GENETIC FEATURES OF GOLD AND SILVER FROM PORPHYRY COPPER DEPOSITS AS CRITERIA FOR ORE DRESSABILITY (THE ALMALYK REGION OF THE UZBEKISTAN REPUBLIC HAS BEEN CONSIDERED AS AN EXAMPLE)

摘要

Gold-bearing porphyry copper ores of the Almalyk region have been typified, their behaviour has been studied in an ore-dressing flowsheet. It is shown, that gold is " mainly paragenetic to sulphide streak-disseminated copper-molybdenum mineralization; partly associated with telescoped gold ore polygenetic formations; characterised by sharp predomination of finely dispersed particles, xenomorphism, presence of common paragenesis of complete series of gold-silver minerals, copper impurity and predomination of 650-850 standard. Noble metals are distinctly regrouped by ore metamorphism processes. Gold of porphyry copper ores is characterised both by original features and properties of copper pyrite gold, as well as of gold-ore bodies from variable depth.