Tectonic Metals Drills 2.41 g/t Au over 59.44 metres, Including 11.82 g/t Au over 10.67 metres and 39.96 g/t Au over 3.05 metres at Alpha Bowl, Flat Gold Project, Alaska

VANCOUVER, BC / ACCESS Newswire / October 15, 2026 / Tectonic Metals Inc. ("Tectonic" or the "Company") (TSXV:TECT)(OTCQX:TETOF) today announced results from 19 drill holes at Chicken Mountain, the most advanced of six kilometre-scale intrusion targets at the Company's flagship 99,840-acre Flat Gold Project ("Flat") in southwest Alaska, U.S.

Drilling continues to deliver broad, near-surface gold mineralization with substantial higher-grade intervals at Alpha Bowl and Adit, two priority zones within Chicken Mountain's mineralized footprint, which extends 3.3 kilometres ("km") in length and up to 700 metres ("m") in width, and has been drill-tested to a vertical depth of 300 m.

Today's results are highlighted by:

• Adit Zone: 1.52 g/t Au over 42.67 m, including 27.35 g/t Au over 1.52 m and 3.84 g/t Au over the final 13.72 m of the hole, where higher-grade mineralization remains untested beyond the end of the hole.

The results support the potential for near-surface, bulk-tonnage gold mineralization with higher-grade domains that could be relevant to future starter-pit evaluations. Drilling has also identified gold-bearing hydrothermal brecciation at Adit, adding a potentially important mineralization style and new exploration targets at Chicken Mountain.

Tectonic has completed more than 29,000 m of drilling in 2026 to advance resource delineation and expansion at Chicken Mountain, with drilling planned through the end of October. This release reports approximately 2,650 m from 19 holes (18 reverse-circulation ("RC") and one diamond-core) at Alpha Bowl and Adit Zone (Figure 1).

In addition to today's results, upcoming catalysts include: assays for 114 drill holes (approximately 22,000 m), column-leach test results and a maiden mineral resource estimate ("MRE") targeted for Q1 2027, followed by a Preliminary Economic Assessment ("PEA") targeted for Q2 2027.

Tony Reda, Co-Founder, President & CEO, commented:

"What continues to excite us is the scale emerging at Chicken Mountain. Alpha Bowl alone spans approximately 820 metres along strike, up to 600 metres in width, and has been drill-tested to a vertical depth of over 300 metres. These are substantial dimensions for an individual gold exploration target, yet Alpha Bowl represents just one part of Chicken Mountain's broader 3.3-kilometre mineralized system. Together with Adit and other mineralized zones, the results continue to demonstrate the potential for a large-scale gold system with multiple higher-grade centres.

"We have tremendous momentum at Flat: 114 drill holes awaiting assays, drilling planned through the end of October, important column-leach results on the horizon and our maiden Mineral Resource Estimate in Q1 2027, followed by a Preliminary Economic Assessment in Q2 2027. The volume of new geological and metallurgical information still to come represents an exciting opportunity to deepen our understanding of this emerging gold system, refine our exploration and development strategy and potentially unlock further value across the 99,840-acre Flat property."

Alpha Bowl Highlights

Alpha Bowl, the northern extension of the Chicken Mountain intrusion (see news release dated January 15, 2026)¹, encompasses a mineralized footprint approximately 820 m along strike and 600 m wide, with gold intersected to at least 300 m depth. The latest drilling has identified significant higher-grade gold mineralization near surface, supporting Alpha Bowl as a target for future starter-pit evaluation (Figures 3 and 4).

• Expansion and Delineation Underway: Assays are pending from three holes east of CMR26-170, while ongoing drilling at approximately 100 m spacing is testing the lateral extent, geometry and continuity of mineralization.

The combination of broad surface-starting intersections, locally substantial grades and a large mineralized footprint positions Alpha Bowl as a priority target for delineating higher-grade zones within a potential bulk-tonnage, open-pit gold system.

Adit Zone Highlights

The Adit Zone is a priority gold-bearing corridor associated with a major structural contact between the medium-grained Chicken Mountain and coarse-grained Alpha Bowl monzonites. Building on the 2025 discovery intersection of 4.05 g/t Au over 30.48 m in CMR25-121 (see news release dated December 22, 2025)³, the 2026 program is delineating mineralization along this contact and toward Alpha Bowl.

Adit Main

New 2026 RC drilling continues to intersect broad, near-surface gold mineralization with locally substantial higher-grade intervals:

• CMR26-160: 0.90 g/t Au over 73.15 m from surface, including 2.14 g/t Au over 21.34 m and 6.97 g/t Au over 4.57 m.
• CMR26-161: 0.70 g/t Au over 45.72 m from surface, including 1.14 g/t Au over 16.76 m, plus a separate deeper interval of 0.69 g/t Au over 15.24 m, including 4.95 g/t Au over 1.52 m. Drilled at a steeper angle from the same collar as CMR26-160, this hole helps constrain mineralization geometry.
• CMR26-162: 1.06 g/t Au over 19.81 m, including 1.71 g/t Au over 10.67 m, followed by a separate interval of 0.64 g/t Au over 33.53 m, extending to the end of the hole.
• CMR26-163: 1.52 g/t Au over 42.67 m, including 27.35 g/t Au over 1.52 m and 3.84 g/t Au over the final 13.72 m of the hole.
• CMR26-171: 0.66 g/t Au over 35.05 m, including 1.00 g/t Au over 18.29 m and 1.63 g/t Au over 9.14 m, with mineralization extending to the end of the hole.

