REJUVENATION OF GOLD-SILVER ORES OF DUKATDEPOSIT (FLUID INCLUSIONS STUDY)

Thermo- and cryometric study of liquid part of the inclusions in quart z of ore bodies of Dukat gold-silver deposit has been conducted. It ha s been stated that chemical composition of liquid part of the inclusio ns in quartz from different mineral assemblages varies insignificantly but salt content increases at the moment of rodonite - rhodochrosite assemblage formation. Temperature interval of mineral associations for mation expands with progressing of hydrothermal process, but the avera ge homogenization temperature is preserved (slightly increased). High- temperature (750-620-degrees-C) inclusions of brine-melts have been fo und within rodonite - rhodochrosite association. Anomalous temperature jumps at the later rodonite - rhodochrosite stage are caused by addit ional heating initiated by granodiorite intrusion. Sulfide sulfur dete rmination in the fluid inclusions were also performed. Possible comple x gold and silver compounds in mineral-forming solutions have been cal culated based on the experimental data.