N. M. Evensen

TL;DR: In this article, 15 chondrites, including eight carbonaceous chondites, were analyzed for rare earth element abundances by isotope dilution, and the persistence of anomalies in chondritic materials relatively removed from direct condensational processes implies that anomalous components were introduced at a late stage of chondrite formation.

TL;DR: In this article, a strong negative correlation exists between 87Sr/86Sr ratios in oceanic basalt from Iceland and the Reykjanes Ridge, but such a clear correlation does not exist for samples from the Hawaiian Islands.

TL;DR: A simple two-reservoir model with time-dependent transport coefficients between the reservoirs has been used to model the abundances of K, Ar, Rb, Sr, Sm, Nd, U, Th, and Pb in the earth's mantle and continental crust as discussed by the authors.

TL;DR: In this article, REE and selected minor and trace elements are compared for present-day volcanic rocks in the Scotia Sea and the results indicate derivation of at least some87Sr from subducted ocean crust.

TL;DR: The measurement of Pb, Nd and Sr isotopes in basalt glasses from mid-ocean ridges reveals correlations in isotope parameters which have important implications for the differentiation history of the mantle as mentioned in this paper.