Ore Genesis pp 677-688 | Cite as

The Cu-Ni-S System and Low Temperature Mineral Assemblages

  • G. H. Moh
  • G. Kullerud
Part of the Special Publication of the Society for Geology Applied to Mineral Deposits book series (MINERAL DEPOS., volume 2)


The phase relations in the copper-nickel-sulfur system were studied utilizing silica tubes, in which vapor is an inherent phase, as reaction vessels. Experiments were carried out at 200°C on mixtures of the elements and mixtures of presynthesized nickel and copper sulfides. The experiments at 100°C in addition contained small amounts of carbon disulfide or an aqueous phase to increase reaction rates. Some experiments lasted as long as two years. Even after such extended periods many experiments produced certain phases and phase assemblages which are metastable. Thus, the phase diagram, presented at 100°C does not represent equilibrium in all its parts. However, these phase relations coincide very closely with those observed in many ores. The assemblages found in ores of various types are shown in photomicrographs.


Phase Relation Mineral Assemblage Polished Section Copper Sulfide Phase Assemblage 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1982

Authors and Affiliations

  • G. H. Moh
    • 1
  • G. Kullerud
    • 2
  1. 1.Mineralogisch-Petrographisches Institut der UniversitätHeidelbergGermany
  2. 2.Department of GeosciencesPurdue UniversityWest-LafayetteUSA

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