These results further support the Chicken Mountain-Alpha Bowl intrusive contact as a priority exploration target, with broad mineralized intervals and localized higher-grade concentrations suggesting structural and lithological controls on gold distribution. Notably, CMR26-162, CMR26-163 and CMR26-171 all ended in mineralization, including CMR26-163, which returned 3.84 g/t Au over its final 13.72 m, leaving the extent of these intersections unresolved (Figures 5 and 6).

The combination of near-surface mineralization, higher-grade internal intervals and multiple drill holes ending in mineralization supports Adit Main as a target for delineating bulk-tonnage gold mineralization with higher-grade domains. Follow-up drilling will establish continuity along the intrusive contact, extend mineralization beyond current drill limits and evaluate the potential for near-surface higher-grade zones that could contribute to future starter-pit evaluation.

Gold-Bearing Breccia Expands Exploration Targets

Diamond hole CMD26-054 intersected 0.73 g/t Au over 43.50 m, including 1.22 g/t Au over 15.00 m, within a multi-stage hydrothermal breccia interpreted to have formed through repeated episodes of faulting, brecciation and veining. The hydrothermal intersection in drill core shows multistage faulting with veins and brecciation and later carbonate and iron staining (see Figures 7 to 11).

Within Chicken Mountain's interpreted reduced intrusion-related gold system ("RIRGS"), areas where intrusive contacts, faulting and hydrothermal brecciation coincide create additional targeting opportunities. Such sites may have provided localized pathways for gold-bearing fluids and could host mineralized bodies with different geometries from the surrounding sheeted-veinlet arrays.

Tectonic drilled follow-up holes at 100 m spacing to test the breccia's extent, its relationship to neighbouring mineralization and whether repeated brecciation and veining are associated with gold enrichment. If demonstrated, these relationships could improve targeting of additional mineralized volume and local higher-grade zones along the Adit corridor. Assays are currently pending for CMD26-064 and CMD26-066.

The recognition of this hydrothermal breccia-hosted mineralization is significant because it suggests that mineralizing fluids were active within the system for a prolonged period and capable of multiple mineralizing events. This newly recognized style of mineralization adds an important development to the geologic and mineral model and expands the Company's exploration potential.

Adit West

The Adit Zone structural contact is interpreted to extend westward along a corridor of coincident soil-geochemical and geophysical anomalies, defining a priority exploration target. Anomalous gold was intersected in seven of eleven holes, and this target remains insufficiently tested. Follow-up drilling from more favourably positioned drill pads will test the continuity and mineralization potential along the Adit West trend.

Drill results for the Adit Zone are shown in Figures 5 and 6.

Near-Term Catalysts

Drilling is expected to continue through the end of the field season in late October, supporting a steady flow of assay results through year-end. The assay pipeline is substantial, with 114 additional drill holes currently in the laboratory queue representing 22,000 m of the 2026 drill program.

Results from the regional soil-sampling program are also pending and will help refine and prioritize exploration targets beyond the current drilled footprint at Flat.

Drilling results and pending column-leach testing will inform the Company's maiden MRE targeted for Q1 2027, and the PEA targeted for Q2 2027.

Maps and Multimedia

• Chicken Mountain Drill Plan Maps and Images
• Chicken Mountain Drill Plan Video

Figure 1: Regional geology map of the Flat Gold Project and map of the Chicken Mountain intrusion drilling area. Holes in green are new assays from 2026 up to and including this news release.

Figure 2: Chicken Mountain plan view and long section showing the mineralized drill results, 3.3 km drilled strike extent drilled to 300 m vertical depth.

Figure 3: Location of Alpha Bowl drilling. Multiple holes with pending assays in the target area.

Figure 4: Cross section L1-L1′, looking north, showing CMR26-170 and mineralization (300 m envelope clipping).

Figure 5: Location of Adit Zone drilling and Adit Zone West exploration holes.

Figure 6: Cross section L2-L2', looking North, showing Adit Zone drilling.

Figure 7: Photographs of hydrothermal breccia in CMD26-054 from 126.0 m to 131.26m: Beginning of breccia can be correlated with Class 1 fault, followed by veining and brecciation.

Figure 8: CMD26-054 exhibiting primary crustiform and colloform banding.

Figure 9: CMD26-054 angular wallrock clasts with silica cement at 128.45 m depth.

Figure 10: CMD26-054 veins and fragments at 137 m depth.

Figure 11: CMD26-054 late carbonate veining and iron staining shown as rusty overprint at 134 m depth

Table 1: Assay Highlights