Cited by 83Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisGeomagnetism and Paleomagnetism Studies

Iron isotope fractionation during microbial dissimilatory iron oxide reduction in simulated Archaean seawater

PERCAK‐DENNETT, E. M., BEARD, B. L., XU, H., KONISHI, H., JOHNSON, C. M., RODEN, E. E.·2011·Geobiology

Abstract

The largest Fe isotope excursion yet measured in marine sedimentary rocks occurs in shales, carbonates, and banded iron formations of Neoarchaean and Paleoproterozoic age. The results of field and laboratory studies suggest a potential role for microbial dissimilatory iron reduction (DIR) in producing this excursion. However, most experimental studies of Fe isotope fractionation during DIR have been conducted in simple geochemical systems, using pure Fe(III) oxide substrates that are not direct analogues to phases likely to have been present in Precambrian marine environments. In this study, Fe isotope fractionation was investigated during microbial reduction of an amorphous Fe(III) oxide-silica coprecipitate in anoxic, high-silica, low-sulphate artificial Archaean seawater at 30 °C to determine if such conditions alter the extent of reduction or isotopic fractionations relative to those observed in simple systems. The Fe(III)-Si coprecipitate was highly reducible (c. 80% reduction) in the presence of excess acetate. The coprecipitate did not undergo phase conversion (e.g. to green rust, magnetite or siderite) during reduction. Iron isotope fractionations suggest that rapid and near-complete isotope exchange took place among all Fe(II) and Fe(III) components, in contrast to previous work on goethite and hematite, where exchange was limited to the outer few atom layers of the substrate. Large quantities of low-δ(56)Fe Fe(II) (aqueous and solid phase) were produced during reduction of the Fe(III)-Si coprecipitate. These findings shed new light on DIR as a mechanism for producing Fe isotope variations observed in Neoarchaean and Paleoproterozoic marine sedimentary rocks.

Integrity signals

Registry

Crossref · 10.1111/j.1472-4669.2011.00277.x

Cites

86 of 86 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Recent work suggests that in the presence of dissolved silica, the initial water column precipitate may have been a Fe(III)-Si gel.

    “However, recent work suggests that in the presence of dissolved silica, the initial water column precipitate may have been a Fe(III)-Si gel (e.g., Percak-Dennett et al., 2011).”

    From Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history (2017) · cites this paper as Percak-Dennett et al., 2011

  • Dissolved Fe(II) oxidation in the presence of dissolved silica produces an Fe(III)-Si gel that is homogenous on the nm scale, indicating a single phase in which Si and Fe are tightly bonded and distinct from Si sorbed to ferrihydrite.

    “PercakDennett et al. (2011) and Wu et al. (2012) studied dissolved Fe(II) oxidation in the presence of dissolved silica, which produced an Fe(III)-Si gel that was homogenous on the nm scale, indicating the presence of a single phase in which Si and Fe are tightly bonded and distinct from, for example, Si sorbed to ferrihydrite”

    From Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history (2017) · cites this paper as Percak-Dennett et al., 2011

Cites

Flagged first, then by citations

2 of the 88 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
PERCAK‐DENNETT, E. M., BEARD, B. L., XU, H., KONISHI, H., JOHNSON, C. M., & RODEN, E. E.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
RODEN, E. E.
Venue
Geobiology
Publisher
Wiley
Published
2011-04-19
Volume
9
Issue
3
Pages
205-220
ISSN
  • 1472-4669 (ISSN-L)
  • 1472-4677
OpenAlex
W2120735445
Cited by
83
References
88
Citations by year
2026: 5 · 2025: 5 · 2024: 4 · 2023: 3 · 2022: 7 · 2021: 6 · 2020: 8 · 2019: 9 · 2018: 4 · 2017: 10 · 2016: 5 · 2015: 2 · 2014: 3 · 2013: 6 · 2012: 5
FWCI
3.32
Type
journal article
Language
en
Open access
closed
Locations
  • Geobiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
NASA Astrobiology Institute
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Geomagnetism and Paleomagnetism Studies
Keywords
iron isotope fractionation, dissimilatory iron reduction, microbial iron reduction, banded iron formations, Neoarchaean, Paleoproterozoic, isotope exchange, acetate
MeSH terms
Archaea, Iron, Iron Isotopes, Oxidation-Reduction, Silicon Dioxide, Geologic Sediments

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review