Cited by 1,805Paleontology and Stratigraphy of FossilsGeological and Geochemical AnalysisGeochemistry and Elemental Analysis

Atmospheric Influence of Earth's Earliest Sulfur Cycle

Farquhar, James, Bao, Huiming, Thiemens, Mark·2000·Science

Abstract

Mass-independent isotopic signatures for delta(33)S, delta(34)S, and delta(36)S from sulfide and sulfate in Precambrian rocks indicate that a change occurred in the sulfur cycle between 2090 and 2450 million years ago (Ma). Before 2450 Ma, the cycle was influenced by gas-phase atmospheric reactions. These atmospheric reactions also played a role in determining the oxidation state of sulfur, implying that atmospheric oxygen partial pressures were low and that the roles of oxidative weathering and of microbial oxidation and reduction of sulfur were minimal. Atmospheric fractionation processes should be considered in the use of sulfur isotopes to study the onset and consequences of microbial fractionation processes in Earth's early history.

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Crossref · 10.1126/science.289.5480.756

Cites

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  • Δ33S isotopic values can be used to determine whether sulfate aerosol formation occurred in the stratosphere since UV photochemical reactions generate MIF and non-zero Δ33S.

    “Δ³³S isotopic values can be used to determine whether sulfate aerosol formation occurred in the stratosphere (i.e., above the ozone layer) since UV photochemical reactions generate MIF and non-zero Δ³³S 40,122-124 .”
  • The strongest constraint on Archean atmospheric composition is that the ground-level mixing ratio of O2 was <10−6 PAL or <0.2 ppmv O2 for air of 1 bar, indicated by the presence of sulfur isotope MIF in Archean sedimentary minerals.

    “The strongest constraint on Archean atmospheric composition is that the ground-level mixing ratio of O2 was <10−6 PAL (present atmospheric level) or <0.2–parts per million by volume (ppmv) O2 for air of 1 bar, indicated by the presence of sulfur isotope MIF (S-MIF) in Archean sedimentary minerals (Fig. 2A) (44, 47).”

    From The Archean atmosphere (2020) · cites this paper as [47]

  • Production and preservation of non-mass-dependent sulfur isotope anomalies in Archean and earliest Paleoproterozoic sedimentary rocks indicate that atmospheric pO2 was maintained at extremely low values, likely below approximately 10^-7 PAL, for most of Archean time.

    “However, the production and preservation of non-mass-dependent sulfur isotope anomalies (NMD-S) in Archean and earliest Paleoproterozoic sedimentary rocks indicate that atmospheric pO 2 was maintained at extremely low values, likely below ∼10 -7 PAL, for most of Archean time (Farquhar et al. 2000, Pavlov & Kasting 2002, Zahnle et al. 2006) (Figure 3a).”

    From The History of Ocean Oxygenation (2022) · cites this paper as Farquhar et al. 2000

  • Before ~2.45 billion years ago, Earth's atmosphere was essentially devoid of molecular oxygen.

    “whereas geologic and geochemical constraints suggest that before ~2.45 billion years ago (Ga), the atmosphere was essentially devoid of this gas (1–4).”
  • Mass-independent fractionation of sulfur isotopes is thought to originate from photolysis and/or photoexcitation of volcanogenic SO2 by ultraviolet light in an anoxic atmosphere.

    “Mass-independent fractionation of sulfur isotopes (S-MIF) is thought to originate from the photolysis and/or photoexcitation of volcanogenic SO2 by ultraviolet light in an anoxic atmosphere (1, 20–23).”

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Research works printed but not linked: 6

  1. P. Brimblecombe C. Hammer H. Rodhe A. Ryaboshapko C. F. Boutron in Evolution of the Global Biogeochemical Sulphur Cycle P. Brimblecombe and A. Y. Lein Eds. (Wiley New York 1989) pp. 77–121.
  2. I. B. Lambert and T. H. Donelly in Early Organic Evolution: Implications for Mineral and Energy Resources M. G. Schidlowski S. Golubic M. M. Kimberly D. M. McKirdy P. A. Trudinger Eds. (Springer-Verlag New York 1992) pp. 408–415.
  3. J. F. Kasting H. D. Holland L. R. Kump in The Proterozoic Biosphere: A Multidisciplinary Study J. W. Schopf and C. Klein Eds. (Cambridge Univ. Press New York 1992) pp. 159–163.
  4. H. Bao et al. Nature in press.
  5. T. B. Moore and J. W. Schopf in The Proterozoic Biosphere: A Multidisciplinary Study J. W. Schopf and C. Klein Eds. (Cambridge Univ. Press New York 1992) pp. 605–694.
  6. Supported by grants from NSF NASA and Calspace. Samples used in this study were supplied and/or collected by J. W. Schopf B. Runnegar D. Lowe H. Baadsgaard and S. J. Mojzsis. The interpretations herein are our responsibility but they have benefited from interesting conversations and questions from R. N. Clayton K. Boering T. Chacko D. DePaolo H. D. Holland M. Humayun J. Kasting A. Knoll S. J. Mojzsis A. Payton G. Retallack and K. K. Turekian. We thank D. Canfield and J. Kasting for providing copies of in press and unpublished materials.

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Authors
Farquhar, J., Bao, H., & Thiemens, M.
Affiliations
University of California San Diego (US)
Venue
Science
Published
2000-08-04
Volume
289
Issue
5480
Pages
756-758
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2081383679
Cited by
1,805
References
25
Citations by year
2026: 70 · 2025: 91 · 2024: 76 · 2023: 70 · 2022: 84 · 2021: 99 · 2020: 98 · 2019: 105 · 2018: 117 · 2017: 98 · 2016: 69 · 2015: 74 · 2014: 70 · 2013: 96 · 2012: 81
FWCI
28.74
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • Civil War Book Review (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords
sulfur cycling, sulfur isotopes, Precambrian, oxidative weathering, microbial sulfur cycling, sulfide, sulfate, early Earth atmosphere, Precambrian rocks

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