Partition coefficients for olivine-melt and orthopyroxene-melt systems

The effect of melt composition on mineral-melt partition coefficients: The case of beryllium

“…Figure 5a illustrates the positive correlations between three such elements (M = Ni, Co and Mn) and Mg. Although the data available to Beattie et al (1991) suggested that Ca would also belong in this group of elements, the wider range of melt compositions encompassed by Libourel (1999) and the present study indicates that no correlation exists between D Mg and D Ca , as illustrated in Fig. 5b.…”

“…On the basis that the exchange M 2+ melt + Mg 2+ olivine = M 2+ olivine + Mg 2+ melt implies a dependence on the activity of Mg 2+ in the melt, several studies have parameterised on the basis of D Mg or used the exchange coefficient Colson et al, 1988;Beattie et al, 1991). The success of this approach relies on M 2+ behaving in a similar way to Mg 2+ .…”

Trace element partitioning in plagioclase feldspar

“…Beattie et al, 1991;Blundy et al, 1996;Wood and Blundy, 1997;Gaetani, 2004). However, despite the con- Fig.…”

Recycled crust in the Galápagos Plume source at 70 Ma: Implications for plume evolution

“…The model has the following components: 1) identification of a primary magma composition, 2) calculation of a liquid line of descent after variable proportions of olivine, clinopyroxene, and plagioclase have been subtracted, 3) calculation of the compositions of olivine that crystallize from these derivative magmas, 4) comparison of model and observed olivine compositions. The modeling requires use of the olivine/melt distribution coefficients D; for Ni we have chosen the Beattie-Jones model (Jones, 1984;Beattie et al, 1991); for Ca and Mn we use the models in Herzberg and O'Hara (2002) and for Fe-Mg exchange between olivine and melt we use the model of Toplis (2005). There are other olivine/liquid distribution models for Ni, and all are parameterizations of experimental data.…”