Abstract
Basalts from Sao Miguel are displaced to higher 87Sr/86Sr ratios, and have a significantly shallower slope, compared with the main correlation between 143Nd/144Nd and 87Sr/86Sr for most mantle-derived volcanic rocks. Available data on young magmatic rocks indicate that large ionic lithophile (LIL)-element enrichment in the upper mantle involves two readily distinguishable components which reflect different histories.
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Hawkesworth, C., Norry, M., Roddick, J. et al. 143Nd/144Nd and 87Sr/86Sr ratios from the Azores and their significance in LIL-element enriched mantle. Nature 280, 28–31 (1979). https://doi.org/10.1038/280028a0
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DOI: https://doi.org/10.1038/280028a0
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