Au-Pd And Bi-Se Bearing Pyrite And Chalcopyrite From The Buchim Copper Mine, Eastern Macedonia

In the Buchim porphyry copper deposit, we determined several representative rare mineral phases, comprising metals from the gold-palladium group as well as those from the bismuth-selenium (Cu-Bi-Se-Te-As) group. The bismuth-selenium rare mineral phases are represented by new rare mineral phases in the Buchim porphyry copper deposit, bismuthinite, galenobismutite, krupkaite, friedrichite, emplectite, laitakarite and native bismuth as well as mineral phases of gold-palladium, including gold and palladium with their elemental mixtures. It should be stressed that both types of rare mineral phases were determined in pyrite and chalcopyrite from major ore paragenesis in the Buchim deposit. The bismuth-selenium mineral phases were related to the major quartz-pyrite-chalcopyrite paragenesis, while the gold-palladium phases were related to a slightly higher temperature, oxido-sulphide parageneses such are magnetite-pyrite- chalcopyrite (Mt-Py-Cp) and pyrite-chalcopyrite (Py-Cp).