Mineralogy and geochemistry of Pb-Sb/As-sulfosalts from Coranda-Hondol ore deposit (Romania) - Conditions of telluride deposition

摘要

Electron microprobe analyses are reported on newly-identified occurrences of Pb-Sb/As sulfosalts from the Coranda-Hondol ore deposit, Certej area, South Apuseni Mountains, Romania. The Coranda-Hondol deposit is an intermediate-sulfidation Au-Ag epithermal system hosted in propylitic altered andesitic rocks covered by Cretaceous and Neogene sediments. The main base-metal sulfides are sphalerite, pyrite and galena. Subordinate amounts of chalcopyrite, arsenopyrite, pyrrhotite, marcasite, tetrahedrite-tennantite, bournonite-seligmannite +/- geocronite-jordanite, stibnite and Au-(Ag)-tellurides complete the paragenetic sequence. Gangue minerals are quartz, calcite and barite. Hydrothermal alteration is expressed as pyritisation, silicification, potassic alteration, carbonitisation and phyllic (or sericitic) alteration.