Fig. 2: Geochemical data profiles for the studied succession from the lower part of Taishir Formation at Tsagaan Gorge. | Nature Communications

Fig. 2: Geochemical data profiles for the studied succession from the lower part of Taishir Formation at Tsagaan Gorge.

From: Ocean deoxygenation after the Sturtian Snowball

Fig. 2

Sequence stratigraphy is from ref. 98. Lithostratigraphy, δ13Ccarb and 87Sr/86Sr data (circles) are from ref. 11. 87Sr/86Sr data (squares) of ref. 12 are correlated based on the age model of ref. 9. The Precambrian I/(Ca+Mg) baseline is from ref. 99. Estimation of seawater sulfate δ34S is from ref. 47. The mean δ66Zn value of the modern deep ocean is from ref. 53 and the mean δ238U value of Bahamian carbonates is from ref. 100. The shaded band highlights the lower part of the succession. Note that I/(Ca+Mg) values below the detection limit are regarded as zero, and errors for some measurements of δ238U are smaller than the data symbols.

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