Patterns of sulfur isotope fractionation during microbial sulfate reduction.

  title={Patterns of sulfur isotope fractionation during microbial sulfate reduction.},
  author={Alexander S Bradley and William D. Leavitt and Marian L. Schmidt and Andrew H Knoll and Peter R. Girguis and David T. Johnston},
  volume={14 1},
Studies of microbial sulfate reduction have suggested that the magnitude of sulfur isotope fractionation varies with sulfate concentration. Small apparent sulfur isotope fractionations preserved in Archean rocks have been interpreted as suggesting Archean sulfate concentrations of <200 μm, while larger fractionations thereafter have been interpreted to require higher concentrations. In this work, we demonstrate that fractionation imposed by sulfate reduction can be a function of concentration… CONTINUE READING
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