Nature Geoscience, Published online: 10 June 2026; doi:10.1038/s41561-026-02006-0

Most oceanic intraplate volcanism, including seamounts far from mantle hotspots, originates from deep-rooted mantle plumes, according to a data-constrained numerical simulation of the thermal evolution of the mantle over the past 270 million years.

Nature Geoscience, Published online: 10 June 2026; doi:10.1038/s41561-026-02007-z

Seamount volcanism is more voluminous where seafloor has passed above a large low-shear-velocity province, consistent with mantle plumes being responsible for most oceanic intraplate volcanism, according to an analysis of seamount catalogues.