Cited by 366Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisGeological and Geochemical Analysis

Aerobic bacterial pyrite oxidation and acid rock drainage during the Great Oxidation Event

Konhauser, Kurt O., Lalonde, Stefan V., Planavsky, Noah J., Pecoits, Ernesto, Lyons, Timothy W., Mojzsis, Stephen J., Rouxel, Olivier J., Barley, Mark E. +4 more·2011·Nature

Abstract

The enrichment of redox-sensitive trace metals in ancient marine sedimentary rocks has been used to determine the timing of the oxidation of the Earth's land surface. Chromium (Cr) is among the emerging proxies for tracking the effects of atmospheric oxygenation on continental weathering; this is because its supply to the oceans is dominated by terrestrial processes that can be recorded in the Cr isotope composition of Precambrian iron formations. However, the factors controlling past and present seawater Cr isotope composition are poorly understood. Here we provide an independent and complementary record of marine Cr supply, in the form of Cr concentrations and authigenic enrichment in iron-rich sedimentary rocks. Our data suggest that Cr was largely immobile on land until around 2.48 Gyr ago, but within the 160 Myr that followed--and synchronous with independent evidence for oxygenation associated with the Great Oxidation Event (see, for example, refs 4-6)--marked excursions in Cr content and Cr/Ti ratios indicate that Cr was solubilized at a scale unrivalled in history. As Cr isotope fractionations at that time were muted, Cr must have been mobilized predominantly in reduced, Cr(III), form. We demonstrate that only the oxidation of an abundant and previously stable crustal pyrite reservoir by aerobic-respiring, chemolithoautotrophic bacteria could have generated the degree of acidity required to solubilize Cr(III) from ultramafic source rocks and residual soils. This profound shift in weathering regimes beginning at 2.48 Gyr ago constitutes the earliest known geochemical evidence for acidophilic aerobes and the resulting acid rock drainage, and accounts for independent evidence of an increased supply of dissolved sulphate and sulphide-hosted trace elements to the oceans around that time. Our model adds to amassing evidence that the Archaean-Palaeoproterozoic boundary was marked by a substantial shift in terrestrial geochemistry and biology.

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Crossref · 10.1038/nature10511

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  • A significant increase in marine sulfate levels in this interval, widespread hematite-rich oolitic ironstone, and high enrichment of chromium in the middle part of the Timeball Hill Formation all suggest that a substantial rise in pO2 was at play.

    “A significant increase in marine sulfate levels in this interval (see below), widespread hematite-rich oolitic ironstone, and a high enrichment of chromium in the middle part of the Timeball Hill Formation (16, 47) all suggest that a substantial rise in pO2 was at play.”
  • In the rock record, the GOE is manifested by changes including loss of detrital uraninite, pyrite, and siderite from fluvial siliciclastic sediments at ca. 2.4 Ga; loss of iron from palaeosols older than ca. 2.4 Ga; appearance of red beds after ca. 2.3 Ga; loss of S-MIF in sulfide and sulfate minerals after 2.3 Ga; and an increase in Cr and U contents in IF at 2.45 Ga.

    “In the rock record, this event is manifested by a number of changes (see Farquhar et al., 2011, 2014, for reviews), including (1) loss of easily oxidisable detrital uraninite, pyrite, and siderite from fluvial siliciclastic sediments at ca. 2.4 Ga”
  • The Weeli Wolli Formation displays a marked increase in Cr concentrations, interpreted by Konhauser et al. (2011) as a remnant signature of bacterial pyrite oxidation and associated acid rock drainage.

    “The Weeli Wolli Formation displays a marked increase in Cr concentrations, interpreted by Konhauser et al. (2011) as a remnant signature of bacterial pyrite oxidation and associated acid rock drainage.”
  • This process continued perhaps for 150-200 m.y. (the crustal half-life) until the volume of easily oxidisable pyrite in the weathered crust was diminished.

    “This process continued perhaps for 150-200 m.y. the crustal half-life (Garrels and Mackenzie, 1971) - until the volume of easily oxidisable pyrite in the weathered crust was diminished (Konhauser et al., 2011; Bekker and Holland, 2012).”
  • The oolitic and pisolitic Timeball Hill Formation records the highest degree of Cr enrichment among Palaeoproterozoic IF.

    “The oolitic and pisolitic Timeball Hill Formation records the highest degree of Cr enrichment among Palaeoproterozoic IF (Konhauser et al., 2011), which is not surprising considering its shallow-water depositional environment (pro-deltaic to offshore).”

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Authors
Konhauser, K. O., Lalonde, S. V., Planavsky, N. J., Pecoits, E., Lyons, T. W., Mojzsis, S. J., Rouxel, O. J., Barley, M. E., Rosìere, C., Fralick, P. W., Kump, L. R., & Bekker, A.
Affiliations
  • University of Alberta (CA)
  • University of California, Riverside (US)
  • University of Colorado Boulder (US)
  • Ifremer (FR)
  • The University of Western Australia (AU)
  • Pennsylvania State University (US)
  • University of Manitoba (CA)
Corresponding author
Konhauser, Kurt O.
Venue
Nature
Published
2011-10
Volume
478
Issue
7369
Pages
369-373
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2094485738
Cited by
366
References
39
Citations by year
2026: 20 · 2025: 23 · 2024: 21 · 2023: 22 · 2022: 22 · 2021: 36 · 2020: 23 · 2019: 30 · 2018: 25 · 2017: 25 · 2016: 26 · 2015: 25 · 2014: 26 · 2013: 27 · 2012: 13
FWCI
15.06
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
  • HAL (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
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 › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
Keywords
Great Oxidation Event, pyrite oxidation, acid mine drainage, atmospheric oxygenation, continental weathering, chemolithoautotrophic bacteria, Precambrian iron formations, ultramafic rocks
MeSH terms
Bacteria, Aerobic, Chromium, Hydrogen-Ion Concentration, Iron, Oxidation-Reduction, Seawater, Sulfides, Time Factors, Geologic Sediments, Rivers

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