Insights into the dynamics of mantle plumes from uranium-series geochemistry

Article Abstract:

A study shows that the uranium-series disequilibria measured in hotspot lavas indicate that hotspots are associated with hot and buoyant upwellings and the weaker hotspots such as Iceland and the Azores are characterized by lower excess temperatures than stronger hotspots such as Hawaii. The results have shown that U-series data in ocean island lavas provide constraints on mantle upwelling velocity, mantle temperatures and the horizontal length scale of mantle upwelling.

Plumes (Fluid dynamics), Lava, Geochemical research

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Through thick and thin

Article Abstract:

The rejuvenation model and the dynamic support model that describes the origin of Hawaiian swell are presented. New seismic evidence suggests that the upraised swell is partly due to heating and thinning of lithosphere beneath.

Seismic prospecting, Seismic surveying

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Rejuvenation of the lithosphere by the Hawaiian plume

Article Abstract:

Various models have been proposed to explain the generating mechanism of the Hawaiian swell. The rejuvenation model is operative within the larger-scale topographic swell where the plume thins the lithosphere.

Causes of

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