Dr. Aleksandar Miskovic reports

TERRA BALCANICA DRILLS 102 G/T AG EQ OVER 2.55 M AT CUMAVICI RIDGE AND EXTEND MINERALIZED FOOTPRINT IN BOSNIA AND HERZEGOVINA

Terra Balcanica Resources Corp. has released initial high-grade assay results from the phase III drill campaign at the Cumavici Ridge epithermal vein zone within its principal Viogor-Zanik project in Bosnia and Herzegovina.

Highlights:

• Drill hole CMV25001 intersected 102 grams per tonne (g/t) silver equivalent (AgEq) over 2.55 metres (m) within a broader zone of 64 g/t AgEq over 4.7 m from 66 m (see table 1) and including 0.4 m wide epithermal mineralized zone with 453 g/t AgEq over 0.4 m;
• Strike length extended to 95 m from CMV23004, which returned 1,168 g/t AgEq over 1.35 m. Further drilling at Cumavici returned highlights of:
  • 505 g/t AgEq over 11 m (CMVDD004);
  • 824.2 g/t AgEq over four m (CMVDD001);
  • 284 g/t AgEq over 10 m (CMVDD005; see the company's news releases dated Sept. 8, 2022, and Oct. 22, 2025, as well as Feb. 2, 2023, and Feb. 27, 2023);
• The mineralization remains open northwest and downdip to the southwest;
• Additional phase III assays from diamond drill holes at Cumavici Ridge and Brezani targets will be released imminently.

Terra Balcanica chief executive officer Dr. Aleksandar Miskovic commented: "We are very pleased to have extended the footprint at the high-grade Chumavichi Ridge system by continuing to intercept the mineralized horizon. Again, the epithermal, fault-hosted mineralization was intercepted shallowly highlighting the potential of this southwest-dipping structure, a high-grade, close-to-surface silver- and base-metal-rich target. Our work testing the along strike and downdip extent of the Cumavici mineralization continues with more assays which Terra will report soon."

Drill core Observations

The zone of mineralization from 64 m to 73 m is characterized by a fault-hosted hydrothermal breccia. The structure crosscuts a package of andesites and volcanic tuffs. This has created breccia and fault gouge is present at the margins of the structure, which hosts the mineralization. A 0.4 m interval from 69.1 m presents as massive sulphides of sphalerite-galena-stibnite-pyrite with sulphide stringers extending into the clay altered volcanics in the hangingwall and footwall of the host structure. Drilling has importantly confirmed further continuation of the Cumavici mineralization, which was confirmed as present on Cumavici Crest over 500 m northwest.

Geology of Cumavici

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

The phase III drilling has confirmed three polymetallic systems so far exploration at Cumavici: Joseva, Cumavici Crest and the flagship vein system at Cumavici Ridge. Mineralization is characterized by sphalerite-stibnite-galena and further sulphosalts minerals, which are associated with quartz and calcite veining and breccia cement. The mineralization occupies faults that crop out at surface as distinctive topographic lows, coinciding with magnetic lows and often with mineralization visible within fault gouge.

QA/QC (quality assurance/quality control)

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 per cent less than two millimetres (mm), rotary split one kilogram (kg) and pulverizing the split to greater than 85 per cent passing 75 microns. Gold was assayed by 30-gram (g) fire assay with ICP-AES (inductively coupled plasma atomic emission spectroscopy) finish (Au-ICP21). Analyses of silver and base metals were completed by highly oxidizing 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) and blanks, were inserted at a rate of 9 per cent and investigated as part of the company's quality assurance and quality control program.

Qualified person

Dr. Aleksandar Miskovic, PGeo, is the company's designated qualified person for this news release within the meaning of National Instrument 43-101, Standards of Disclosure of Mineral Projects. Dr. Miskovic has reviewed and validated the information contained in this news release as factual and accurate.

Advertising engagement

The company engaged Orsus Consult GmbH, based out of Bayreuth, Germany, in July of 2025, for three days of digital advertising for 25,000 euros.

About Terra Balcanica Resources Corp.

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 a 90-per-cent interest in the Viogor-Zanik project in eastern Bosnia and Herzegovina. The Canadian assets owned by its subsidiary comprise a 100-per-cent-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 pro-actively implementing good international industry practice (GIIP), and sustainable health, safety and environmental management.

We seek Safe Harbor.