CA Partin, A Bekker, NJ Planavsky, CT Scott, BC Gill, C Li, V Podkovyrov, A Maslov, KO Konhauser, SV Lalonde, GD Love, SW Poulton, TW Lyons

2013/5/31

Earth and Planetary Science Letters

369

284-293

Elsevier

The atmosphere–ocean system experienced a progressive change from anoxic to more
oxidizing conditions through time. This oxidation is traditionally envisaged to have occurred
as two stepwise increases in atmospheric oxygen at the beginning and end of the
Proterozoic Eon. Here, we present a study of the redox-sensitive element, uranium, in
organic-rich shales to track the history of Earth's surface oxidation at an unprecedented
temporal resolution. Fluctuations in the degree of uranium enrichment in organic-rich ...