Australian company Middle Island Resources (MDI), focused on gold and base metals exploration, announced in its publications in September last year that it would carry out geological exploration at the Bobija project in western Serbia, considered prospective for gold, silver, copper, lead, and zinc deposits. As previously reported, this marked the first development phase of the portfolio of Konstantin Resources, which was acquired by MDI. The site includes an abandoned mine that has long been inactive. In addition to the former mine, the area is known as the “roof of Azbukovica,” specifically the crest of a hilly-mountainous zone where the Drina River separates Serbia and Republika Srpska. Bobija was originally explored during the former Yugoslavia period, when underground works and several drilling campaigns were conducted in search of barite, lead, and zinc, with indications of gold and silver also identified at that time.
The project is located near Ljubovija and comprises six mineral licenses covering a total of 208 square kilometers, as detailed in the company’s earlier announcement. The first exploration phase focused on the historical Bobija mine area, where barite-sulfide mineralization can be clearly observed in the floor of the former open pit. The company then announced sampling, beginning with rock-chip sampling from outcrops and fractures.
According to the company, based on its geological analogy, Bobija shares many similarities with the well-known Vareš project in Bosnia and Herzegovina, which hosts 20.9 million tonnes of ore with average grades of gold, silver, copper, lead, and zinc. In other words, this is an underexplored area from a mining and geological perspective, whose value and long-term potential have not yet been established.
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New Soil Sampling Results
The latest results from the Bobija project relate to the wider Tisovik area, where expanded soil sampling confirmed the presence of large, interconnected geochemical anomalies of silver, lead, zinc, and antimony. Compared with earlier stages, the key new development is the significantly broader spatial extent of these anomalies, suggesting that the mineralization signal is not localized but distributed across multiple connected zones.
According to the company’s statement, anomalies were identified over approximately five kilometers along an east-west trend across the target zones of Tisovik, Crvene Stene, and Kozila. This continuity, combined with the simultaneous presence of multiple metals, points to the possibility of a more developed polymetallic system than previously confirmed in the field.
Key new data include peak values from soil samples of up to 7.1 g/t silver, 4,685 ppm lead, 969 ppm zinc, and 1,049 ppm antimony. The company says these results support an interpretation of a robust polymetallic system, while emphasizing that this remains a geochemical-stage exploration program, and that the full significance of the findings will depend on the next exploration steps.
A new sampling campaign has been announced for March 2026, aimed at testing the extensions of anomalous zones across a large area that remains unexplored to date.
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