ArticleNature communications2026
Phanerozoic seawater Mg/Ca variations driven by supercontinent cycles.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
1 citing paper in PubMed.
- Phanerozoic seawater Mg/Ca variations driven by supercontinent cycles.Nature communications · 2026Article
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Authors and funding
5 authors.
Funding
Abstract
Seawater Mg/Ca has oscillated markedly over the Phanerozoic, closely associated with secular variations in sedimentation, icehouse-greenhouse fluctuations, and the evolution of calcifying invertebrates. However, the drivers of these long-term oscillations remain unresolved. Here, we develop an inverse model that couples seawater Mg concentration and Mg isotope composition variations. By exploiting the contrasting Mg isotopic fractionation associated with Mg-silicate formation and dolomitization, this model quantifies the major marine Mg sinks. Model results show that increases in seawater Mg/Ca during supercontinent assembly were explained by reduced rates of silicate alteration and dolomitization. In contrast, decreases in seawater Mg/Ca during periods of supercontinent stasis and early breakup were driven by intensified Mg-silicate formation and dolomitization. Variations in marine Mg-silicate and dolomite formation were further regulated by seafloor spreading, continental configuration, and climate throughout the supercontinent cycle. Together, our results identify the supercontinent cycle as a first-order regulator of Phanerozoic seawater Mg/Ca through its control on marine Mg-silicate and dolomite fluxes.
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Registered trials
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