Fig. 4: Simulations of the crustal memory effect (CME) within a hypothetical partially hydrographically restricted basin adjacent to the Pilbara Craton.
From: Reconciling discrepant minor sulfur isotope records of the Great Oxidation Event
a Here, the blue line indicates the simulated ∆33S evolution of the Pilbara-specific weathering flux, with its associated envelope capturing the 1σ uncertainty. Superimposed on these, the available Pilbara-derived ∆33S data are plotted in blue, while those from the Turee Creek Group are distinguished as red open symbols32. The vertical dashed line marks the Great Oxidation Event(GOE) sensu Luo et al.22, while the horizontal dashed line represents the globally expressed CME modelled using the CA dataset (Fig. 3b). The 2500–2000 Ma expansion (insert) follows (a). b Core-specific density distributions of the ∆33S data from the Boolgeeda Iron Formation and Turee Creek Group32, younging from left to right (i.e., cores T1→T3). The horizontal blue line and envelope follow (a).
