Tectonic Metals drills 4.50 g/t gold over 48.77 metres at New Target, Flat Gold Project, Alaska

Tectonic Metals Inc. [TSXV: TECT; OTCQB: TETOF] reported results from regional exploration drilling at four target areas on the company’s flagship 99,800-acre Flat Gold Project, southwest Alaska. These results are highlighted by the discovery of at-surface, high-grade gold mineralization at the Black Creek Intrusion Target located 6 km north of the company’s core Chicken Mountain intrusion.

Tectonic drill hole CMR25-059 returned 4.50 g/t gold over 48.77 metres, including a high-grade core of 7.79 g/t Au over 24.38 metres with 15.19 g/t Au over 6.10 metres, starting from surface. At present the intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Mineralization occurs as quartz veinlets and stringers hosted in hornfelsed, oxidized silltstones and intermediate dykes along the eastern contact of the Black Creek. This represents Tectonic’s first-ever drilling at Black Creek and marks the first drilling in the area since 2003, confirming a significant new gold zone that expands the known footprint of Flat’s reduced intrusion-related gold system (RIRGS).

Assay results from 20 exploration drill holes (3 diamond core holes and 17 reverse circulation (RC) holes) targeting regional intrusion targets, Black Creek, Jam, Golden Apex and the northern extension of the Alpha Bowl, are reported here.

“The Flat Gold Project continues to demonstrate the characteristics of a large, reduced intrusion-related gold system with multiple mineralized intrusive centers,” stated Tony Reda, President and CEO of Tectonic Metals.

“Our first pass drilling at Black Creek is transformative for several reasons. Hole CMR25-059 returned 4.50 g/t Au over 48.77 metres with 7.79 g/t Au over 24.38 metres beginning at surface, hosted in hornfelsed sediments along the intrusion margin. Importantly, this confirms high-grade gold in a fundamentally different host rock than the monzonite-dominant mineralization we have defined at Chicken Mountain and Alpha Bowl.

“Hornfelsed country rock occurs across key parts of the Flat gold system including the outer rim of the Chicken Mountain intrusion, Golden Apex, Horseshoe and Black Creek target areas. Tectonic’s discovery of high-grade gold at Black Creek provides clear proof that this lithological setting is highly prospective.

“Discovering broad, near-surface mineralization at Black Creek validates that Flat’s gold mineralization is not confined to a single intrusive center. Instead, we are seeing multiple expressions of gold mineralization developed across the broader volcano-plutonic complex, both within intrusions and along their thermally and chemically altered margins. In analogous intrusion-related gold systems, intrusion-contact and hornfels-hosted zones can represent important high-grade components, and our results at Black Creek highlight the value of systematically targeting this host rock as part of our district-scale exploration strategy.

“With multiple intrusion centers now demonstrating gold mineralization across varied geological settings, and with the Chicken Mountain-Alpha Bowl corridor extending to 3.3 km of drilled strike, we are now starting to see the true potential of what the Flat Gold Project can deliver.”

Black Creek Drill Highlights – CMR25-059: 15.19 g/t Au over 6.10 metres, within 7.79 g/t Au over 24.38 meytres, within 4.50 g/t Au over 48.77 metres, within 3.80 g/t Au over 57.91 metres and from surface, RC drill hole; total hole length 60.96 metres.

CMR25-057: 1.81 g/t Au over 6.10 m, within 0.68 g/t Au over 24.36 m, within 0.46 g/t Au over 50.29 m. RC drill hole; total hole length 71.63 m.

CMR25-062: 1.24 g/t Au over 3.05 m and 1.14 g/t Au over 9.14 m both within 0.80 g/t Au over 19.81 m , within 0.51 g/t Au over 33.53 m. RC drill hole; total hole length 94.49 m.

Alpha Bowl: Expanding the Chicken Mountain drilled mineralized strike to 3.3 km. Wide-spaced exploratory drilling (four RC holes and two diamond holes) expanded Alpha Bowl mineralized footprint 500 metres north from previously reported 2025 drill assay results, extending the drilled strike length of the Chicken Mountain- Alpha Bowl system to 3.3 km.

Mineralization begins at or near surface and remains open and unconstrained reinforcing the significant expansion and scale potential.

Drill Highlights – CMR25-123: 10.60 g/t Au over 1.52 m, within 3.08 g/t Au over 6.10 m , within 1.51 g/t Au over 13.72 m and 0.72 g/t Au over 4.57 m, within 0.53 g/t Au over 15.24 m. RC Drill hole, Ending in mineralization; total hole depth 188.89 m.

CMR25-124: 5.57 g/t Au over 1.52 m , within 0.63 g/t Au over 16.76 m and 1.74 g/t Au over 3.05 m, within 0.62 g/t Au over 12.19 m. RC drill hole; total hole depth 137.16m.

CMD25-035: 12.26 g/t Au over 1.00 m, within 0.71 g/t Au over 23.00 m. Diamond Drill hole; total hole depth 309.98 m.

Jam Intrusion Target – First Drilling Confirms Gold Zone: A regional RIRGS target located approximately 10 kms north of Chicken Mountain and north of the prolific placer gold producing Otter Creek.

Tectonic completed first-ever drilling at Jam with a two-hole RC fence targeting blind mineralized intrusion at depth along strike from the Nielsen Prospect. Both holes intersected augite basalt with quartz-sulphide veining from collar to total depth, returning multiple narrow >1.0 g/t Au intercepts within broader 10-25 metre mineralized envelopes.

CMR25-061: 1.52g/t Au over 3.05 m, within 0.59 g/t Au over 9.14m, and 1.48 g/t Au over 3.05 m and 3.56 g/t Au over 1.52 ending in mineralization; total RC drill hole length 103.63 m.

Exploration Significance: Results warrant detailed follow-up mapping and drilling to vector toward blind intrusion target at depth.

The Golden Apex Intrusion Target is located approximately 1 km northeast of the Alpha Bowl target, believed to represent an unexposed intrusion situated in a favorable structural position between two known intrusions, Chicken Mountain and Black Creek.

Three holes (two RC, one diamond) drilled in 2025 at Golden Apex were designed to test intrusion potential and follow up historic intercepts only on the eastern margin of the intrusion target. Drilling successfully identified key mineralized geological structures and alteration zones that provide critical vectoring information. These results will be integrated into advanced 3D lithological, structural, and geophysical models to refine drill targets and vector toward the interpreted blind intrusion at depth.

Assay results from 14 additional holes are pending. Remaining 2025 resource delineation drilling at Chicken Mountain; Tectonic will provide further updates as results are received, interpreted, and validated.