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Sr and Nd isotope geochemistry of oceanic basalts and mantle evolution

Nature volume 296, pages 821825 (29 April 1982) | Download Citation

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Abstract

Sr and Nd isotope ratios are reported for 17 mid-ocean ridge basalts and for 11 oceanic islands and island groups. Data from the Azores, Samoa and the Society Islands diverge significantly from the mantle array. These results are not explained by binary mixing of depleted and undepleted mantle reservoirs or by variable magmatic depletion of a planetary reservoir, but support mantle evolution models involving re-injection of crust material into the mantle.

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Affiliations

  1. Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd NW, Washington DC 20015, USA

    • W. M. White
    •  & A. W. Hofmann
  2. Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado 80401, USA

    • W. M. White
  3. Max-Planck-Institut für Chemie, Postfach 3060, 6500 Mainz, FRG

    • W. M. White
    •  & A. W. Hofmann
  4. Present address: Max-Planck-Institut für Chemie, Postfach 3060, 6500 Mainz, FRG.

    • W. M. White
    •  & A. W. Hofmann

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https://doi.org/10.1038/296821a0

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