Origin of sulfate in post-snowball-Earth oceans: river inputs vs. shelf-derived HS.

Natl Sci Rev

International Center for Isotope Effects Research, Nanjing University, China.

Published: November 2024

A synthesis of global barite sulfate isotope data from approximately 635 million years ago, at the end of a global glaciation, undermines the hypothesis that river sulfate was the primary carrier of the distinctive 17O-depleted atmospheric O2 signature of the time. Instead, an aqueous H2S oxidation model on the shelf emerges as a compelling alternative, though it demands extensive validation across multiple fronts by the scientific community.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11565228PMC
http://dx.doi.org/10.1093/nsr/nwae380DOI Listing

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