Uranium isotopes serve as key tool in reconstructing ancient paleoxygenation conditions, especially when dealing with global anoxic events. By analyzing the relative abundance of uranium isotopes in carbonates, it is possible to infer oxygen levels in ancient oceans. This shed light on the evolution of marine ecosystems and global biogeochemical cycles over geological timescales, offering a window into Earth's past, and enhancing our understanding of key environmental processes and their implications for life throughout history.

Peer-reviewed publications:

Remírez, M., Gilleaudeau, G., Gan, T., Kipp, M. A., Tissot, F. L., Kaufman, A. J., Parente, M., 2024. Carbonate uranium isotopes record global expansion of marine anoxia during the Toarcian Oceanic Anoxic Event. Proceedings of the National Academy of Sciences, 121(27), e2406032121.

Rutledge, R.,  Gilleaudeau, G., Remírez, M., Kaufman, A. J., Lyons, T., Bates, S., Algeo, T., 2024. Productivity and organic carbon loading control uranium isotope behavior in ancient reducing settings: Implications for the paleoredox proxy. Geochimica et Cosmochimica Acta, 368, 197-213.

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