Tectonic Metals Inc. (TSX-V: TECT) (OTCQB: TETOF) today announced results from regional exploration drilling at four target areas on the Company’s flagship 99,800-acre Flat Gold Project in Southwest Alaska.  These results are highlighted by the discovery of at-surface, high-grade gold mineralization at the Black Creek Intrusion Target located six kilometres (“km”) north of the Company’s core Chicken Mountain intrusion.

Tectonic drill hole CMR25-059 returned 4.50 g/t Au over 48.77 metres, including a high-grade core of 7.79 g/t Au over 24.38 m with 15.19 g/t Au over 6.10 m, 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.

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

HIGHLIGHTS

• Black Creek is one of six kilometre-scale intrusion targets within the Flat volcano-plutonic complex

• Tectonic’s first-ever drilling at Black Creek delivers:  4.50 g/t Au over 48.77 metres, including 7.79 g/t Au over 24.38 metres and 15.19 g/t Au over 6.10 metres from surface

• High-grade gold drilled at Black Creek six kilometres north of Chicken Mountain and confirming the Flat gold system is not confined to a single intrusion

• High-grade gold intersected in hornfelsed sediments confirms a new prospective host rock, expanding target potential across other hornfels-bearing areas, including the outer margins of the Chicken Mountain, Alpha Bowl, Golden Apex, Horseshoe and Black Creek intrusions

• Drilling has now confirmed gold mineralization across five intrusions targets within the Flat volcano-plutonic complex: Chicken Mountain, Alpha Bowl, Golden Apex, Black Creek, and Jam

• Alpha Bowl drilling extends Chicken Mountain-Alpha Bowl mineralized strike length to 3.3 kilometres – remains open in all directions

• First-ever drilling at Jam target intersects multiple gold zones in volcanic rocks 10 kilometres north of Chicken Mountain

• Results from 14 additional Chicken Mountain drill holes still pending

CEO Commentary

“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 kilometres of drilled strike, we are now starting to see the true potential of what the Flat Gold Project can deliver.”

High-Grade Gold Drilled at Black Creek – A Kilometre-Scale RIRGS Regional Target

1. New Prospective Host Rock Confirmed
   • Discovery hole CMR25-059 intersected high-grade gold in hornfelsed siltstones along the eastern contact of the Black Creek intrusion – a different host rock than the monzonite-dominant mineralization defined at Chicken Mountain and Alpha Bowl
   • Hornfelsing of shallow marine Kuskokwim Group clastic sediments comprising variable shale through sandstones units occurs across the outer margins of multiple exposed intrusions at Flat, including Chicken Mountain and Black Creek and occurs extensively in the Golden Apex, Horseshoe, Jam and Caribou intrusion target areas
   • In analogous intrusion-related gold systems worldwide, hornfels-hosted and intrusion-contact zones commonly may represent important high-grade components of major gold systems

2. Multiple Intrusive Centers Validated
   • Black Creek is one of six kilometre-scale intrusion targets identified within the 20+ kilometre Flat volcano-plutonic complex
   • Discovery of near-surface, high-grade gold at Black Creek six kilometres north of Chicken Mountain confirms gold mineralization is not confined to a single intrusive center
   • Drilling has now confirmed gold mineralization across five intrusive centers within the Flat volcano-plutonic complex: Chicken Mountain, Alpha Bowl, Golden Apex, Black Creek, and Jam

3. High-Grade Gold at Surface
   • A nine-hole RC fence drilled across the eastern margin of the intrusion intersected a sequence of hornfelsed siltstones, intermediate dykes, and marginal gabbro and monzodiorite intrusion phases (see Figure 2)
   • Gold mineralization was intersected throughout the drilled section, with strongest mineralization hosted within quartz stringer zones hosted in hornfelsed, oxidized siltstones, particularly proximal to intermediate dyking
   • Open for expansion in all directions, 1,500-metre-long by 100-metre-wide historic soil anomaly
   • Coincident with 2.3 km × 1.5 km resistive electromagnetic anomaly covering mapped intrusive phases and hornfels

4. Historic Gold Endowment
   • Area includes the historic “Golden Horn” lode mine, which produced 2,707 ounces of gold at 12.00 g/t Au between 1925 and 1938¹
   • Black Creek intrusion considered a major bedrock source of placer gold from Black Creek (27,900 oz Au) and upper Otter Creek (417,000 oz Au)²
   • Historic drilling and trenching returned encouraging results, but systematic exploration had not been conducted since 2003
   • Tectonic’s first drilling campaign validates and significantly upgrades this historic target

Flat Gold Project Regional Targets Overview Video and Figures: Please watch a video highlighting the scale and potential of the Flat Gold Project: Click Here to View Video

Drill Plan Maps and Images: Click Here to View. Select images below.

Black Creek Drill Highlights

CMR25-059

• 15.19 g/t Au over 6.10 m, within
• 7.79 g/t Au over 24.38 m, within
• 4.50 g/t Au over 48.77 m, within
  1. 3.80 g/t Au over 57.91 m
  2. From surface, RC drill hole; total hole length 60.96 m

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 Kms

Wide-spaced exploratory drilling (four RC holes and two diamond holes) expanded Alpha Bowl mineralized footprint 500 m north from previously reported 2025 drill assay results, extending the drilled strike length of the Chicken Mountain- Alpha Bowl system to 3.3 kms (see Figure 3).

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 mand
• 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 mand
• 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 309.98m

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 (see Figure 1).

