Mr. John Florek reports

SANKAMAP ANNOUNCES AIRBORNE GEOPHYSICAL SURVEY RESULTS HIGHLIGHTING PROMISING ANOMALIES

Sankamap Metals Inc. has completed data processing and reports from Expert Geophysics for the 374-line-kilometre airborne magnetotelluric electromagnetic survey completed in July, 2025. The survey covered 3,500 hectares of Sankamap's 4,500-hectare Kuma property (populated areas excluded) located 37 kilometres southeast of Honiara in south-central Guadalcanal, Solomon Islands.

Chief executive officer John Florek commented: "We are very encouraged by the results of the airborne geophysical survey, which reveal clear signatures consistent with porphyry-style mineralization. The strong alignment between these geophysical features, surface geochemistry and alteration mapping gives us greater confidence in the continuity of mineralization at depth and helps refine our upcoming drill targets."

Highlights:

• The results of the mobile MT survey at Kuma reveals a broad five-by-two-kilometre ring-shaped zone of high conductivity that flanks a central two-by-three-kilometre highly resistive feature, with the conductive feature spatially correlating to the mapped lithocap.
• Geophysical data indicate potential for multiple intrusive centres and porphyry systems while the alignment of magnetic and conductive trends suggests structural controls or fluid pathways associated with mineralization.
• The resistive and conductive trends display typical porphyry signatures, similar to other economic porphyry systems currently being mined.

The results from the 2025 mobile MT survey delineate resistive and conductive features consistent with porphyry, epithermal and skarn-style mineral systems. The geophysical data further corroborate earlier surface exploration findings at the Kuma property, which delineated a well-developed lithocap exceeding two kilometres in extent. Hyperspectral analysis has outlined extensive phyllic, argillic and advanced argillic alteration zones while grab sampling has returned impressive assay results of up to 11.7 per cent copper and 13.5 grams per tonne gold, underscoring the strength and continuity of mineralization within the system.

The Kuma project is strategically located along a highly prospective trend that hosts several major deposits: Lihir containing 71 million ounces Au (310 million tonnes containing 23 Moz Au at 2.3 g/t proven plus probable, 520 Mt containing 39 Moz Au at 2.3 g/t Au indicated, 81 Mt containing five Moz Au at 1.9 g/t Au measured and 61 Mt containing 4.9 Moz Au at 2.3 g/t Au inferred) and Panguna containing 19.3 Moz Au plus 5.3 Mt Cu (1.5 Mt containing 16.1 Moz Au at 0.33 g/t Au and 4.6 Mt Cu at 0.3 per cent Cu indicated, and 300 Mt containing 3.2 Moz Au at 0.4 g/t Au and 700,000 tonnes Cu inferred). Both share geological similarities to the Kuma project.

Technical discussion

Porphyry Cu-Au systems can exhibit a broad spectrum of electromagnetic responses, reflecting different host rocks, alteration styles, erosional levels and geological conditions unique to each system. For example, systems with intact lithocaps, which is potentially the case at Kuma, often differ from those with eroded or exposed mineralized cores, producing either predominantly conductive or resistive EM signatures.

As at Kuma, most calc-alkaline porphyry systems exhibit elevated electrical conductivity, largely attributable to extensive pyritic halos and mica-rich alteration zones that envelop a potassic core. This core typically appears as a distinctly resistive feature, reflecting zones of magnetite or K-feldspar alteration characterized by relatively low sulphide concentrations.

In July, 2025, Expert Geophysics was engaged to conduct a 374-line-kilometre airborne geophysical survey (mobile MT), which was flown along north-south lines at 100-metre intervals.

The final geophysical data processing has been completed. Sankamap, together with Expert Geophysics and independent geophysical consultants familiar with this type of data, has reviewed the results. The survey highlights several significant geophysical features that will assist in defining the next phase of exploration and drill targeting.

The geophysical models reveal a highly conductive feature that forms a continuous ring-shaped zone flanking a central resistive body. This conductive anomaly appears consistent with a potassic intrusive core or a resistive intrusive complex at depth. Notably, the highest conductivity corresponds with surface zones of advanced argillic and clay-mica alteration.

