Cited by 83Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisOrigins and Evolution of Life

Iron minerals within specific microfossil morphospecies of the 1.88 Ga Gunflint Formation

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Lepot, Kevin, Addad, Ahmed, Knoll, Andrew H., Wang, Jian, Troadec, David, Béché, Armand, Javaux, Emmanuelle J.·2017·Nature Communications

Abstract

Abstract Problematic microfossils dominate the palaeontological record between the Great Oxidation Event 2.4 billion years ago (Ga) and the last Palaeoproterozoic iron formations, deposited 500–600 million years later. These fossils are often associated with iron-rich sedimentary rocks, but their affinities, metabolism, and, hence, their contributions to Earth surface oxidation and Fe deposition remain unknown. Here we show that specific microfossil populations of the 1.88 Ga Gunflint Iron Formation contain Fe-silicate and Fe-carbonate nanocrystal concentrations in cell interiors. Fe minerals are absent in/on all organically preserved cell walls. These features are consistent with in vivo intracellular Fe biomineralization, with subsequent in situ recrystallization, but contrast with known patterns of post-mortem Fe mineralization. The Gunflint populations that display relatively large cells (thick-walled spheres, filament-forming rods) and intra-microfossil Fe minerals are consistent with oxygenic photosynthesizers but not with other Fe-mineralizing microorganisms studied so far. Fe biomineralization may have protected oxygenic photosynthesizers against Fe2+ toxicity during the Palaeoproterozoic.

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  • Recent analyses of microfossils within the 1.88 Ga Gunflint Iron Formation appear to confirm that cyanobacteria were a significant component of shallow-marine communities at that time.

    “Recent analyses of the microfossils within the 1.88 Ga Gunflint Iron Formation appear to confirm that cyanobacteria were a significant component of shallow-marine communities at that time (Lepot et al., 2017).”

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Research works printed but not linked: 2

  1. Pearson A. in Handbook of Hydrocarbon and Lipid Microbiology (ed. Timmis, K. N.) Ch. 9, 143–156 (Springer-Verlag, 2010).
  2. Graham L. E. & Wilcox L. W. Algae Prentice Hall (2000).

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Authors
Lepot, K., Addad, A., Knoll, A. H., Wang, J., Troadec, D., Béché, A., & Javaux, E. J.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Harvard University (US)
  • University of Saskatchewan (CA)
  • University of Antwerp (BE)
  • University of Liège (BE)
Venue
Nature Communications
Published
2017-03-23
Volume
8
Issue
1
Pages
14890-14890
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2602584335
Cited by
83
References
68
Citations by year
2026: 1 · 2025: 7 · 2024: 11 · 2023: 11 · 2022: 7 · 2021: 14 · 2020: 9 · 2019: 6 · 2018: 9 · 2017: 8
FWCI
6.22
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Flanders Marine Institute (Flanders Marine Institute) (publishedVersion, other-oa)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • HAL (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • LillOA (Université de Lille (University Of Lille)) (submittedVersion, other-oa)
  • LillOA (Université de Lille (University Of Lille)) (submittedVersion, cc-by)
  • ORBi (University of Liège) (submittedVersion, other-oa)
Funders
  • National Aeronautics and Space Administration
  • Agence Nationale de la Recherche (ANR-15-CE31-0003)
  • Fonds De La Recherche Scientifique - FNRS
  • Belgian Federal Science Policy Office
  • Centre National de la Recherche Scientifique
  • NASA Astrobiology Institute
  • FP7 Ideas: European Research Council (308074)
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
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
Keywords
Precambrian microfossils, iron biomineralization, Great Oxidation Event, Paleoproterozoic, oxygenic photosynthesis, iron toxicity, recrystallization, microbial metabolism
MeSH terms
Fossils, Iron, Minerals, Ontario, Oxidation-Reduction, Oxygen, Paleontology, Photosynthesis, Microscopy, Electron, Scanning Transmission, Geologic Sediments

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