Affiliation:
1. Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA.(J.F.); (H.B.); and (M.T.)
Abstract
Mass-independent isotopic signatures for δ
33
S, δ
34
S, and δ
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.
Publisher
American Association for the Advancement of Science (AAAS)
Reference32 articles.
1. Sulfur Isotopic Composition of Cenozoic Seawater Sulfate
2. Burial of organic carbon and pyrite sulfur in sediments over phanerozoic time: a new theory
3. 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.
4. Sulphate and sulphate reduction in early Precambrian oceans
5. 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.
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