Cited by 912Paleontology and Stratigraphy of FossilsGeological and Geochemical AnalysisAstro and Planetary Science

The DOI matches its Crossref record; 54 of the 54 references it cites were found in a registry or an index.

Mass-Independent Fractionation of Sulfur Isotopes in Archean Sediments: Strong Evidence for an Anoxic Archean Atmosphere

Pavlov, A.A., Kasting, J.F.·2002·Astrobiology

Abstract

Mass-independent fractionation (MIF) of sulfur isotopes has been reported in sediments of Archean and Early Proterozoic Age (> 2.3 Ga) but not in younger rocks. The only fractionation mechanism that is consistent with the data on all four sulfur isotopes involves atmospheric photochemical reactions such as SO2 photolysis. We have used a one-dimensional photochemical model to investigate how the isotopic fractionation produced during SO2 photolysis would have been transferred to other gaseous and particulate sulfur-bearing species in both low-O2 and high-O2 atmospheres. We show that in atmospheres with O2 concentrations < 10(-5) times the present atmospheric level (PAL), sulfur would have been removed from the atmosphere in a variety of different oxidation states, each of which would have had its own distinct isotopic signature. By contrast, in atmospheres with O2 concentrations > or = 10(-5) PAL, all sulfur-bearing species would have passed through the oceanic sulfate reservoir before being incorporated into sediments, so any signature of MIF would have been lost. We conclude that the atmospheric O2 concentration must have been < 10(-5) PAL prior to 2.3 Ga.

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Crossref · 10.1089/153110702753621321

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  1. Ohmoto H., 1997, Geochem. News, 93, 13

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Metadata

Authors
Pavlov, A. A., & Kasting, J. F.
Affiliations
  • University of Colorado Boulder (US)
  • Pennsylvania State University (US)
Venue
Astrobiology
Published
2002-03
Volume
2
Issue
1
Pages
27-41
ISSN
  • 1531-1074 (ISSN-L)
  • 1557-8070
OpenAlex
W2054861741
Cited by
912
References
54
Citations by year
2026: 24 · 2025: 40 · 2024: 39 · 2023: 32 · 2022: 40 · 2021: 44 · 2020: 54 · 2019: 56 · 2018: 67 · 2017: 51 · 2016: 42 · 2015: 41 · 2014: 37 · 2013: 60 · 2012: 44
FWCI
21.93
Type
journal article
Language
en
Open access
closed
Locations
  • Astrobiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geological and Geochemical Analysis
  • Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
Keywords
Archean atmosphere, atmospheric oxygen, photochemical modeling, sulfur cycling, Early Proterozoic
MeSH terms
Archaea, Atmosphere, Molecular Weight, Sulfur Isotopes

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