Cu isotopes in marine black shales record the Great Oxidation Event.

  title={Cu isotopes in marine black shales record the Great Oxidation Event.},
  author={Ernest Chi Fru and Nathalie P Rodr{\'i}guez and Camille A Partin and Stefan V Lalonde and Per Andersson and Dominik Jakob Weiss and Abderrazak El Albani and Ilia Rodushkin and Kurt O. Konhauser},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={113 18},
The oxygenation of the atmosphere ∼2.45-2.32 billion years ago (Ga) is one of the most significant geological events to have affected Earth's redox history. Our understanding of the timing and processes surrounding this key transition is largely dependent on the development of redox-sensitive proxies, many of which remain unexplored. Here we report a shift from negative to positive copper isotopic compositions (δ(65)CuERM-AE633) in organic carbon-rich shales spanning the period 2.66-2.08 Ga. We… CONTINUE READING
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