Terra Balcanica Resources Corp. (CSE:TERA) (FRA:UB1) (OTC:TEBAF) is pleased to announce additional high-grade assay results from the Phase III drill campaign at the Cumavici Ridge polymetallic, epithermal vein target within its Viogor-Zanik project in eastern Bosnia and Herzegovina.

Highlights

• Drillhole CMV25005 intersected 607 g/t Ag Eq. over 3.0 m including:

• • 842 g/t Ag Eq which includes 3.05% Sb over 1.7m;

• Drillhole CMV25006 intersected 670 g/t Ag Eq. over 3.9 m including:

• • 2115 g/t Ag Eq which includes 9.58% Sb over 1.0 m;< /strong>

• Step out drillholes located 65 m northwest of CMV25004 which reported 636 g/t Ag Eq. over 4.3 m and 38 m SW of CMVD005 which intercepted 326 g/t Ag Eq. over 10 m;

• Results confirm the high-grade nature and continuity of mineralisation at Cumavici Ridge along strike towards NW potentially linking it with the Cumavici Crest zone. Mineralization remains open down dip to southwest;

• Cumavici Ridge-Crest fault-hosted system is one of the four targets along the largely untested, 5 km long corridor of Ag-rich, base metal mineralization.

Terra Balcanica CEO, Dr. Aleksandar Mišković, commented: “Two additional drill intercepts confirm that we have begun to unequivocally define a tabular, high-grade body of silver-antimony dominant mineralization at Cumavici Ridge. With over two dozen positive drill holes spread over 180 m of along strike and testing the southwest-inclined structure to over 200 m down dip, Terra is now looking to drill test the linkage to the neighboring Cumavici Crest target and in doing so extend the mineralization to over 650 m along strike. Furthermore, in 2026, we are poised to drill previously untested Cumurnica target located only 1.5 km to the southwest.”

Table 1. Assay results from drillholes CMV25003 and CMV25004 with the interval lengths reported as drilled lengths, not true widths given that true morphology of the mineralized zone is undetermined. Silver equivalents (“AgEq”) are based on assumed metal prices of US$5,000/oz for gold (Au), US$80/oz for silver (Ag), US$1.45/lb for zinc (Zn), US$20/lb for antimony (Sb) and US$0.86/lb for lead (Pb). Assumed metal recoveries of 90% Au, 93% Ag, 95% Sb, 94% Pb and 94% Zn were applied to all the laboratory assays and are based on recent published metallurgical tests from analogous polymetallic deposits in Bosnia.

 Figure 1. Photograph of PQ3 diameter core between 97.0 and 99.60 m downhole in CMV25005 (top) and between 90.8.0 and 93.60 m depth in CMV25006 (bottom). Massive, dark sulphide interval marked by green box in the lower box correlates to the high-grade Sb mineralization while banded, dark brown segment in the central part of the upper core box indicates Zn rich zone (click here to view image).

Drillcore Observations

The mineralized intervals intercepted by drillholes CMV25005 and CMV25006 are examples of the typical high grade, massive sulphides of polymetallic nature encountered at Cumavici Ridge since 2022. Mineralization is typified by massive sulphides which can be broadly grouped into a silver-antimony rich, sulph osalts-dominant interval and a colloform banded brown grey, Pb-Zn rich interval of massive sphalerite and galena. The Ag-Sb mineralization, which includes the reported drillholes, is an example of a series of underexplored polymetallic veins that form part of a regional NW-SE trending epithermal system. Others include: Cumurnica, Joseva, and Seoce.

Table 2. Collar location and DDH data for the CMV25003/CMV25004 drillholes (WGS84/UTM 34N).

 Figure 2. Geological map illustrating the drillholes at the Cumavici Ridge locality. AgEq values are labelled for selected 2022, 2023 and 2025 drill intercepts (See Company’s new releases dated 13 November 2023, 27 February 2023). The coordinate reference system is WGS84/UTM Zone 34N (click here to view image ).

Geology of Cumavici Ridge Target

The Cumavici license is dominated by volcanic rocks (tuffs and pyroclastic breccias) which have been crosscut by generally NW-SE trending structures and are part of a large epithermal mineral system. Mineralization is silver and antimony dominant with further gold-lead-zinc (Figure 1).

Terra’s drilling has confirmed three polymetallic systems so far: Joseva, Cumavici Crest, and the flagship vein system at Cumavici Ridge. The Cumurnica and Kazani targets remain to be drilled. Mineralisation is characterised by sphalerite-stibnite-galena and further sulphosalts minerals which are associated with quartz and calcite veining and breccia cement. The mineralisation occupies faults which crop out at surface as distinctive topographic lows, coinciding with magnetic lows and often with mineralisation visible within fault gouge.

QA/QC

Half PQ3 core samples were delivered to ALS Bor, Serbia for sample preparation and analysis at the ALS laboratory Loughrea, Ireland an ISO/IEC 17025:2017 certified testing laboratory. Sample preparation PREP-31BY method was used on all core samples. This involves crushing to 70% less than 2 mm, rotary split 1kg and pulverizing the split to greater than 85% passing 75 microns. Gold was assayed by 30g fire assay with ICP-AES finish (Au-ICP21). Analyses of silver and base metals were completed by highly oxidising digestion with HNO3, KClO3 and HBr (ASY-ORE) and the final solution in dilute aqua regia is determined by ICP-AES (ME-ICPORE). Control samples, comprising certified reference materials (CDN-ME-1811), duplicates, and blanks were inserted at a rate of 17% and investigated as part of the company’s quality assurance and quality control program.

Qualified Person

Dr. Mišković is the President and CEO of the company and the Company’s designate d Qualified Person within the meaning of National Instrument 43-101 Standards of Disclosure of Mineral Projects (“NI 43-101”). Dr. Mišković supervised the preparation of the information contained in this news release and validated that the information is factual and accurate.

About Terra Balcanica

Terra Balcanica is a polymetallic and energy metals exploration company targeting large-scale mineral systems in the Balkans of southeastern Europe and northern Saskatchewan, Canada. The Company has 90% interest in the Viogor-Zanik Project in eastern Bosnia and Herzegovina. The Canadian assets owned by its subsidiary Terra North Resources Corp. 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 imp lementing Good International Industry Practice (GIIP) and sustainable health, safety, and environmental management.