Large-Scale Geophysical Targets Confirmed at the Storm Project, Nunavut, Canada

10 September 2025

Final MMT survey results identify pipeline of high-priority copper exploration targets
 
Highlights:

  • Multiple large copper targets confirmed with geophysics. The final results and 3D inversion for the airborne Mobile MagnetoTellurics (“MMT”) survey along the Midway-Storm-Tornado corridor have been received, and highlights include;
    • A large conductive anomaly with a strike of more than 16km located to the north of the Cyclone Deposit and at approximately 200 metres (“m”) average depth – this feature is interpreted to be contained within the Allen Bay Formation, previously confirmed by drilling at Storm to be the main host of copper sulphide mineralization in the project area
    • A large, stratiform conductive anomaly also to the north of the Cyclone Deposit at an interpreted 400m average depth is interpreted to represent the deeper copper horizon at Storm, where deep diamond drilling has already discovered copper sulphides across an area spanning 10 sq km
    • Two additional, discordant conductive trends have been confirmed at approximately 400m depth in the Midway and Tornado/Blizzard areas, with the potential to host copper mineralization, supported by mapping and sampling in the area, which has identified outcropping copper sulphides
       
  • Validation of geophysics results. The large, shallow, and flat-lying Cyclone Deposit has a distinct response in the new MMT survey data, confirming the effectiveness of this geophysical technique to detect copper sulphide mineralization at the Storm Project, and giving more weight to the potential of the new targets to potentially represent additional copper mineralization.
     
  • Mine permitting progresses: Engagement with the Nunavut Planning Commission (NPC) continues regarding key permitting applications, including the ‘proposed mine development and early-works permit’ to facilitate pre-development works for the potential mining operation.
     
  • Pre-Economic Analysis (“PEA”) and Pre-Feasibility Study (“PFS”) advances: Workstreams for completion of the PEA and PFS continue with final reports on field activities being compiled and financial modelling for a potential mining operation being optimized.

 
TORONTO, Ontario, September 10, 2025 – Aston Bay Holdings Ltd. (TSXV: BAY) (OTCQB: ATBHF) ("Aston Bay" or the "Company") is pleased to provide the final MMT geophysical survey results conducted at the Storm Copper Project ("Storm" or the "Project") on Somerset Island, Nunavut. American West Metals Limited ("American West"), the Project operator, is conducting the exploration program. Aston Bay and American West have formed a 20/80 unincorporated joint venture with respect to the Storm Project property, with Aston Bay maintaining a free carried interest until a decision to mine is made upon completion of a bankable feasibility study.

Thomas Ullrich, Chief Executive Officer of Aston Bay, commented:
"We are excited to report these new conductive anomalies from this season’s MMT geophysical survey at Storm. The anomalies are large and hosted within favourable stratigraphic and structural horizons, fitting well with our geologic model. The conductivity of the anomalies is similar to that of the high-grade zones within the Cyclone Deposit, suggesting that these new anomalies may be associated with copper sulphide mineralization."

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