Abstract
The Pb, Sr, Nd isotopic composition in North Atlantic mid-oceanic ridge basalts has been measured. A positive correlation is found between Sr and Pb and a negative one between Nd and Sr. There is also a negative correlation between Hf/Th or Ta/Th and isotopic ratios such as 87Sr/86Sr or 206Pb/204Pb. Using the data for oceanic island basalts with these coherent geochemical characteristics we discuss the origin of chemical variations in the North Atlantic mantle and the problem of the mantle geochemistry.
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Dupré, B., Allègre, C. Pb–Sr–Nd isotopic correlation and the chemistry of the North Atlantic mantle. Nature 286, 17–22 (1980). https://doi.org/10.1038/286017a0
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DOI: https://doi.org/10.1038/286017a0
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