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The paper presents the results of a study on fluid inclusions (petrography, chemistry, Th, Td) from the gold-containing quartz in the shear zone - type mineralizations from Bozovici (Banat) and Some?ul Rece (Gil¾ u Mountains). Four types of fluid inclusions were identified: A - aqueous, AS - aqueous with efflorescences and crystals of nahcolite, C - monophasic and biphasic containing CO2, and AC - aqueous solutions with CO2. Microthermometry (Th and Td) indicated homogenisation temperatures of nahcolite between 136-260 0 C, total homogenisation temperatures of 283-390 0 C, and a maximum temperature (Td) between 380-420 0 C. The molar content of the CO2/H2O ratio varies between 0.35 - 0.72; salinity ranges between 2 - 14 wt % equivalent. Gold is intimately disseminated in quartz (in both studied occurrences), but also it is associated with sulphides, especially pyrite (Bozovici) and chalcopyrite (Some?ul Rece).

studia universitatis babeș-bolyai. geologia/studia universitatis babeş-bolyai. geologia

Implications resulting from the study of the fluid inclusions in the shear zone-type gold mineralization from Bozovici (Banat) and Somesul Rece (Gilau Mountains)