Tectonic launches 9,000 m phase 2 drilling at Flat

Mr. Tony Reda reports TECTONIC METALS ANNOUNCES PHASE TWO DRILLING AT FLAT GOLD PROJECT, ALASKA Tectonic Metals Inc. today provided an update on the 2025 phase 2 drill program at the company's flagship Flat gold project in southwestern Alaska. Flat covers 99,840 acres of predominantly native-owned land belonging to Doyon Ltd., one of Alaska's largest native regional corporations and Tectonic's second-largest shareholder. Flat is emerging as a potential Tier 1, free-milling, heap leachable gold mining opportunity strategically located near one of the world's largest undeveloped gold deposits, the Donlin gold project. Highlights of the 2025 phase 2 drill program Program timeline: Phase 2 drilling commenced on Aug. 15 and is scheduled to continue through late October, 2025. Three-rig program: Two diamond core rigs and one reverse circulation (RC) rig are currently operating with a target of 9,000-plus m of drilling. When combined with phase 1, Tectonic expects to complete over 16,000 metres in 2025, the largest drill campaign in both company and project history. Chicken Mountain priority: Systematic delineation drilling at Chicken Mountain to support a maiden mineral resource estimate. Alpha Bowl expansion: Follow-up and stepout drilling building on Alpha Bowl's 2024 discovery hole (65.5 metres at 1.2 grams per tonne Au, including 6.1 m at 6.0 g/t Au and 1.5 m at 21.7 g/t Au) and the first 2025 phase 1 assay result announced Sept. 10, 2025 (41.15 m at 2.23 g/t Au, including 21.34 m at 4.00 g/t Au with 4.57 m at 13.25 g/t Au). Exploration upside: Select drilling on new targets as warranted, with additional field mapping and prospecting. Year-round operations initiative: Significant investment in logistics and infrastructure to enable an early spring 2026 restart and lay the foundation for year-round operating capacity. Environmental stewardship: Development of an integrated environmental baseline study program in support of long-term planning. Peter Kleespies, vice-president of exploration, commented: "Phase 1 at Flat delivered on every objective, with over 7,700 metres drilled across multiple intrusion targets, and our very first hole of the 2025 returned two strong zones of mineralization, including high-grade gold such as 4.0 g/t Au over 21.34 m with 13.55 g/t Au over 4.27 m. Phase 2 builds on that momentum with systematic delineation drilling at Chicken Mountain -- the largest and most advanced system on the property -- while also stepping out at Alpha Bowl, where we have made one of Alaska's newest high-grade gold discoveries. Just as importantly, our investments in logistics and infrastructure will allow us to restart drilling as early as spring 2026 and transition Flat closer to year-round operations. Together, these programs are laying the foundation for Flat's first mineral resource estimate and a future preliminary economic assessment." Primary target: Chicken Mountain -- establishing the foundation for a maiden resource Scale and system: Chicken Mountain is a 6.5-kilometre-by-6.0-kilometre monzonite intrusion with over three km of drilled mineralized strike from 86 drill holes, more than half of which ended in gold mineralization, including two deep holes exceeding 400 m in length. Despite this, drilling to date has tested only a fraction of the Chicken Mountain intrusion, which is only one of six-kilometre scale intrusion targets across the 99,000 acre Flat land position. Evidence of a large gold system: Every creek draining from Chicken Mountain, including Alpha Bowl's Flat Creek, has historically yielded placer gold, underscoring the size and fertility of the system. Phase 2 design: Systematic section-based drilling with fences of diamond and RC (reverse circulation) holes across one km of strike. Drill orientations are optimized (azimuth 120 degrees, dips negative 55 degrees to negative 70 degrees) to cut the northeast-striking, west-dipping sheeted vein arrays identified during Tectonic's 2023 and 2025 oriented core programs. Objective: Deliver a supplementary data set that will assist in supporting a maiden mineral resource estimate and establish the technical foundation for a future preliminary economic assessment (PEA). Stock option grant The company also announces that it has granted a total of 260,000 incentive stock options to new employees of the company to purchase up to 260,000 common shares in the capital of Tectonic. The stock options have an exercise price of $1.25 per option share, vest over an 18-month period in three equal instalments every six months from the grant date and expire five years from the grant date. Qualified person Tectonic Metals' disclosure of technical or scientific information in this press release has been reviewed, verified and approved by Peter Kleespies, MSc, PGeo, vice-president of exploration, who is a qualified person in accordance with Canadian regulatory requirements set out in National Instrument 43-101. We seek Safe Harbor.