Cited by 1,243Paleontology and Stratigraphy of FossilsGeochemistry and Elemental AnalysisGeological and Geochemical Analysis

A new model for Proterozoic ocean chemistry

Canfield, D. E.·1998·Nature

Integrity signals

Registry

Crossref · 10.1038/24839

Cites

29 of 29 references verified0 citation errors · 0 not checkable

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  • Protracted anoxia fundamentally challenged the previous assumption that the full ocean was O2-rich during the boring billion based on the disappearance of anoxia-dependent iron formations at ~1.8 Ga.

    “First and foremost, protracted anoxia fundamentally challenged the previous assumption that the full ocean was O2-rich during the boring billion (Wilde, 1987; Canfield, 1998) based on the disappearance of anoxia-dependent iron formations at ∼1.8 Ga (Fe is soluble only in O2-free waters).”
  • Reconciling the disappearance of iron formations with prolonged anoxia led to the idea that accumulation of hydrogen sulfide (H2S) was responsible for the loss of iron formations at the start of the boring billion.

    “Reconciling the disappearance of iron formations with prolonged anoxia led instead to the idea that accumulation of hydrogen sulfide (H2S) was responsible for the loss of iron formations at the start of the boring billion (Canfield, 1998).”
  • The upper estimate of 40% PAL was grounded in maximum levels of O2 in the atmosphere that would have allowed the deep ocean to remain anoxic.

    “The upper estimate of 40% PAL was grounded in something entirely different—maximum levels of O2 in the atmosphere that would have allowed the deep ocean to remain anoxic (Canfield, 1998)”
  • The claim of persistent deep-ocean anoxia during the boring billion has gained a strong footing through detailed analysis of fine-grained sedimentary rocks and the use of well-established geochemical tracers.

    “The aforementioned claim of persistent deep-ocean anoxia during the boring billion (Canfield, 1998) has gained a strong footing through detailed analysis of fine-grained sedimentary rocks and the use of well-established geochemical tracers.”
  • With the Great Oxidation Event, increasing amounts of sulfate would have been weathered into the ocean and utilized by anaerobic microbes as an electron acceptor to oxidize organic carbon (in anaerobic respiration) with the concomitant production of sulfide.

    “With the Great Oxidation Event, increasing amounts of sulfate (SO42-) would have been weathered into the ocean and utilized by anaerobic microbes as an electron acceptor to oxidize organic carbon (in anaerobic respiration) with the concomitant production of sulfide (H2S) (Canfield, 1998).”

    From The Astrobiology Primer v2.0 (2016) · cites this paper as Canfield, 1998

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Authors
Canfield, D. E.
Affiliations
University of Southern Denmark (DK)
Corresponding author
Canfield, D. E.
Venue
Nature
Published
1998-12
Volume
396
Issue
6710
Pages
450-453
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1631820701
Cited by
1,243
References
29
Citations by year
2026: 31 · 2025: 39 · 2024: 33 · 2023: 39 · 2022: 44 · 2021: 61 · 2020: 58 · 2019: 49 · 2018: 57 · 2017: 64 · 2016: 65 · 2015: 58 · 2014: 42 · 2013: 58 · 2012: 57
FWCI
13.72
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Statens Naturvidenskabelige Forskningsrad
  • Danmarks Grundforskningsfond
  • National Science Council
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, banded iron formations, sulfide, sulfate reduction, sulfur isotopes, anoxic bottom water, animal evolution

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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.

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