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Science. 2004 Sep 24;305(5692):1951-3.

Fractionation of the platinum-group elements during mantle melting.

Author information

1
Institut für Mineralogie, Universität Münster, Corrensstrasse 24, 48149 Münster, Germany. bockrat@nwz.uni-muenster.de

Abstract

Experiments in sulfide-silicate systems demonstrate that two sulfide phases are stable in the asthenospheric upper mantle: a crystalline osmium-iridium-ruthenium-enriched monosulfide and a rhodium-platinum-palladium-enriched sulfide melt. During silicate melt segregation, monosulfide stays in the solid residue, dominating the noble metal spectrum of residual mantle. The sulfide melt is entrained as immiscible droplets in the segregating silicate melt, defining the noble metal inventory of the basaltic component.

PMID:
15448267
DOI:
10.1126/science.1100160
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