Influence of sulfate reduction rates on the Phanerozoic sulfur isotope record.

@article{Leavitt2013InfluenceOS,
  title={Influence of sulfate reduction rates on the Phanerozoic sulfur isotope record.},
  author={William D. Leavitt and I Halevy and Alexander S Bradley and David T. Johnston},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2013},
  volume={110 28},
  pages={11244-9}
}
Phanerozoic levels of atmospheric oxygen relate to the burial histories of organic carbon and pyrite sulfur. The sulfur cycle remains poorly constrained, however, leading to concomitant uncertainties in O2 budgets. Here we present experiments linking the magnitude of fractionations of the multiple sulfur isotopes to the rate of microbial sulfate reduction. The data demonstrate that such fractionations are controlled by the availability of electron donor (organic matter), rather than by the… CONTINUE READING

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