Abstract
The Ninetyeast Ridge hotspot track displays strontium, neodymium and lead isotope variations over time that reflect simple radioactive decay in the plume source rather than a change in the mantle components present. The lead isotope variations indicate that the time spent by the plume source in a non-convecting mantle boundary layer was only a few hundreds of millions of years, contrary to the conventional view of individual plume sources as old (1–3 Gyr) or persistent features.
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Class, C., Goldstein, S., Galer, S. et al. Young formation age of a mantle plume source. Nature 362, 715–721 (1993). https://doi.org/10.1038/362715a0
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DOI: https://doi.org/10.1038/362715a0
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