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Sulfur Isotopes in Swaziland System Barites and the Evolution of the Earth's Atmosphere

Eugene C. Perry, Jr., Jan Monster, and Thomas ReimerAuthors Info & Affiliations
Science
12 Mar 1971
Vol 171, Issue 3975
pp. 1015-1016
DOI: 10.1126/science.171.3975.1015
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Abstract

Sedimentary barites from the Swaziland System of South Africa (more than 3000 million years old) have sulfur-34 ratios that are enriched by only 2.5 per mil with respect to contemporary sulfides. To explain this small fractionation, it is proposed that oxygen pressure in the earth's atmosphere was very low and that local oxidation occurred in a photosynthetic layer of the ocean.

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Published In

Science
Volume 171 | Issue 3975
12 March 1971

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© 1971.

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Published in print: 12 March 1971

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Authors

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Eugene C. Perry, Jr.
Minnesota Geological Survey, University of Minnesota, Minneapolis 55455
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Jan Monster
McMaster University, Hamilton, Ontario, Canada
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Thomas Reimer
University of the Witwatersrand, Johannesburg, South Africa
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  • Eugene C. Perry, Jr. et al.
,
Sulfur Isotopes in Swaziland System Barites and the Evolution of the Earth's Atmosphere.Science171,1015-1016(1971).DOI:10.1126/science.171.3975.1015

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