Lithium isotopes in global mid-ocean ridge basalts

  title={Lithium isotopes in global mid-ocean ridge basalts},
  author={Paul B. Tomascak and Charles H. Langmuir and Petrus J. le Roux and Steven B. Shirey},
The lithium isotope compositions of 30 well-characterized samples of glassy lavas from the three major mid-ocean ridge segments of the world, spanning a wide range in radiogenic isotope and elemental content and sea floor physical parameters, have been measured. The overall data set shows a significant range in dLi (+1.6 to +5.6), with no global correlation between Li isotopes and other geochemical or tectonic parameters. The samples with the greatest lithophile element depletion (NMORB: K2O… CONTINUE READING
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