Abstract
Partitioning of platinum-group elements (PGE) between sulfide liquid and monosulfide solid solution (mss) has been investigated by crystallizingmss from Fe−Ni−Cu sulfide liquid at 1,000–1,040° C, using bulk compositions and PGE contents typical of magmatic sulfides associated with mafic and ultramafic systems. Products were analyzedin situ for PGE and Au using SIMS. Sulfide liquid compositions were more Ni- and Cu-rich than coexistingmss. 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 andmss. 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.
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Chryssoulis SL (1990) Quantitative trace precious metal analysis of sulphide and sulpharsenide minerals by SIMS. In: Benninghoven A, Evans CA, McKeegan KD, Storms HA, Werner HW (eds) Secondary ion mass spectrometry SIMS VII. John Wiley, New York, pp 405–408
Chryssoulis SL, Cabri LJ (1991) Quantitative microanalysis of PGE in sulphide and oxide minerals (abstract). 6th Int Platinum Symp Abstr, Perth, Aust, p 15
Chryssoulis SL, Weisener CG (1991) Quantification and imaging of submicroscopic Au in ore minerals by SIMS. In: Benninghoven A, Janssen K, Tümpner J, Werner HW (eds) Secondary ion mass spectrometry SIMS VIII. John Wiley, New York, pp 517–520
Chryssoulis SL, Cabri LJ, Salter RS (1987) Direct determination of invisible gold in refractory sulphide ores. In: Salter RS, Wyslouzil DM, McDonald GW (eds) 1. Proc Int Symp Gold Metall. Pergamon Press, pp 235–244
Chryssoulis SL, Alcock RA, Sizgoric MB, Cabri LJ (1989a) Quantitative trace PGE analyses of pyrrhotite, pentlandite and millerite. 5th Int Platinum Symp, Helsinki, Bull Geol Soc Finl part 1, no. 61, p 56
Chryssoulis SL, Cabri LJ, Lennard W (1989b) Calibration of the ion microprobe for quantitative trace precious metal analyses of ore minerals. Econ Geol 84:1684–1689
Chryssoulis SL, Distler VV, Evstigneeva TL, Filimonova AA, Genkin AD, Weisener CG (1991) Platinum group elements in the sulphides of Noril'sk copper-nickel ores (abstract). 6th Int Platinum Symp Abstr, Perth Aust, p 16
Craig JR, Kullerud G (1969) Phase relations in the Cu−Fe−Ni−S system and their application to magmatic ore deposits. Econ Geol Monogr 4:344–358
Czamanske GK, Kunilov VE, Zientek ML, Cabri LJ, Likhachev AP, Calk LC, Oscarson RL (1992) A proton-microprobe study of magmatic sulfide ores from the Noril'sk-Talnakh district, Siberia. Can Mineral 30:249–287
de Waal SA, Calk LC (1975) The sulfides in the garnet pyroxenite xenoliths from Salt Lake Crater, Oahu. J Petrol 16:134–153
Distler VV, Malevskiy AYu, Laputina IP (1977) Distribution of platinoids between pyrrhotite and pentlandite in crystallization of a sulfide melt. Geochem Int 14:30–40
Farrow CEG, Watkinson DH (1992) Alteration and the role of fluids in Ni, Cu and platinum-group element deposition, Sudbury Igneous Complex contact, Onaping-Levack area, Ontario. Mineral Petrol 46:67–83
Fleet ME (1977) Origin of disseminated copper-nickel sulfide ore at Frood, Sudbury, Ontario. Econ Geol 72:1449–1456
Fleet ME, MacRae ND (1983) Partition of Ni between olivine and sulfide and its application to Ni−Cu sulfide deposits. Contrib Mineral Petrol 83:75–81
Fleet ME, MacRae ND (1988) Partition of Ni between olivine and sulfide: equilibria with sulfide-oxide liquids. Contrib Mineral Petrol 100:462–469
Fleet ME, Stone WE (1991) Partitioning of platinum-group elements in the Fe−Ni−S system and their fractionation in nature. Geochim Cosmochim Acta 55:245–253
Fleet ME, Stone WE, Crocket JH (1991a) Partitioning of palladium, iridium, and platinum between sulfide liquid and basalt melt: effects of melt composition, concentration, and oxygen fugacity. Geochim Cosmochim Acta 55:2545–2554
Fleet ME, Tronnes RG, Stone WE (1991b) Partitioning of platinum group elements in the Fe−O−S system to 11 GPa and their fractionation in the mantle and meteorites. J Geophys Res 96:21,949–21,958
Genkin AD, Distler VV, Gladyshev GD, Filimonova AA, Evstigneeva TL, Kovalenker VH, Laputina IP, Smirnov AV, Grokhovskaya TL (1981) Sulfide Copper-Nickel Ores of the Noril'sk Deposits (in Russian). Nauka, Moscow
Hawley JE (1962) The Sudbury ores: their mineralogy and origin. Can Mineral 7:1–207
Kullerud G, Yund RA, Moh GH (1969) Phase relations in the Cu−Fe−S, Cu−Ni−S, and Fe−Ni−S systems. Econ Geol Monogr 4:323–343
Lorand JP (1989) The Cu−Fe−Ni sulfide component of the amphibole-rich veins from the Lherz and Freychinède spinel peridotite massifs (Northeastern Pyrenees, France): a comparison with mantle-derived megacrysts from alkali basalts. Lithos 23:281–298
Naldrett AJ (1989) Magmatic sulfide deposits. (Oxford Monographs on Geology and Geophysics no. 14) Clarendon Press, New York
Naldrett AJ, Innes DG, Sowa J, Gorton MP (1982) Compositional variations within and between five Sudbury ore deposits. Econ Geol 77:1519–1534
Wood SA (1987) Thermodynamic calculations of the volatility of the platinum group elements (PGE): the PGE content of fluids at magmatic temperatures. Geochim Cosmochim Acta 51:3041–3050
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Fleet, M.E., Chryssoulis, S.L., Stone, W.E. et al. Partitioning of platinum-group elements and Au in the Fe−Ni−Cu−S system: experiments on the fractional crystallization of sulfide melt. Contr. Mineral. and Petrol. 115, 36–44 (1993). https://doi.org/10.1007/BF00712976
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DOI: https://doi.org/10.1007/BF00712976