Naslov
Genesis of hydrothermal and skarn paragenesis in Pb-Zn-Ag mineral deposit Trepča (Stari Trg), Kosovo

Autori
Strmić Palinkaš, Sabina

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, doktorska disertacija

Fakultet
Prirodoslovno-matematički fakultet

Mjesto
Zagreb

Datum
08.05

Godina
2009

Stranica
143

Mentor
Palinkaš, Ladislav ; Molnar, Ferenc

Ključne riječi
skarn; hydrothermal mineralization; Vardar Zone; fluid inclusions; stable isotopes; radiogenic isotopes

Sažetak
The Pb-Zn-Ag Trepča mineral deposit is located 40 km NW from Priština, Kosovo. The deposit is spatially and temporary related to intensive Tertiary postcollisional magmatism within the Kopaonik block of Western Vardar zone in the easternmost part of Dinarides. The K/Ar and Ar/Ar dating of the breccia and associated igneous rocks suggest the Late Oligocene age (24.0 ± 0.7 to 25.1 ± 0.9 Ma). The principal host rock is recrystallized Triassic limestone covered by schist. The phreatomagmatic breccia is situated at the contact between the host limestone and overlaying schist. The mineralization is represented by skarn and hydrothermal parageneses as two end-member types. The skarns occur in form of replacement of the recrystallized limestone, whereas hydrothermal mineralizations appear as replacements and as open-space fillings. Hedenbergite represents the principal skarn mineral formed during the prograde stage under influence of Ca-Na-Cl fluids from magmatic origin. Formation temperature is limited between 380 and 500°C. The retrograde stage was initiated by phreatomagmatic explosions and formation of the breccia. The involvement of the groundwater in the system increased oxygen fugacity and caused alterations of pyroxenes into ilvaite, magnetite, carbonates and quartz. Hydrothermal parageneses comprise galena, sphalerite, pyrite, quartz and rhombohedral carbonates. They are superimposed onto the skarn assemblages and were produced by mixing of magmatic fluids with the groundwaters under increased sulphur fugacity. Traverine deposition is related with very late stage of hydrothermal activity in the area.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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