Evaluating the role of microbial sulfate reduction in the early Archean using quadruple isotope systematics

  title={Evaluating the role of microbial sulfate reduction in the early Archean using quadruple isotope systematics},
  author={Yanan Shen and J. Farquhar and A. Masterson and A. J. Kaufman and R. Buick},
  journal={Earth and Planetary Science Letters},
Abstract Microscopic pyrites with low 34 S/ 32 S ratios in ~ 3.47-Gyr-old sedimentary barites from North Pole, Australia have been interpreted as evidence for microbial sulfate reduction and/or sulfur disproportionation in the early Archean. We show that these microscopic sulfides have similar to slightly less negative Δ 33 S and slightly more negative Δ 36 S values compared to the enclosing sulfate crystals. This finding is consistent with a primary mass-independent signature overprinted by… Expand

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