” organic matter lead to a strong expression of dissimilatory metal oxide reduction evidenced in very high porewater iron (up to 800 lM) and manganese (up to 210 lM) concentrations in Kongsfjorden and Van Keulenfjorden. Sediment reworking by the benthic macrofauna and physical sediment resuspension via iceberg calving may be additional factors that promote extensive benthic iron and manganese cycling in these fjords. On-going benthic recycling of glacially derived dissolved iron into overlying seawater, where partial reoxidation and deposition occurs, facilitates the transport of iron across the fjords and potentially into adjacent continental shelf waters. Such iron-dominated fjord sediments are likely to provide significant fluxes of potentially bioavailable iron to coastal waters and beyond. By contrast, low delivery of reducible iron (oxyhydr)oxide phases and elevated organic carbon mineralization rates driven by elevated input of “fresh” marine organic matter allow organoclastic sulfate reduction to dominate carbon remineralization at the outer Smeerenburgfjorden sites, which may limit iron fluxes to the water column.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.gca.2014.06.007
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    An interdisciplinary investigation of a recent submarine mass transport deposit at the continental margin off Uruguay (2011)
    AGU (American Geophysical Union)
    In:  Geochemistry, Geophysics, Geosystems, 12 (8). Q08009.
    Details
    Publication Date: 2019-09-23
    Description: Assessing frequency and extent of mass movement at continental margins is crucial to evaluate risks for offshore constructions and coastal areas. A multidisciplinary approach including geophysical, sedimentological, geotechnical, and geochemical methods was applied to investigate multistage mass transport deposits (MTDs) off Uruguay, on top of which no surficial hemipelagic drape was detected based on echosounder data. Nonsteady state pore water conditions are evidenced by a distinct gradient change in the sulfate (SO42−) profile at 2.8 m depth. A sharp sedimentological contact at 2.43 m coincides with an abrupt downward increase in shear strength from ∼10 to 〉20 kPa. This boundary is interpreted as a paleosurface (and top of an older MTD) that has recently been covered by a sediment package during a younger landslide event. This youngest MTD supposedly originated from an upslope position and carried its initial pore water signature downward. The kink in the SO42− profile ∼35 cm below the sedimentological and geotechnical contact indicates that bioirrigation affected the paleosurface before deposition of the youngest MTD. Based on modeling of the diffusive re-equilibration of SO42− the age of the most recent MTD is estimated to be 〈30 years. The mass movement was possibly related to an earthquake in 1988 (∼70 km southwest of the core location). Probabilistic slope stability back analysis of general landslide structures in the study area reveals that slope failure initiation requires additional ground accelerations. Therefore, we consider the earthquake as a reasonable trigger if additional weakening processes (e.g., erosion by previous retrogressive failure events or excess pore pressures) preconditioned the slope for failure. Our study reveals the necessity of multidisciplinary approaches to accurately recognize and date recent slope failures in complex settings such as the investigated area.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/2011GC003669
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    An inorganic geochemical argument for coupled anaerobic oxidation of methane and iron reduction in marine sediments (2014)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Geobiology, WILEY-BLACKWELL PUBLISHING, ISSN: 1472-4677
    Details
    Publication Date: 2019-07-17
    Description: Here, we present results from sediments collected in the Argentine Basin, a non-steady state depositional marine system characterized by abundant oxidized iron within methane-rich layers due to sediment reworking followed by rapid deposition. Our comprehensive inorganic data set shows that iron reduction in these sulfate and sulfide-depleted sediments is best explained by a microbially mediated process—implicating anaerobic oxidation of methane coupled to iron reduction (Fe-AOM) as the most likely major mechanism. Although important in many modern marine environments, iron-driven AOM may not consume similar amounts of methane compared with sulfate-dependent AOM. Nevertheless, it may have broad impact on the deep biosphere and dominate both iron and methane cycling in sulfate-lean marine settings. Fe-AOM might have been particularly relevant in the Archean ocean, 〉2.5 billion years ago, known for its production and accumulation of iron oxides (in iron formations) in a biosphere likely replete with methane but low in sulfate. Methane at that time was a critical greenhouse gas capable of sustaining a habitable climate under relatively low solar luminosity, and relationships to iron cycling may have impacted if not dominated methane loss from the biosphere.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 7
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    Sulfur cycling in an iron oxide-dominated, dynamic marine depositional system: The Argentine continental margin (2017)
    Frontiers
    In:  EPIC3Frontiers in Earth Science, Frontiers, 5(33)
    Details
    Publication Date: 2017-05-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 8
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    Rapid microbial methanogenesis during CO2 storage in hydrocarbon reservoirs (2022)
    Nature Research
    Details
    Publication Date: 2022-05-27
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Tyne, R. L., Barry, P. H., Lawson, M., Byrne, D. J., Warr, O., Xie, H., Hillegonds, D. J., Formolo, M., Summers, Z. M., Skinner, B., Eiler, J. M., & Ballentine, C. J. Rapid microbial methanogenesis during CO2 storage in hydrocarbon reservoirs. Nature, 600(7890), (2021): 670-674, https://doi.org/10.1038/s41586-021-04153-3.
