Reference Database (ERR)
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Detailed Reference Information
Fleet et al. 1993
Fleet, M.E., Chryssoulis, S.L., Stone, W.E. and Weisener, C.G. (1993). Partitioning of Platinum-Group Elements and Au in the Fe-Ni-Cu-S System - Experiments on the Fractional Crystallization of Sulfide Melt. Contributions to Mineralogy and Petrology 115(1): 36-44.
Partitioning of platinum-group elements (PGE) between sulfide liquid and monosulfide solid solution (mss) has been investigated by crystallizing mss from Fe - Ni - Cu sulfide liquid at 1,000-1,040-degrees-C, using bulk compositions and PGE contents typical of magmatic sulfides associated with mafic and ultramafic systems. Products were analyzed in situ for PGE and Au using SIMS. Sulfide liquid compositions were more Ni- and Cu-rich than coexisting mss. Liquid/mss partition coefficients are: Os - 0.23 +/- 0.04, Ir - 0.28 +/- 0.11, Ru 0.24 +/-0.05, Rh - 0.33 +/- 0.06, Pt - 4.8 +/- 0.7, Pd - 4.8 +/- 1.9, Au - 11.4. Partitioning of PGE is independent of PGE concentration and Ni content in the composition range investigated. Additionally, Henry's law appears to be obeyed up to minor-element contents in the sulfide liquid and mss. Osmium, Ir, Ru, and Rh are compatible elements in the anhydrous Fe - Ni - Cu - S system, whereas Pt, Pd and Au are incompatible elements. These affinities correspond to the partitions of PGE between massive and Cu-rich magmatic sulfides. However, the detailed precious-metal compositions of the Cu-rich sulfides of mafic rock systems, disseminated ores of komatiites and Cu-rich assemblage of droplet ore from the Noril'sk-Talnakh deposits are not consistent with those expected for pristine fractionated sulfide liquids.

Kd's Database



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microprobe, deposits, olivine, fluids, mantle
Contributions to Mineralogy and Petrology
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