Late archean biospheric oxygenation and atmospheric evolution

Alan J. Kaufman, David T. Johnston, James Farquhar, Andrew L. Masterson, Timothy W. Lyons, Steve Bates, Ariel Anbar, Gail L. Arnold, Jessica Garvin, Roger Buick

Research output: Contribution to journalArticlepeer-review

312 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1900-1903
Number of pages4
Issue number5846
StatePublished - Sep 28 2007

ASJC Scopus subject areas

  • General


Dive into the research topics of 'Late archean biospheric oxygenation and atmospheric evolution'. Together they form a unique fingerprint.

Cite this