ABSTRACT
A paragenetic and microthermometric study has been carried out on the Pb-Zn deposit Jasenie-Soviansko (Nizke Tatry Mts., Slovakia). Mineralization of hydrothermal veins comprises five paragenetic stages: 1. quartz-pyrite, 2. ankerite, 3. galena, 4. barite, and 5. hematite. The main ore mineral is galena. It occurs in association with quartz, sphalerite, pyrite, tetrahedrite, bournonite, chalcopyrite, marcasite, gold, boulangerite and meneghinite. Comparison of fluid inclusion data from quartz of the galena and hematite stages reveals a decrease of temperature as well as salinity of the ore-forming fluids from 290 to 120-209°C and 35.1 to 26.3 wt% NaCl eq., respectively. The temporal evolution of fluid composition includes a decrease of NaCl and an increase of CaCl2 contents.