Geological Framework

• Coincident with a 3.4 km × 5.5 km resistive electromagnetic anomaly covering volcanic rocks, hornfels, and gabbro

• Historic “Nielsen Prospect” shallow shaft with rock chip samples from muck piles returning up to 5.05 g/t Au

• The Jam target area is thought to be the bedrock source of placer gold production² of 2,000 oz from Malamute Pup, which drains into Otter Creek from the north

• Area represents an uplifted, upper-level equivalent to the Chicken Mountain system-monzonite intrusions suspected at depth

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 (see Figure 4).

CMR25-061

• 1.52g/t Au over 3.05 m, within
• 0.59 g/t Au over 9.14mand
• 1.48 g/t Au over 3.05 mand
• 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.

Golden Apex Intrusion Target

The Golden Apex 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.

Target Framework & Historic Significance

• Outlined by a 2.5 km × 2.5 km resistive electromagnetic anomaly
• Historic placer production of 682,000 oz Au from Flat, Slate, and Black Creek drainages² validating substantial bedrock gold sources in the area
• Mapped mineralized hornfels units with grab samples assaying 2.68 g/t Au, suggesting favorable setting for blind intrusion at depth
• Historic drill hole GA03-02 intersected 1.08 g/t Au over 13.33 m and 1.00 g/t Au over 22.86 m demonstrating the presence of gold mineralization within the structural block and supporting the interpretation of a blind intrusion target at depth

2025 Results

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.

News Release Drill Results Summary

A summary of the results released today for the 17 RC holes are presented by drill section in Table 1, and a summary of the three diamond drill core results are presented in Table 2.  Full assay results for the 17 RC and three core results can be found at this link: Click Here for Full Assay Results.

Data pertaining to locations of drill holes included in the announcement are presented in Table 3.

Flat Gold Project Regional Targets Overview Video and Figures: Please watch a video highlighting the scale and potential of the Flat Gold Project: Click Here to View Video

Drill Plan Maps and Images:  Click Here to View. Select images below.

Assay Results From 14 Additional Holes Pending

• Remaining 2025 resource delineation drilling at Chicken Mountain
• Tectonic will provide further updates as results are received, interpreted, and validated

To learn more about the 2025 Drill Programs, click here: Tectonic Metals Delivers Record 18,372 Metres Across 125 Drill Holes at Flat Gold Project, Alaska

Figure 1: Oblique view of the Flat Project Area, highlighting the results from Jam, Black Creek, Alpha Bowl, Adit, and Chicken Mountain, drill results and pending drill hole assays can be viewed at: CLICK HERE TO VIEW FIGURE 1

Figure 2: Cross Section Looking North of Black Creek Drilling Line, highlighting drill results and higher-grade corridors can be viewed at: CLICK HERE TO VIEW FIGURE 2

Figure 3: Plan View and long section view of Chicken Mountain, highlighting the interpreted higher-grade corridors can be viewed at: CLICK HERE TO VIEW FIGURE 3

Figure 4: Cross Section Looking North of Jam Drilling Line, highlighting drill results and higher grade corridors can be viewed at: CLICK HERE TO VIEW FIGURE 4

Table 1. Significant Highlights Black Creek RC Drill Results* 

*All reported intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Select composites utilizing 0.10, 0.30 or 0.50 g/t Au cut-off with a maximum 3.2m continuous (two sample) below the cut-off inclusion.

Table 1. Significant Highlights Jam RC Drill Results* 

*All reported intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Select composites utilizing 0.10, 0.30 or 0.50 g/t Au cut-off with a maximum 3.2m continuous (two sample) below the cut-off inclusion.

Table 1. Significant Highlights Alpha Bowl RC Drill Results* 

*All reported intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Select composites utilizing 0.10, 0.30 or 0.50 g/t Au cut-off with a maximum 3.2m continuous (two sample) below the cut-off inclusion.

Table 1. Significant Highlights Golden Apex RC Drill Results* 

*All reported intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Select composites utilizing 0.10, 0.30 or 0.50 g/t Au cut-off with a maximum 3.2m continuous (two sample) below the cut-off inclusion.

Table 2. Significant Highlights Alpha Bowl Diamond Drill Core Assay Results*

*All reported intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Select composites utilizing 0.10, 0.30 or 0.50 g/t Au cut-off with a maximum 3.2m continuous below cut-off inclusion.

Table 2. Significant Highlights Golden Apex Diamond Drill Core Assay Results*

*All reported intercepts are reported as downhole lengths, as insufficient data exists to determine true widths. Select composites utilizing 0.10, 0.30 or 0.50 g/t Au cut-off with a maximum 3.2m continuous below cut-off inclusion.

Table 3. Drill Hole Details at Chicken Mountain

Footnotes and References:

1. Golden Horn Historic Production from ”Bundtzen et al 1992, Geology and Mineral Resources of Iditarod Mining District, Iditarod B4 and Eastern B-5 Quadrangles, Southwestern Alaska, DGGS Professional Report 97”

2. Placer production figures from “Mineral Occurrence and Development Potential Report, Locatable and Salable Minerals, Bering Sea-Western Interior Resource Management Plan, BLM-Alaska”

On behalf of Tectonic Metals Inc.,
Tony Reda
President and Chief Executive Officer

For further information about Tectonic Metals Inc. or this news release, please visit our website at www.tectonicmetals.com or contact Investor Relations, toll-free at 1.888.685.8558 or by email at investorrelations@tectonicmetals.com.