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Anoxic photo-oxidation of Mn(II)-bearing carbonates on Mars and early Earth
Summary
Proceedings of the National Academy of Sciences, Volume 123, Issue 20, May 2026. SignificanceManganese oxides are important redox catalysts in planetary (bio)geochemical cycles and have long been interpreted as proxies for the rise of atmospheric oxygen on early Earth. While pure MnCO3is photoactive under ultraviolet (UV) irradiation,...
Proceedings of the National Academy of Sciences, Volume 123, Issue 20, May 2026. SignificanceManganese oxides are important redox catalysts in planetary (bio)geochemical cycles and have long been interpreted as proxies for the rise of atmospheric oxygen on early Earth. While pure MnCO3is photoactive under ultraviolet (UV) irradiation,...