Equilibrated Nd–unequilibrated Sr isotopes in mantle xenoliths

  title={Equilibrated Nd–unequilibrated Sr isotopes in mantle xenoliths},
  author={Emil Jagoutz and Richard W Carlson and Gunter W. Lugmair},
Isotopic analyses of mantle xenoliths transported to the surface by alkali basalt eruptions complement data obtained from studying basic magmas. These xenoliths also enable mantle characteristics to be examined before they have been affected by the fractionation processes which occur during magma genesis. The data on ultramafic nodules demonstrate Sr isotopic disequilibrium between mineral phases within a single xenolith1–5. This suggests that isotopic disequilibrium on a grain-size scale may… CONTINUE READING

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