Roger L. Nielsen

TL;DR: In this article, the authors present a general model for the calculation of equilibrium temperatures and phase relations at a given extent of crystallization or melting in natural magmatic systems based on a set of empirical expressions that describe mineral-melt equilibria for major and trace elements in terms of pressure, temperature, and liquid compositions for systems ranging from primitive basalts to dacites.

TL;DR: In this article, a series of experiments using several different natural composition lavas, doped with the elements of interest, as starting compositions were conducted to calculate expressions that describe REE partitioning as a function of a variety of system parameters.

TL;DR: In this paper, the effects of composition and temperature on the partitioning behavior of Sc, Ni, V, U and Th, and the high field strength elements (HFSE) Zr, Nb, Ta and Hf between magnetite and natural silicate melts were evaluated from doped experiments on natural mafic-to intermediate-composition lavas at 1-atm pressure.

TL;DR: It was found that Sr/Ca ratios in Otolith primordia of fish of known anadromous origin were significantly higher than those in otolith primORDia ofFish of known resident origin, however, variation among samples was associated with differences in chemistry of the freshwater environments.

TL;DR: A self-consistent terminology for partitioning data is presented and it is shown that bulk partition and bulk exchange coefficients are denoted by D and KD, respectively.