John A. Philpotts

TL;DR: In this paper, solid-liquid partition coefficients between phenocrysts and the host lavas have been measured for rare-earth elements by an isotope dilution technique and the consistency of much of the data suggests that most of the phenocryst crystallized under equilibrium, or quasi-equilibrium, conditions.

TL;DR: Partition coefficients for K, Rb, Sr, and Ba distributed between plagioclase, K-feldspar, clinopyroxene, orthopyroxenes, mica, hornblende, garnet, and olivine phenocrysts and their igneous matrix materials, have been determined by a mass-spectrometric stable isotope dilution technique.

TL;DR: Some eclogitic and ultrabasic inclusions, their separated minerals, host rocks, and related samples have been analyzed by mass-spectrometric isotope dilution for K, Rb, Sr, Ba and rare-earth elements (RE), and by other techniques for selected major elements as discussed by the authors.

TL;DR: In this article, the equivalence of Eu2+ and Sr interphase partitioning permits the calculation of the Eu 2 and Eu 3+ concentrations in each of any two equilibrated phases of known Sr and rare-earth concentrations.

TL;DR: In this paper, a simple model indicates eclogite or garnet peridotite as the most likely source rocks of alkali and submarine basalts, and the trace element data indicate that plagioclase has had an important effect in modifying composition.