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

Authors

Vasile Pomârleanu
Ioan Mârza, Babes̡-Bolyai University, Faculty of Biology and Geology, Department of Geology

Abstract

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 (Gil¾u 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 136-2600 C, total homogenisation temperatures of 283-3900 C, and a maximum temperature (Td) between 380-4200 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).

Recommended Citation

Pomârleanu, Vasile and Mârza, Ioan (2002) Implications resulting from the study of the fluid inclusions in the shear zone-type gold mineralization from Bozovici (Banat) and Somesul Rece (Gilau Mountains), Studia UBB Geologia 47 (1): 105-116
DOI: http://dx.doi.org/10.5038/1937-8602.47.1.8
Available at: https://digitalcommons.usf.edu/geologia/vol47/iss1/art8