Geological sulfur isotopes indicate elevated OCS in the Archean atmosphere, solving faint young sun paradox

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Mass-independent fractionation of sulfur isotopes in Archean sediments: strong evidence for an anoxic Archean atmosphere.

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...

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ژورنال

عنوان ژورنال: Proceedings of the National Academy of Sciences

سال: 2009

ISSN: 0027-8424,1091-6490

DOI: 10.1073/pnas.0903518106