Atmospheric influence of Earth's earliest sulfur cycle

@article{Farquhar2000AtmosphericIO,
  title={Atmospheric influence of Earth's earliest sulfur cycle},
  author={Farquhar and Bao and Thiemens},
  journal={Science},
  year={2000},
  volume={289 5480},
  pages={
          756-9
        }
}
Mass-independent isotopic signatures for delta(33)S, delta(34)S, and delta(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… Expand
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