Eskay Expands High-Grade Vein-Hosted Gold-Silver Mineralization at its 100% Controlled and Consolidated Eskay Project in the Golden Triangle

TORONTO, ON / ACCESS Newswire / September 17, 2025 / Eskay Mining Corp. ("Eskay" or the "Company") (TSXV:ESK)(OTC PINK:ESKYF)(Frankfurt:KN7)(WKN: A0YDPM) is pleased to provide initial assay results from its prospecting and sampling program at its 100%-controlled Consolidated Eskay Project in the Golden Triangle, British Columbia. The Company's geological team, through systematic prospecting and sampling, has significantly expanded the area where high-grade gold veins were discovered in 2024. Samples from areas including Vermillion, TM, Red Lightning, and Big Red, zones surrounding Unuk Finger Mountain in the southern extent of the Property, have all yielded numerous high-grade assays.

2025 Select Highlights

• 10 rock samples assayed over 20 g/t Au, 20 samples assayed over 10 g/t Au, 37 samples assayed over 5 g/t Au, and 68 samples assayed over 1 g/t Au out of a total of 298 surface rock samples

• Select individual high-grade spot rock chip results include:

  • 246 g/t Au, 22.8 g/t Ag, and 0.25% Cu

  • 150 g/t Au, 76 g/t Ag, and 1.57% Cu

  • 86.2 g/t Au, 180 g/t Ag, and 2.63% Cu

  • 71.4 g/t Au, 15.8 g/t Ag, and 0.66% Cu

  • 33.7 g/t Au, 257 g/t Ag, and 2.7% Cu

  • 28.8 g/t Au, 363 g/t Ag, and 0.49% Cu

• Also noteworthy, a 21.8 g/t Au, 19.9 g/t Ag, and 0.69% Cu channel sample over 1.00m was cut at Vermillion

"Eskay's geological team did a superb job following up on last year's exciting discovery of high-grade gold-silver veins in the southern reaches of our 100%-controlled Consolidated Eskay Project this season," commented Quinton Hennigh, Director and Technical Advisor to Eskay Mining. "With these initial assays, we can now see that there is a wide distribution of veins, some displaying very high grades of gold and silver, across an area at least 2 km wide. This system is demonstrating it has capacity to make high-grade over a large expanse, and our BLEG stream sediment data indicates we have lots more room to grow. I think, given the large magnitude of the BLEG results here coupled with these very strong surface results, we are defining a new high-grade gold-silver vein system akin to those seen at Goliath Resources and Juggernaut Resources, also in the GT."

2025 Exploration Program

The 2025 exploration program at the Eskay Project includes extensive surficial sampling, reconnaissance geological mapping, and channel sampling across target areas around the Unuk Finger Mountain with the goal of advancing early-stage prospects into drill ready targets. A total of 298 rock sample and 29 channel sample assays have been received to date with further sampling ongoing on the Vermillion, TM and Big Red zones. In addition, a Worldview 3 high-resolution satellite imagery survey has been collected across the property with results expected later this month. Hyperspectral imaging and detailed orthophotos will help support focused exploration efforts across Eskay's 200 km² project area.

Target areas around Unuk Finger mountain in the southeast portion of the Eskay claim block were first explored in the late 1980's but the area has seen limited exploration activities in recent years. Between 2020 and 2022, a bulk leach extractable gold (BLEG) stream sediment sampling program was conducted across large portions of the Eskay Project which identified numerous anomalous gold zones with particularly strong anomalies occurring in watersheds around the Unuk Finger mountain (Figure 1). Initial follow-up work in 2024 around BLEG anomalies successfully identified vein-hosted gold and silver mineralization at the Vermillion and TM zones and follow-up in these areas has been the primary focus of exploration efforts in 2025. Exploration conducted across these target areas has identified significant vein-hosted gold and silver mineralization spanning over two kilometres on surface with visible gold observed in multiple quartz-sulphide veins (Figure 2).

Figure 1. Gold values for 2020-2022 BLEG sampling programs at the southeast area of the Eskay Project with 2025 rock sample gold assays.

Figure 2. 2025 sample map location of target zones around Unuk Finger with gold assay results.

Results from the Vermillion, TM and Red Lightning Zones

Exploration conducted across the Vermillion, TM and Red Lightning targets has identified significant vein-hosted gold and silver mineralization that share many characteristics with reduced intrusion-related gold systems (RIRGS). Prospecting and reconnaissance mapping have discovered flat lying, sheeted and planar shear quartz vein zones spanning over 600 metres vertically and 500 by 2000 metres laterally with further areas to assess moving forward (Figure 3). Veining is spatially related to a biotite-hornblende quartz monzonite intrusion of the Lee Brant intrusive stock believed to be of Eocene age which covers a 40 sq/km area south of the vein zones.

In-situ visible gold and electrum mineralization have been identified over a 2km strike length occurring in multiple planar and sheeted quartz-carbonate veins at both the Vermillion and TM zone to the east. Veins hosting accessory pyrrhotite, chalcopyrite, bismuthinite, and rarely wolframite and gold show strong correlations with copper, bismuth and silver with anomalous tellurium. Lead and zinc (+/- silver) veins have also been sampled and may represent distal expressions of the mineralizing system. Mineralized veins are primarily hosted in metavolcanic and volcaniclastic sequences of the Lower to Middle Jurassic Hazelton Group and have also been observed in float boulders of the Lee Brant Stock quartz monzonite.

Figure 3. 2025 rock sample assays for gold from Vermillion, TM, and Red Lightning zones.

A total of 209 rock sample assays has been received from the Vermillion, TM, and Red Lightning zones to date with additional samples pending assay results.

Assay Highlights from TM Zone

• 7 spot rock chip samples assayed > 10 g/t Au, 11 samples assayed > 5 g/t Au, and 21 samples assayed > 1 g/t Au

• Spot rock chip sample A0519908 assayed 246 g/t Au, 22.8 g/t Ag, and 0.25% Cu

• Spot rock chip sample A0513144 assayed 150 g/t Au, 76 g/t Ag, and 1.57% Cu

• Spot rock chip sample A0519907 assayed 86.2 g/t Au, 180 g/t Ag, and 2.63% Cu

Assay Highlights from Vermillion and Red Lightning Zones

• 10 spot rock chip samples assayed > 10 g/t Au, 23 samples assayed > 5 g/t Au, and 43 samples assayed > 1 g/t Au

• Spot rock chip sample A0513397 assayed 71.4 g/t Au, 15.8 g/t Ag, and 0.66% Cu

• Spot rock chip sample A0514206 assayed 33.7 g/t Au, 257 g/t Ag, and 2.7% Cu

• Spot rock chip sample A0514399 assayed 28.8 g/t Au, 363 g/t Ag, and 0.49% Cu

Table 1. Select assay highlights from TM zone rock samples.

Table 2. Select assay highlights from Vermillion zone rock samples.