Great Atlantic Advances 2026 Plans for Its Keymet High-Grade Silver District: Two Historic Silver Mines, Including the Keymet Silver Mine (Closed Due to Fire), 1,100 g/t Silver Over 3 Meters Recently Drilled by Great Atlantic - Northern New Brunswick

Vancouver, British Columbia--(Newsfile Corp. - December 10, 2025) - GREAT ATLANTIC RESOURCES CORP. (TSXV: GR) (the "Company" or "Great Atlantic") is pleased to announce it has completed a compilation of reported exploration results for silver at its 100% owned Keymet Precious – Base Metal Project, located in northeast New Brunswick.

HIGHLIGHTS OF THIS COMPILATION INCLUDE:

• 19th-century workings at the Elmtree Silver Mine occurrence (circa 1880-1897);
• Commercial silver-lead-zinc-copper production from the Keymet Mine (mid 1950s); and
• Multiple high-grade silver intercepts from Great Atlantic 2015-2021 diamond drilling, including up to 1,158 grams / tonne (g/t) silver.

Vein with semi-massive sulfides - Ky-18-14 (1,158 g/t Ag over 3.00 meters core length)

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The Keymet Project consists of two mineral claims covering a total area of approximately 3,340 hectares, located approximately 20 kilometers northwest of Bathurst.

The compilation has identified multiple reported silver bearing veins / vein systems within the northern region of the project, including at the historic Keymet Mine and Elmtree Silver Mine occurrence and other polymetallic veins / vein systems (New Brunswick Department of Natural Resources and Energy Development, Mineral Occurrence Database). Collectively, the information demonstrates that Keymet is one of the most historically significant silver-bearing vein systems in Atlantic Canada, with multiple silver bearing vein structures being targets for exploration.

"Our renewed focus on the silver potential at Keymet is revealing a rich and layered mining history dating back nearly 150 years. Few projects in Atlantic Canada can show both 19th-century silver workings and 1950s commercial production, combined with modern high-grade drill results exceeding one kilogram per tonne silver," states Mr. Anderson, CEO.

"The same mineralized structures exploited in the 1800s and 1950s remain vastly underexplored. The compilation demonstrates the strong geological continuity and the potential for additional high-grade silver veins. This places Great Atlantic in a unique discovery position in Eastern Canada."

Keymet Property Map

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