Scandium partitioning

Glassley, W. E. Piper, D. Z. (1978) Cobalt and scandium partitioning versus iron content for crystalline phase in ultramafic nodules. Earth Planet. Sci. Lett., 39, 173-8. 

With these parameters, is 10% greater than Dsc- Although values of the scandium partition coefficient of up to 0.5 have been reported, values in the range 0.1 -0.2 are appropriate for the mantle solidus (Taura et al., 1998 McDade et al., 2003b). Given Dsc, partition coefficients for the other 3+ ions can be obtained using their sixfold radii and the expression... 

Fe but also hosts the lanthanides, U, and Th" . Van Westrenen et al. (2001a) present a model of lanthanide and scandium partitioning between the garnet X-site and melt. These authors fitted the lattice strain model to a large number of data and derived the following expressions for and ... 

Orthopyroxene partitions nickel, cobalt, and manganese less than olivine and there are no clear correlations amongst these elements. Although low in abundance, orthopyroxene can be a significant reservoir for the trivalent cations vanadium, scandium plus tetravalent titanium, due to its high modal abundance, especially in depleted xenoliths with little or... 

Principal experimental data on spinel-melt partitioning are those of Nielsen et al. (1994) for scandium, nickel, vanadium, zirconium, hafnium, niobium, tantalum, uranium, and thorium and Horn et al. (1994) for scandium, vanadium, gallium, zinc, cobalt, zirconium, hafnium, niobium, and tantalum. These are supplemented by data for hydrous melts by Nielsen and Beard (2000). 

Gasparik and Drake (1995) report Superphase B (MgioSi30i4[OH,E]4)/melt partitioning data for 23 GPa and 1,500-1,600 °C. Calcium, scandium, and samarium are highly incompatible in Superphase B, while titanium is indifferent. 

Compatible element An element with equilibrium solid/melt partition coefficient >1. In garnet (and zircon), heavy REE, scandium, vanadium, and yttrium are compatible. These elements are incompatible in all other rock-forming minerals involved in igneous fractionation processes discussed in this chapter. 

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