Tectonic Metals drills 5.09 g/t Au over 21.34 m at Black Creek, Flat Gold

Multiple High-Grade Drill Intercepts, Broad Intervals and Holes Ending in Mineralization Signal a Growing Gold System; Six Additional Drill Holes Pending

VANCOUVER, BC / ACCESS Newswire / August 25, 2026 / Tectonic Metals Inc. (" Tectonic " or the " Company ") (TECT:TSXV)(TETOF:OTCQB)(T15B:FSE) today reported new drill assay results from Black Creek, one of six intrusion-related district targets located within the Company's flagship 99,840-acre Flat Gold Project (" Flat ") in southwest Alaska, U.S. The results confirm a second consecutive season of high-grade gold mineralization at Black Creek and strengthen the Company's view that the target has the potential to emerge as a second gold intrusive centre at Flat, approximately six kilometres ("km") northeast of the main bulk-tonnage, heap leach Chicken Mountain target.

2026 Black Creek Drill Assay Highlights

CMR26-152: 5.09 grams per tonne gold ("g/t Au") over 21.34 metres ("m") including 17.34 g/t Au over 6.10 m ;

CMR26-153: 1.89 g/t Au over 57.91 m , including 2.75 g/t Au over 38.10 m with 6.31 g/t Au over 7.62 m and 3.89 g/t Au over 6.10 m ; and,

CMD26-041: 3.26 g/t Au over 5.06m and 16.73 g/t Au over 2.20 m , including 29.91 g/t Au over 1.22 m.

Importantly, both reverse-circulation ("RC") holes CMR26-152 and CMR26-153 ended in mineralization, providing clear opportunities to expand the system further at depth and along strike.

Multimedia

Black Creek Drill Plan Maps and Images

Black Creek Drill Plan Video

Assays are also pending from six additional Black Creek drill holes, including holes that intersected prospective hornfels and mafic dykes, features typically associated with higher-grade mineralization at Black Creek and other Reduced Intrusion Related Gold Systems (RIRGS).

The latest results build on Black Creek's initial 2025 drilling, reported by the Company on