Late Archean biospheric oxygenation and atmospheric evolution.

Abstract

High-resolution geochemical analyses of organic-rich shale and carbonate through the 2500 million-year-old Mount McRae Shale in the Hamersley Basin of northwestern Australia record changes in both the oxidation state of the surface ocean and the atmospheric composition. The Mount McRae record of sulfur isotopes captures the widespread and possibly permanent activation of the oxidative sulfur cycle for perhaps the first time in Earth's history. The correlation of the time-series sulfur isotope signals in northwestern Australia with equivalent strata from South Africa suggests that changes in the exogenic sulfur cycle recorded in marine sediments were global in scope and were linked to atmospheric evolution. The data suggest that oxygenation of the surface ocean preceded pervasive and persistent atmospheric oxygenation by 50 million years or more.

2 Figures and Tables

01020302008200920102011201220132014201520162017
Citations per Year

142 Citations

Semantic Scholar estimates that this publication has 142 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@article{Kaufman2007LateAB, title={Late Archean biospheric oxygenation and atmospheric evolution.}, author={Alan Jay Kaufman and David T. Johnston and James F. Farquhar and Andrew L. Masterson and Timothy W . Lyons and Steve M. Bates and Ariel D. Anbar and Gail L. Arnold and Jessica Garvin and Roger Buick}, journal={Science}, year={2007}, volume={317 5846}, pages={1900-3} }