    Description: Carbon capture and storage (CCS) is a key technology to mitigate the environmental impact of carbon dioxide (CO2) emissions. An understanding of the potential trapping and storage mechanisms is required to provide confidence in safe and secure CO2 geological sequestration1,2. Depleted hydrocarbon reservoirs have substantial CO2 storage potential1,3, and numerous hydrocarbon reservoirs have undergone CO2 injection as a means of enhanced oil recovery (CO2-EOR), providing an opportunity to evaluate the (bio)geochemical behaviour of injected carbon. Here we present noble gas, stable isotope, clumped isotope and gene-sequencing analyses from a CO2-EOR project in the Olla Field (Louisiana, USA). We show that microbial methanogenesis converted as much as 13–19% of the injected CO2 to methane (CH4) and up to an additional 74% of CO2 was dissolved in the groundwater. We calculate an in situ microbial methanogenesis rate from within a natural system of 73–109 millimoles of CH4 per cubic metre (standard temperature and pressure) per year for the Olla Field. Similar geochemical trends in both injected and natural CO2 fields suggest that microbial methanogenesis may be an important subsurface sink of CO2 globally. For CO2 sequestration sites within the environmental window for microbial methanogenesis, conversion to CH4 should be considered in site selection.
    Description: R.L.T. was supported by a Natural Environment Research Council studentship (grant reference NE/L002612/1). C.J.B. and P.H.B. acknowledge A. Regberg and B. Meurer for their support of the project and help with sample collection. C.J.B. was part supported by an Earth4D CIFAR fellowship. P.H.B. was supported by NSF awards 1923915 and 2015789. O.W. was supported by Natural Sciences and Engineering Research Council of Canada Discovery and Accelerator grants awarded to the Sherwood Lollar research group and acknowledges B. Sherwood Lollar’s support for the project. Z.M.S. acknowledges J. Biddle and G. Christman for their help in generating the microbial data.
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 9
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    Pore water and solid phase sulfur, carbon and iron data from samples collected in the Argentine Basin during expedition M78 (2016)
    PANGAEA
    In:  Supplement to: Riedinger, Natascha; Brunner, Benjamin; Krastel, Sebastian; Arnold, Gail Lee; Wehrmann, Laura Mariana; Formolo, Michael J; Beck, Antje; Bates, Steven M; Henkel, Susann; Kasten, Sabine; Lyons, Timothy W (2017): Sulfur cycling in an iron oxide-dominated, dynamic marine depositional system: The Argentine continental margin. Frontiers in Earth Science, 5, https://doi.org/10.3389/feart.2017.00033
    Details
    Publication Date: 2023-03-03
    Description: The interplay between sediment deposition patterns, organic matter type and the quantity and quality of reactive mineral phases determines the accumulation, speciation and isotope composition of pore water and solid phase sulfur constituents in marine sediments. Here, we present the sulfur geochemistry of siliciclastic sediments from two sites along the Argentine continental slope--a system characterized by dynamic deposition and reworking, which result in non-steady state conditions. The two investigated sites have different depositional histories but have in common that reactive iron phases are abundant and that organic matter is refractory--conditions that result in low organoclastic sulfate reduction rates. Deposition of reworked, isotopically light pyrite and sulfurized organic matter appear to be important contributors to the sulfur inventory, with only minor addition of pyrite from organoclastic sulfate reduction above the sulfate-methane transition (SMT). Pore-water sulfide is limited to a narrow zone at the SMT. The core of that zone is dominated by pyrite accumulation. Iron monosulfide and elemental sulfur accumulate above and below this zone. Iron monosulfide precipitation is driven by the reaction of low amounts of hydrogen sulfide with ferrous iron and is in competition with the oxidation of sulfide by iron (oxyhydr)oxides to form elemental sulfur. The intervals marked by precipitation of intermediate sulfur phases at the margin of the zone with free sulfide are bordered by two distinct peaks in total organic sulfur. Organic matter sulfurization appears to precede pyrite formation in the iron-dominated margins of the sulfide zone, potentially linked to the presence of polysulfides formed by reaction between dissolved sulfide and elemental sulfur. Thus, SMTs can be hotspots for organic matter sulfurization in sulfide-limited, reactive iron-rich marine sedimentary systems. Furthermore, existence of elemental sulfur and iron monosulfide phases meters below the SMT demonstrates that in sulfide-limited systems metastable sulfur constituents are not readily converted to pyrite but can be buried to deeper sediment depths. Our data show that in non-steady state systems, redox zones do not occur in sequence but can reappear or proceed in inverse sequence throughout the sediment column, causing similar mineral alteration processes to occur at the same time at different sediment depths.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 12 datasets
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    DATA PANGAEA
  • 10
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    Lead 210 measured in sediment core GeoB13804-2 (2011)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 362; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Gamma-ray spectrometry; GeoB13804-2; Lead-210, supported; Lead-210, unsupported; M78/3A; Meteor (1986); MUC; MultiCorer
    Type: Dataset
    Format: text/tab-separated-values, 68 data points
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    DATA PANGAEA
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