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February 25, 2026Journal of the Geological Society0 citationsOpen Access

Mantle Plume Activity in the Mirovoi Ocean: Evidence from North Wales

Mantle plume activity in the Mirovoi ocean: evidence from accreted oceanic slices in North Wales

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Authors

PSPiero A. B. de SampaioLDLuc S. DoucetZLZheng- Xiang Li

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Overview

Multidisciplinary research reveals plume activity and geochemical evolution in Neoproterozoic oceanic basalts from North Wales, suggesting a link to ancient tectonic processes.

Key Points

  • The research aims to investigate the composition and origin of Neoproterozoic oceanic basalts in North Wales to understand mantle plume activity.
  • Field studies of Neoproterozoic oceanic basalts
  • Petrographic and geochemical analysis of rock samples
  • Petrogenetic modelling to link basalt sources
  • Monte Carlo simulations to assess plume activity and lithospheric thickness
  • Petrogenetic modelling links basalts to a common source influenced by mantle plumes.
  • Isotopic data indicate a depleted mantle source correlated with Pb isotopic ratios.
  • Evidence suggests plume activity occurred between 655–590 Ma.
  • Findings indicate the seamounts likely originated from the Mirovoi super-ocean rather than the Iapetus Ocean.

Cite This Study

Sampaio et al. (2026) studied this question.

synapsesocial.com/papers/699e927bf5123be5ed05036ahttps://doi.org/10.1144/jgs2025-158
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