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.
|Number of pages||13|
|Journal||Neues Jahrbuch fur Mineralogie, Monatshefte|
|Publication status||Published - 1 Dec 1998|
- Partionning of selenium and sulfur