Sinjakovo Project
OUR PROJECTS
Exploration potential
Fe, Cu, Zn, Pb, Co, Ag, Au
About the project
The Sinjakovo Project is located approximately 3 km south of Mrkonjić Grad and 45 km south of Banja Luka, the second largest city in Bosnia and Herzegovina and the administrative center of Republika Srpska. The project area is well serviced by infrastructure, with access via sealed roads from Banja Luka (60 km to the north) and Sarajevo (180 km to the southeast).
Yugo Metals considers Sinjakovo to be highly prospective for polymetallic mineralisation, with potential for copper, lead, zinc, and associated precious metals. The area has a history of small-scale exploration, yet remains largely under-explored using modern techniques, presenting significant opportunity for discovery.
Mineralisation and Deposit Types
Yugo Metals believes there is significant potential for the discovery of economic copper mineralisation at Sinjakovo, along with barite, lead, zinc, silver, and potentially gold and cobalt.
Historical mining within the Sinjakovo licence area targeted copper–iron mineralisation hosted in siderite-rich horizons within Carboniferous sedimentary sequences. Operations ceased in the early 1900s, but subsequent exploration has confirmed the presence of copper and iron mineralisation along several outcropping siderite layers.
Notably, previous programs did not assay for Pb, Zn, Co, Ag, or Au, elements that should be systematically evaluated in future exploration. Historical sampling near the old mine workings reported elevated silver values, supporting the potential for a broader polymetallic system.
Copper and Iron Mineralisation
Historical mining and exploration at Sinjakovo identified several mineral occurrences, including copper–iron mineralisation within Carboniferous schists and limestones in the central part of the licence, and barite-hosted Pb–Zn–Cu–Ag mineralisation within Devonian-age sediments to the southwest and east.
Early mining targeted chalcopyrite-bearing siderite–ankerite layers hosted in Carboniferous limestones around the Ravni Osredak locality. During the Austro-Hungarian period (1894–1910), production focused on these siderite horizons, with historical reports indicating between 27,000 t and 120,000 t of material grading 3–25% Cu was mined. Material grading below 3% Cu was discarded as waste and used for backfill. Estimates suggest 15,000–16,000 t of copper–iron–rich material remain near the historical workings.
The mineralisation occurs as siderite–ankerite layers, 1–6.5 m thick and up to 15 m in width, extending for approximately 2 km along strike in a series of faulted, lens-shaped bodies. These lenses follow a Z-shaped structural trend, with possible extensions to the northwest and east beneath younger Triassic cover.
Barite-Hosted Pb–Zn–Cu–Ag Mineralisation
Barite mineralisation occurs within Devonian-age sediments in the east and northeast of the licence area, extending beyond the eastern boundary near Jezero. Two mineralisation styles are recognised:
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First-generation veins, associated with quartz and galena, typically narrow (centimetre to decimetre scale) and of limited economic interest.
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Second-generation barite veins, associated with sulphides including tetrahedrite (Cu,Fe,Zn,Ag)(Cu,Fe,Zn,Ag)(Cu,Fe,Zn,Ag)₁₂Sb₄S₁₃, and locally more significant.
Small-scale barite mining previously occurred near Otomalj Mountain, less than 1 km east of the licence. Within the licence area, historical adits at Džumelije and Beg Luka (1 km NNW of Jezero) expose barite–malachite–azurite mineralisation along the Josavka riverbank. Additional outcrops to the northwest show ~2 m thick barite veins dipping 60° west, traceable for about 50 m.
Sampling by the Yugoslav Geological Survey (1988–1990) recorded elevated Pb, Zn, Cu, and Ag values from these occurrences, indicating proximity to mesothermal to epithermal polymetallic systems.
More Projects
Jezero
The Jezero Project is located in the western part of the Republic of Srpska, Bosnia and Herzegovina, within the municipality of Jezero.
Sinjakovo
The Sinjakovo Project is located 3 km south of Mrkonjić Grad and approximately 45 km south of Banja Luka, the second-largest city in Bosnia and Herzegovina and the capital of the Republic of Srpska.
Sočkovac
The Sočkovac Project is located in the central-eastern part of Bosnia and Herzegovina. Historical exploration defined a polymetallic Ni-Cu-Zn-Pb (±Ag-Au) lens in Jurassic-age phyllitic schists and serpentinites.
