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The metal-rich portions of the phase system Cu-Fe-Pd-S at 1000°C, 900°C and 725°C: implications for mineralization in the Skaergaard intrusion

Published online by Cambridge University Press:  05 July 2018

S. Karup-Møller ,
E. Makovicky  and
S.-J. Barnes
S. Karup-Møller
Affiliation:
Environment and Resources, Technical University of Denmark, Bygning 113, DK-2800 Lyngby, Denmark
E. Makovicky
Affiliation:
Department of Geography and Geology, University of Copenhagen, Ø.Voldgade 10, DK-1350 Copenhagen, Denmark
S.-J. Barnes
Affiliation:
Sciences Appliquées, Université du Québec ` Chicoutimi, 555 Boulevard Université, Chicoutimi, G7H 2B1 Canada
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Abstract

The sulphur-poor portions of the dry condensed Cu-Fe-Pd-S system were studied at 1000°C, 900°C and 725°C by synthesis in evacuated silicate glass tubes, along with textural observations and electron microprobe analyses of equilibrated reaction products. Sulphide melt coexists with Cu-Fe-Pd alloys, bornite, Fe1-xS and iss (intermediate solid solution, Cabri, 1973) and Pd4S. Compositional data were obtained for the associations bornite-alloy-melt, pyrrhotite-alloy-melt and for immiscible Cu-rich sulphide melts. Partition coefficients for all three metals were derived for the association alloy-melt. Formation of the two new Cu-Pd alloy minerals, skaergaardite and nielsenite, is discussed in terms of the present findings.

Keywords

Cu-Pd-Fe-S phase systemsulphide meltCu-Pd-Fe alloyborniteskaergaarditenielsenite
Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 4 , August 2008 , pp. 941 - 951
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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