A Whiff of Oxygen Before the Great Oxidation Event?

@article{Anbar2007AWO,
  title={A Whiff of Oxygen Before the Great Oxidation Event?},
  author={Ariel D. Anbar and Yun Duan and Timothy W Lyons and Gail Lee Arnold and Brian Kendall and Robert A. Creaser and Alan J Kaufman and Gwyneth W Gordon and Clint Scott and Jessica Garvin and Roger Buick},
  journal={Science},
  year={2007},
  volume={317},
  pages={1903 - 1906}
}
High-resolution chemostratigraphy reveals an episode of enrichment of the redox-sensitive transition metals molybdenum and rhenium in the late Archean Mount McRae Shale in Western Australia. Correlations with organic carbon indicate that these metals were derived from contemporaneous seawater. Rhenium/osmium geochronology demonstrates that the enrichment is a primary sedimentary feature dating to 2501 ± 8 million years ago (Ma). Molybdenum and rhenium were probably supplied to Archean oceans by… Expand
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Findings indicate that euxinic conditions may have been common on a variety of spatial and temporal scales both before and immediately after the Paleoproterozoic rise in atmospheric oxygen, hinting at previously unexplored texture and variability in deep ocean chemistry during Earth’s early history. Expand
Selenium isotopes record extensive marine suboxia during the Great Oxidation Event
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