Abstract
MOVEMENT of lithosphere plates over hotspots which are fixed relative to the mantle could explain the origin of island chains and aseismic ridges1–4. Observations of phase velocities against epicentral distances for Tonga–Samoa earthquakes5 show anomalies which can be interpreted as a radial and lateral inhomogeneity in the lower mantle beneath Hawaii. That indicates the possible existence of deep mantle plumes.
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KHAN, M. Dynamic implications of mantle hotspots. Nature 251, 596–597 (1974). https://doi.org/10.1038/251596a0
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DOI: https://doi.org/10.1038/251596a0
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