ArticleNational science review2026
Water-induced mantle overturn explains high Archean paleointensities.
Article in National science review, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Xenon isotopes reveal a geomagnetic prelude to Earth's oxygenation.National science review · 2026Article
- A mantle assist for the early geodynamo and planetary shielding.National science review · 2026Article
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2 authors.
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Abstract
As a consequence of the evolution of the water-bearing basal magma ocean, water-induced mantle overturn can suitably explain many puzzling observations in the Archean, including the formation of continents and the Archean-Proterozoic boundary. The upwelling of the hot basal magma ocean during mantle overturn drastically affects the thermal state of the core-mantle boundary and geomagnetic field. We model the thermal evolution of the core-mantle boundary to investigate the effects of mantle overturn on the geomagnetic field. Our results demonstrate that mantle overturn substantially accelerates core cooling and increases heat flow across the core-mantle boundary. Such enhanced heat flow would have strengthened the geomagnetic field, which explains well the high paleointensity records from ∼3.5 to 2.5 Ga. The strong geodynamo and formation of Archean continents generate a concordant picture of the evolution of water-induced mantle overturn.
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