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An Archaean oxygen oasis

The first of two stepwise increases in atmospheric oxygen occurred at the end of the Archaean eon. Analyses of sulfur and iron isotopes in pyrite reveal a near-shore environment that hosted locally oxygenated conditions in the Mesoarchaean era.

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Fig. 1: A microbial mat in Little Ambergris Cay, Turks and Caicos, British Overseas Territories.


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Correspondence to Maya L. Gomes.

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Gomes, M.L. An Archaean oxygen oasis. Nature Geosci 11, 84–85 (2018).

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