Mr. David Grondin reports

TOMAGOLD LAUNCHES STRATEGIC DRILLING CAMPAIGN ON ITS CHIBOUGAMAU PROJECTS

TomaGold Corp. has begun its drilling program on its Chibougamau projects in Quebec. As outlined in its June 20, 2025, press release, the company has initiated a 53-hole exploration drilling program targeting its key projects, namely Obalski, Berrigan mine, Radar, David and Dufault, with the goal of uncovering new gold-copper mineralization on strategically selected, well-defined targets.

Results from 3-D geological and structural interpretation on Obalski

TomaGold is also pleased to announce the results of its most recent 3-D geological and structural interpretation of the Obalski project, located two kilometres south of Chibougamau, Que., within the mineral-rich Abitibi greenstone belt.

This comprehensive modeling effort led to the identification of multiple copper-gold (Cu-Au) mineralized zones controlled by well-defined shear systems, offering substantial upside for future exploration and drilling. This work integrates historical drilling data, geophysical surveys (resistivity and metal factor) and structural interpretation, resulting in a refined geological framework for the project that confirms several high probability yet untested mineralized targets.

TomaGold's chief executive officer, David Grondin, stated: "This model provides us with a far more detailed and accurate picture of the lithological, structural and mineralization architecture at Obalski. It confirms historical mineralization trends and identifies a series of compelling, high-confidence exploration targets observed elsewhere in the Chibougamau mining camp, based on recent work by the TomaGold technical team. We now have a clear roadmap to expand mineralized zones with precision-guided exploration using surface bedrock and soil sampling, outcrop stripping and sampling, and SONIC and diamond drilling."

Technical highlights and key conclusions

The updated geological model successfully reconciles decades of reportedly dissimilar and inconsistent data sets into a unified and standardized 2-D and 3-D framework of lithologies, structures, mineralization, geochemistry and assay results. This integration significantly improves confidence in target definition and enhances geological continuity across the project.

Key findings:

1. Identification of two major shear systems

The interpretation confirms the presence of two dominant shear systems:

• A north-110-degree-(southeast-northwest)-trending shear structure associated with copper-gold mineralization in quartz veins and chlorite-carbonate altered zones;
• A younger 020-degree-(northeast-southwest)-trending shear that offsets the former structure and appears to host predominantly gold mineralization.

The intersection of these two systems creates structurally favourable zones with increased permeability, representing high-priority targets for hydrothermal fluid migration and metal deposition.

2. Spatial association between mineralization and intrusive contacts

Numerical models of copper assays revealed that Cu enrichment is concentrated along the margins of intrusive units -- particularly dioritic and granitic contacts. These observations support a genetic link between magmatic activity and mineralization. The highest assay clusters occur near structurally disrupted intrusive contacts.

3. Well-defined mineralized zone and orientation

The integrated model delineates a mineralized zone trending north-northeast with a moderate plunge of approximately 32 degrees toward the east. This geometry aligns with regional shear zones and provides a clear vector for down-plunge drilling extensions.

4. Predictive mineralization modelling validates untested high-potential zones

The 3-D distance-based predictive model combines geophysics, lithology and geochemistry to estimate the probability of mineralization. The zones with the highest potential for mineralization are concentrated along structural intersections and lithological boundaries between pillowed volcanics and intrusive rocks.

Exploration upside and targeting strategy

The integration of geological, structural and assay data defines multiple high-priority exploration targets, which are summarized as follows:

• Structural intersections of the north-110-degree- (southeast-northwest) and northeast-southwest-trending shears offer the greatest potential for mineralized shoots.
• Intrusive-volcanic contacts (especially where sheared) consistently correlate with higher copper and gold grades.
• Down-plunge extensions along the 32-degree plunge trend remain open and underdrilled.
• The southeastern area of the project, where folding and intrusive complexity are observed (potential dioritic trap), presents a newly recognized exploration opportunity.
• Parallel, underexplored structures may host additional mineralized lenses.

This targeting strategy is supported by both structural logic and assay correlations, enhancing drill efficiency and reducing exploration risk.

Recommendations and next steps

To optimize future exploration success, the report recommends the following:

• Increasing the assay dataset through systematic sampling of drill holes, particularly across lithological and structural contacts;
• Standardizing core logging protocols, with a focus on alteration, structure and geochemical pathfinder elements;
• Relogging historic cores with updated multielement and trace element geochemistry (for example, pXRF and spectral analysis);
• Expanding geophysical coverage, including high-resolution passive and active seismic surveys (in collaboration with the Smart Exploration Centre);
• Widening the geochemical scope beyond Au and Cu to include Ag (silver), Zn (zinc), Bi (bismuth), Te (tellurium) and other pathfinder elements.

These recommendations aim to improve the definition and confidence in currently modelled mineralized zones while identifying new areas of potential.

The technical content of this press release has been reviewed and approved by Jean Lafleur, PGeo, the company's vice-president of exploration and a qualified person under National Instrument 43-101.

About TomaGold Corp.

TomaGold is a Canadian junior mining company focused on the acquisition, exploration and development of high-potential precious and base metal projects, with a primary focus on gold and copper in Quebec and Ontario. The company's core assets are located in the Chibougamau mining camp in Northern Quebec, where it owns the Obalski gold-copper-silver project and holds options to acquire 12 additional properties, including the Berrigan mine, Radar, David and Dufault projects. TomaGold also holds a 24.5-per-cent joint venture interest in the Baird gold property near the Red Lake mining camp in Ontario. In addition, the company has lithium and rare-earth element (REE) projects in the James Bay region, strategically positioned near significant recent discoveries.

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