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Mo-Cr isotope evidence for a reducing Archean atmosphere in 3.46-2.76Ga black shales from the Pilbara, Western Australia

Wille, Martin; Nebel, Oliver; Van Kranendonk, Martin; Schoenberg, Ronny; Kleinhanns, Ilka C.; Ellwood, Michael


The distribution of redox-sensitive elements and their stable isotope variations in marine sediments has been employed to track the possible oxygenation of the atmosphere at, and before, the Great Oxidation Event (GOE; 2.4-2.2. Ga). Contrasting datasets have been used to advocate for and against the rise of free oxygen in the atmosphere prior to 2.4. Ga based on various geochemical tracers, and evidence for a partially oxidized environment remains elusive.Herein, we present stable isotope...[Show more]

CollectionsANU Research Publications
Date published: 2013
Type: Journal article
Source: Chemical Geology
DOI: 10.1016/j.chemgeo.2012.12.018


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