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

Sven Karup-Møller, E. Makovicky, S.J. Barnes

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The sulphur-poor portions of the dry condensed Cu-Fe-Pd-S system were Studied at 1000 degrees C, 900 degrees C and 725 degrees 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.
Original languageEnglish
JournalMineralogical Magazine
Issue number4
Pages (from-to)941-951
Publication statusPublished - 2008


  • nielsenite
  • sulphide melt
  • Cu-Pd-Fe-S phase system
  • skaergaardite
  • bornite
  • Cu-Pd-Fe alloy

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