Abstract
Bedded barites from the Barberton greenstone belt (South Africa and Swaziland) preserve a comprehensive record of atmospheric, oceanic and microbial processes involved in the formation and evolution of the Paleoarchean (3.6–3.2 Ga) oceanic sulfate reservoir. Here, we report multiplesulfur isotopic compositions from four of these barite occurrences. Relatively constant mass-independent
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