Fig. 6: Plot of Δ36S versus Δ33S for Huronian Supergroup samples analyzed in the present study. | Communications Earth & Environment

Fig. 6: Plot of Δ36S versus Δ33S for Huronian Supergroup samples analyzed in the present study.

From: Incomplete oxidative sulfide weathering and low atmospheric oxygen levels during the Great Oxidation Event

Fig. 6: Plot of Δ36S versus Δ33S for Huronian Supergroup samples analyzed in the present study.

The black dotted line (Δ36S/Δ33S = −0.9) represents photochemically induced MIF-S anomalies reported from Archean sulfides, whereas the gray dashed line (Δ36S/Δ33S = −7) shows the variation caused by mass-dependent fractionation processes including microbial sulfate reduction54. The sulfur isotopic compositions of 2.7-Ga pyritic black shales from the Superior Province are also plotted55. The errors for the Δ33S and Δ36S values are ±0.05‰ and ±0.3‰, respectively.

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