Naslov
Genetic model of the Pb-Zn-Ag deposit Crnac, Mts. Rogozna, Kosovo / Genetski model ležišta olova, cinka i srebra Crnac, na planini Rogozna, Kosovo
(Genetic model of the Pb-Zn-Ag deposit Crnac, Mts. Rogozna, Kosovo)

Autori
Borojević Šoštarić, Sibila

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, doktorska disertacija

Fakultet
Prirodoslovno-matematički fakultet

Mjesto
Zagreb

Datum
10.07

Godina
2009

Stranica
138

Mentor
Palinkaš, Ladislav ; Neubauer, Franz

Ključne riječi
amphibolite sole; Oligocene volcanics; epithermal; listwaenites; Western Vardar zone

Sažetak
The host amphibolites represent an amphibolite sole of the Western Vardar zone, obduced 170.4± 1.2 – 164.9± 1.3 Ma ago, synchronous with closure within Dinarides-Hellenides. Tholeiitic amphibolites originate from a depleted whereas alkaline amphibolites from enriched source, the latter represent members of the Triassic rift-related magmatism. Volcanic activity that produced shoshonitic and high-K calc-alkaline volcanics at Rogozna Mts. lasted within unique phase from 32.4± 1.0 – 27.4± 0.3 Ma. Volcanics originated from melting of an amphibole-bearing spinel-lherzolite source, enriched by fluids and melts derived from earlier subduction, and underwent fractionation and crustal contamination. Injection of the porphyry dykes at Crnac deposit 28.9± 0.3 Ma ago generated NaCl– H2O rich magmatic fluids with temperature of 280 – 400 º C, salinities of 2 – 36 wt. % NaCl equ. under a pressure of 60 – 280 bars. Fluids caused propylitic, potassic and sericitic-kaolinitic alteration of dykes and amphibolite hosts, dated at 28.6± 0.5 Ma, and produced listwaenites at the amphibolite-serpentinite interface. An open system hydrothermal circulation was established with increased influence of meteoric water toward later stages of hydrothermal activity, precipitating pyrite, quartz, Pb-Zn ore and finally carbonates from diluted, low-temperature fluid (0.2 – 4.8 wt. % NaCl equ., 115 – 280 °C, 5 and 60 bars).

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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