POLYMETALLIC SULPHIDE OCCURRENCES IN THE UPPER PALEOZOIC COMPLEXES OF NORTHEASTERN MONTENEGRO
Journal Title: UNKNOWN - Year 2007, Vol 19, Issue 1
Abstract
In the NE Montenegro, in the area Mt. Javorje and in the surrounding of the towns Bijelo Polje, Mojkovac, Ivangrad (Berane), Murino, Plav and Konjusi (Konjuhe) there are numerous small ore occurrences of pyrite and subordinately pyrrhotite with few per cent of Cu-, Zn- and Pb-sulphide in the small quantity of quartz and carbonate gangue minerals in Upper Paleozoic deposits. Different opinions considering the age of this ore occurrences exist in the literature of Montenegro: Upper Paleozoic or Middle Triassic. This study has revealed that most of this ore occurrences are of Permian age. Such statement relies on the discovery of Lower-Middle Permian fossils, on the specific occurrence of intercalated conglomerates, coarse grained sandstones and recrystallized limestones in the immediate vicinity and on the frequent stratiform (concordant) form of the occurence of ore and magmatic lenses and layers, or on the stratabound occurrences of ore impregnations and veins, respectively. It was concluded that all Pb-Zn ore deposits of Montenegro were derived from the same magma. It gave in three successive pulsations Permian small ore occurrences in early rift stage, larger Lower Triassic ore occurrences in the intermediate rift stage and the largest Middle Triassic Pb-Zn ore deposits in the main rift stage. This hypothesis is based on the isogenetic character of Pb204 and on the uniform values of endogene sulphide sulphur S34 of galena and pyrite in the ore deposits of all three stratigraphic horizons. The important indicator is permanent presence of Cu minerals, what is typical for Paleozoic ore deposits of whole Dinarides.
Authors and Affiliations
Ivan Jurković
Keywords
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