The conductivity and resistivity highs coincide with a previously mapped annular topographic depression, suggesting potential preferential erosion within the propylitic alteration zone surrounding a core of phyllic-altered rocks. The alignment of these geophysical, geological and geomorphological features supports a coherent porphyry-style hydrothermal model, with a resistive intrusive core surrounded by conductive alteration halos and erosional depressions marking outer alteration zones.

The integration of these data sets provides a strong 3-D framework for continuing exploration and drill targeting.

Strategic plan:

• $4.7-million financing closed (Oct. 3, 2025, press release), positioning Sankamap to advance exploration programs beginning in November;
• Acquisition and deployment of drilling equipment under way in preparation for the January, 2026, drilling campaign.

Kuma property:

• Target refinement: continuing analysis of newly released geophysical and geological data sets to define and prioritize high-quality drill targets;
• Pad and camp construction: scheduled to begin in late November;
• Field visit: planned for early November to ground-truth targets, verify geological interpretations and finalize logistics;
• Drilling program: inaugural campaign to commence in January, 2026, marking a key milestone in advancing the Kuma project toward discovery.

Fauro property:

• Prospecting activities to begin, following up on additional magnetic highs associated with elevated gold and copper values (see press release dated July 16, 2025).

Corporate and investor relations:

• Coming exploration milestones to serve as key catalysts for shareholder value creation;
• Targeted marketing campaign under way to showcase the company's exploration potential and investment opportunity.

Grant of options

Subject to regulatory approval, the company has granted 2.25 million stock options to its directors, officers and consultants, exercisable for five years at a price of 30 cents.

About Sankamap Metals Inc.

Sankamap is a Canadian mineral exploration company dedicated to the discovery and development of high-grade copper and gold deposits through its flagship Oceania project, located in the South Pacific. The company's fully permitted assets are strategically positioned in the Solomon Islands, along a prolific geological trend that hosts major copper-gold deposits, including Newmont's Lihir mine, with a resource of 71.9 million ounces of gold (310 Mt containing 23 Moz Au at 2.3 g/t P+P, 520 Mt containing 39 Moz Au at 2.3 g/t Au indicated, 81 Mt containing five Moz Au at 1.9 g/t Au measured and 61 Mt containing 4.9 Moz Au at 2.3 g/t Au inferred).

Exploration is actively advancing at both the Kuma and Fauro properties, part of Sankamap's Oceania project in the Solomon Islands. Historical work has already highlighted the mineral potential of both sites, which lie along a highly prospective copper and gold-bearing trend, suggesting the possibility of further, yet-to-be-discovered deposits.

At Kuma, the property is believed to host an underexplored and largely untested porphyry copper-gold system. Historical rock chip sampling has returned consistently elevated gold values above 0.5 g/t Au, including a standout sample assaying 11.7 per cent Cu and 13.5 g/t Au, underscoring the area's significant potential.

At Fauro, particularly at the Meriguna target, historical trenching has returned highly encouraging results, including 8.0 metres at 27.95 g/t Au and 14.0 metres at 8.94 g/t Au. Complementing these results are exceptional grab sample assays, including historical values of up to 173 g/t Au, along with recent sampling by Sankamap at the Kiovakase target, which returned numerous high-grade copper values, reaching up to 4.09 per cent Cu. In addition, limited historical shallow drilling intersected 35.0 metres at 2.08 g/t Au, further underscoring the property's strong mineral potential and the merit for continued exploration. With a commitment to systematic exploration and a team of experienced professionals, Sankamap aims to unlock the untapped potential of underexplored regions and create substantial value for its shareholders.

Qualified person disclosure

The technical content for the Oceania project in this news release has been reviewed and approved by John Florek, MSc, PGeol, a qualified person in accordance with Canadian Institute of Mining, Metallurgy and Petroleum guidelines. Mr. Florek is in good standing with the Professional Geoscientists of Ontario (member ID: 1228) and a director and officer of the company.

We seek Safe Harbor.