Extended Data Fig. 5: Comparison of the δ15N values of BIFs (triangles) and theoretical curves of metamorphic N devolatilization calculated by Rayleigh fractionation modeling. | Nature Geoscience

Extended Data Fig. 5: Comparison of the δ15N values of BIFs (triangles) and theoretical curves of metamorphic N devolatilization calculated by Rayleigh fractionation modeling.

From: A seawater oxygen oscillation recorded by iron formations prior to the Great Oxidation Event

Extended Data Fig. 5: Comparison of the δ15N values of BIFs (triangles) and theoretical curves of metamorphic N devolatilization calculated by Rayleigh fractionation modeling.The alternative text for this image may have been generated using AI.

Temperature is set at 250 °C for Panel (a) and 400 °C for panel (b) (see Methods). 2σ error bars of the data are smaller than the symbols and thus not shown.

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