Christopher T Reinhard, Noah J Planavsky, Leslie J Robbins, Camille A Partin, Benjamin C Gill, Stefan V Lalonde, Andrey Bekker, Kurt O Konhauser, Timothy W Lyons

2013/4/2

Proceedings of the National Academy of Sciences

110

14

5357-5362

National Acad Sciences

Abstract The partial pressure of oxygen in Earth's atmosphere has increased dramatically
through time, and this increase is thought to have occurred in two rapid steps at both ends of
the Proterozoic Eon (∼ 2.5–0.543 Ga). However, the trajectory and mechanisms of Earth's
oxygenation are still poorly constrained, and little is known regarding attendant changes in
ocean ventilation and seafloor redox. We have a particularly poor understanding of ocean
chemistry during the mid-Proterozoic (∼ 1.8–0.8 Ga). Given the coupling between redox- ...