Terra Balcanica Points to Silver and Antimony Grades and Ore Body Potential in Bosnia
Vancouver, British Columbia – June 3rd 2025 – Terra Balcanica Resources Corp. (“Terra” or the “Company”) (CSE:TERA; FRA:UB10) is pleased to highlight the polymetallic potential of its Viogor-Zanik project in Bosnia in anticipation of the Phase III drilling campaign.
After 2,200 m of diamond drilling completed at Chumavichi, high grade Ag-Sb-Pb-Zn-Au mineralizations have been confirmed at three targets spanning 2 km of strike along a shallow, fault-hosted, intermediate sulfidation, polymetallic vein system (Figures 1).
At the Company’s other Viogor-Zanik target of Brezani (Figure 2), Terra discovered a retrograde, chlorite-overprinted gold skarn system starting from surface and superimposed on a >1.2 km long, NE-shallowing Ag-Sb-Pb-Zn mineralized, fault-hosted permeability corridor (see the Company’s news release from April 11th, 2024). Here, with the maiden diamond drill hole BREDD002, Terra intercepted a 20-m wide, high grade, antimony-silver mineralization (see the Company’s news release from January 20th, 2025).
The significant potential of silver (Ag) and antimony (Sb) mineralization in Bosnia is highlighted by the drill results below (Table 1).
Chumavichi Target
| Hole ID | From (m) | Intercept (m) | Au (g/t) | Ag (g/t) | Zn (%) | Pb (%) | Sb (%) | Ag Eq (g/t) | Ag Eq* (g/t) |
| CMVD001 upper | 29.0 | 4.0 | 0.84 | 131.5 | 4.59 | 2.12 | 1.85 | 824 | 1306 |
| including | 30.0 | 2.0 | 1.62 | 261 | 9.10 | 4.20 | 3.70 | 1634 | 2602 |
| CMVD002 | 45.0 | 2.0 | 0.23 | 144 | 8.26 | 4.27 | 0.44 | 816 | 667 |
| CMVD003 | 89.0 | 8.7 | 0.81 | 105 | 1.17 | 0.70 | 1.20 | 466 | 837 |
| including | 91.0 | 2.0 | 1.16 | 289 | 3.16 | 2.03 | 3.50 | 1197 | 2300 |
| CMVD004 | 43.0 | 11.0 | 0.30 | 225 | 0.83 | 0.56 | 1.48 | 505 | 1039 |
| including | 44.8 | 1.7 | 0.81 | 1420 | 4.95 | 3.42 | 9.40 | 3075 | 6474 |
| CMVD005 lower | 81.0 | 10.0 | 0.78 | 75 | 0.61 | 0.40 | 0.68 | 284 | 520 |
| including | 86.0 | 2.0 | 2.85 | 258 | 1.89 | 1.42 | 1.70 | 896 | 1475 |
| CMV23001 upper | 11.0 | 4.8 | 1.61 | 132 | 1.51 | 0.57 | 1.56 | 551 | 1132 |
| CMV23001 lower | 31.6 | 0.3 | 0.47 | 106 | 1.00 | 0.28 | 3.22 | 669 | 1823 |
| CMV23002b upper | 22.0 | 3.8 | 0.70 | 125 | 5.53 | 2.72 | 0.48 | 499 | 621 |
| CMV23002b lower | 31.0 | 2.0 | 0.57 | 166 | 0.21 | 0.11 | 0.12 | 227 | 290 |
| CMV23003 | 43.85 | 4.15 | 0.64 | 53 | 4.12 | 2.99 | 0.73 | 457 | 641 |
| CMV23004 | 36.2 | 1.35 | 3.49 | 452 | 3.36 | 2.14 | 1.95 | 1168 | 1908 |
| CMV23007 | 39.05 | 0.75 | 0.17 | 31 | 0.72 | 0.15 | 2.95 | 531 | 1572 |
| CMV23009 | 39.4 | 1.10 | 0.26 | 88 | 2.03 | 0.19 | 1.17 | 355 | 763 |
Table 1. Previously released Terra Balcanica drill core assays from the Chumavichi target. Interval lengths reported are drilled lengths, not true widths. Silver equivalents (Ag Eq*) are the original metal equivalents recalculated based on the current metal prices of US$3,375/oz for gold (Au), US$34.45/oz for silver (Ag), US$1.22/lb for zinc (Zn), US$25.62/lb for antimony (Sb) and US$0.89/lb for lead (Pb). Metal recoveries of 90% Au, 93% Ag, 95% Sb, 94% Pb and Zn are applied to all assays based on published metallurgical tests from the analogous polymetallic deposit mined by Adriatic Metals plc.
