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Deglacial volcanism and reoxygenation in the aftermath of the Sturtian Snowball Earth

Abstract.

"The Cryogenian Sturtian and Marinoan Snowball Earth glaciations bracket a nonglacial interval during which Demosponge and green-algal biomarkers first appear. To understand the relationships between environmental perturbations and early animal evolution, we measured sulfur and mercury isotopes from the Datangpo Formation from South China. Hg enrichment with positive Δ199Hg excursion suggests enhanced volcanism, potentially due to depressurization of terrestrial magma chambers during deglaciation. [...]".

 

Source: Science Advances
Authors: Menghan Li et al.
DOI: 10.1126/sciadv.adh9502

Read the full article here.


9/13/23 paleoceanography reoxygenation volcanism

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