Terra Balcanica Resources has secured a new mineral exploration licence for the Viogor polymetallic project in eastern Bosnia and Herzegovina, consolidating three previously drilled targets into a single 49 square kilometre tenure within the historically significant Srebrenica mining district.
The licence, issued on 20 May 2026 by the Republic of Srpska Ministry of Energy and Mines to Terra’s wholly owned subsidiary Energetski minerali doo Banja Luka, is valid for three years with two potential two-year extensions providing up to seven years of continuous exploration tenure. It covers the Čumavići polymetallic corridor, the Kiseli Potok molybdenum porphyry and the two Brežani discoveries — all defined during Terra’s exploration work between 2020 and 2022.
The Čumavići corridor is the flagship target, hosting a series of high-grade intermediate sulphidation epithermal silver-antimony-zinc-lead-gold vein systems across more than 7.2 kilometres of strike length. The Čumavići Ridge system has been tested across more than 28 drill holes along 180 metres of strike, returning an average grade of 485 grams per tonne silver equivalent over 4.0 metres. The mineralisation is characterised by sphalerite, stibnite and galena with silver-rich sulphosalts — making antimony, a metal subject to Chinese export controls since September 2024, a key strategic commodity within the project.
The Brežani discovery hosts a large multidomain magmatic-hydrothermal system including a 650 by 400 metre gold-bearing skarn and a structurally controlled base metal epithermal zone at depth. A discovery hole intersected approximately 20 metres of fault-breccia hosted silver-antimony-zinc mineralisation at 480 metres depth grading above 436 grams per tonne silver equivalent. An electromagnetic conductor interpreted as the antimony-silver-zinc mineralisation extends 1.2 kilometres in length and up to 600 metres in width, offering potential for a large tonnage ore body.
The project is strategically located approximately 80 kilometres east-northeast of Dundee Precious Metals’ Vareš silver-zinc mine and adjacent to the Mineco Sase mine, which produces approximately 330,000 tonnes of lead-zinc-silver-gold concentrate per year using processing infrastructure genetically compatible with Terra’s mineralised targets.
Terra CEO Dr. Aleksandar Mišković said securing the licence removes tenure uncertainty and paves the way for a preliminary resource estimate in 2027, positioning the company as a potential supplier of critical metals — notably antimony — to neighbouring European markets.