Figure 1. Geological map of the Chumavichi ore corridor illustrating the drilled targets, namely: Cumavici Ridge, Cumavici Crest and Joseva. The Seoce and Cumurnica targets remain to be drilled in 2025. The yellow strips represent Yugoslav ore block segments from 1983 used for non-43-101 compliant resource calculation (WGS84/UTM Zone 34N;
Brezani Target
The 674 m Brezani drillhole BREDD002 has intercepted base metal-rich (Sb-Ag),epithermal mineralization between 482.1 and 505 m of depth yielding . The zone of mineralization consists of banded veins and massive sulphide-cemented breccias with structural and mineralogical characteristics of low and intermediate sulphidation epithermal deposits. The upper vein contact is sharp with minimal alteration progressing into the hornfels, whereas the vein footwall is brecciated and strongly clay altered. The margins of the vein host repeating bands of chalcedonic quartz, rhodochrosite, calcite, sulphides, and sulphosalts including stibnite, pyrite, arsenopyrite, sphalerite, galena, and jamesonite. The core of the mineralized zone is dominated by hydrothermal breccia with a sulphide-quartz-carbonate cement and banded vein fragments as framework.
| Hole ID | From (m) | Intercept (m) | Au (g/t) | Ag (g/t) | Zn (%) | Pb (%) | Sb (%) | AgEq (g/t) | AgEq* (g/t) |
|---|---|---|---|---|---|---|---|---|---|
| BREDD002 | 482.1 | 19.6 | 0.18 | 85 | 0.48 | 0.20 | 0.79 | 436 | 520 |
| including | 482.1 | 9.8 | 0.26 | 129 | 0.70 | 0.24 | 1.42 | 746 | 900 |
Table 2. Maiden drill core assays from the Brezani target. Interval lengths reported are drilled lengths, not true widths. Silver equivalents (Ag Eq*) are the original metal equivalents recalculated based on the current metal prices. Metal recoveries of 90% Au, 93% Ag, 95% Sb, 94% Pb, and Zn are applied..
Figure 2. Geological map of the Chumavichi ore corridor illustrating the drilled targets, namely: Cumavici Ridge, Cumavici Crest and Joseva. The Seoce and Cumurnica targets remain to be drilled in 2025. The yellow strips represent Yugoslav ore block segments from 1983 used for non-43-101 compliant resource calculation (WGS84/UTM Zone 34N;
The intercept coincides with a shallowing subsurface conductivity anomaly potentially indicating a base- and precious metal mineralized zone with a volume defined by 1,200 m length down dip towards WSE, 650 m width along NNW-SSE trending strike and up to 20 m in width although similar fault-hosted IS epithermal systems tend to pinch and swell along strike and down dip (Figure 2).
Qualified Person
Dr. Aleksandar Mišković, P.Geo, the Company’s designated Qualified Person for this news release within the meaning of National Instrument 43-101 Standards of Disclosure of Mineral Projects (“NI 43-101”), has reviewed and validated that the information contained in this news release is factual and accurate.
About the Company
Terra Balcanica is a polymetallic and energy metals exploration company targeting large-scale mineral systems in the Balkans of southeastern Europe and norther Saskatchewan, Canada. The Company has 90% interest in the Viogor-Zanik Project in eastern Bosnia and Herzegovina. The Canadian assets comprise a 100% optioned portfolio of uranium-prospective licences at the outskirts of the world-renowned Athabasca basin: Charlot-Neely Lake, Fontaine Lake, Snowbird, and South Pendleton. The Company emphasizes responsible engagement with local communities and stakeholders. It is committed to proactively implementing Good International Industry Practice (GIIP) and sustainable health, safety, and environmental management.
On Behalf of the Board of Directors
Terra Balcanica Resources Corp.
“Aleksandar Mišković”
Aleksandar Mišković
President and CEO
For further information, please contact Aleksandar Mišković at amiskovic@terrabresources.com, +1 (514) 796-7577, or visit our website at www.terrabresources.com/en/news.
Cautionary Statement
This news release contains certain forward-looking information and forward-looking statements within the meaning of applicable securities legislation (collectively “forward-looking statements”). The use of any of the words “will”, “intends” and similar expressions are intended to identify forward-looking statements. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking statements. Such forward-looking statements should not be unduly relied upon. Actual results achieved may vary from the information provided herein as a result of numerous known and unknown risks and uncertainties and other factors. The Company believes the expectations reflected in those forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be correct. The Company does not undertake to update these forward-looking statements, except as required by law.