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Measurements of K, Rb, U, Sr and Pb in diamonds containing inclusions

Nature volume 252, pages 35–37 (1974)Cite this article

Abstract

KNOWLEDGE of the Pb and Sr isotopic compositions of syngenetic inclusions in diamonds is important for several reasons. As diamonds probably crystallised at depths of more than 100 km, the isotopic data may provide constraints on the mode of the geochemical evolution of the Earth. It may also be possible to test assumed U/Pb ratios (U/Pb=μ) for the mantle and to estimate the age of particular diamonds. Diamonds are particularly appropriate for these studies because, in contrast to kimberlites and their associated nodules, any contamination by crustal material can be overcome by washing in acid.

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Authors and Affiliations

  1. Bernard Price Institute of Geophysical Research, University of the Witwatersrand, Johannesburg, South Africa

    H. J. WELKE & H. L. ALLSOPP

  2. De Beers Industrial Diamond Division Ltd, Johannesburg, South Africa

    J. W. HARRIS

Authors
  1. H. J. WELKE
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  2. H. L. ALLSOPP
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  3. J. W. HARRIS
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WELKE, H., ALLSOPP, H. & HARRIS, J. Measurements of K, Rb, U, Sr and Pb in diamonds containing inclusions. Nature 252, 35–37 (1974). https://doi.org/10.1038/252035a0

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