Selenides and sulfides from Iron Monarch, South Australia

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The selenide assemblage at Iron Monarch, South Australia, has been characterized using electron microprobe analyses. The principal selenide minerals are: eucairite (Ag 1.03Cu 0.98Se 0.99S 0.01), naumannite (Ag 2.03Cu 0.02Se 0.96S 0.04) and bohdanowiczite (Ag 0.96Cu 0.04Bi 1.01Se 1.98S 0.02) and these occur with francisite in barite. Also present are clausthalite, bismuthinite, wittichenite and a number of copper sulfides. The occurrence is of hydrothermal origin and is thought to be associated with the intrusion of quartz diorite dykes, at temperatures between 133°C and 250°C. The compositions of coexisting sulfides and selenides show strong partitioning of Se into the Ag rich minerals and S into the Cu rich minerals.

Original languageEnglish
Pages (from-to)36-48
Number of pages13
JournalNeues Jahrbuch fur Mineralogie, Monatshefte
Issue number1
Publication statusPublished - 1 Dec 1998


  • Bohdanowiczite
  • Eucairite
  • Naumannite
  • Partionning of selenium and sulfur
  • Selenides


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