Great Atlantic Resources Plans Comprehensive 2026 Exploration Program at Elmtree Silver Mine & Keymet Silver Mine Incl. 2,500 Metres of Diamond Drilling - Northern New Brunswick

Rhea-AI Summary

Great Atlantic Resources (OTC: GRARF) plans a comprehensive 2026 exploration program at its 100% owned Keymet Project in northeast New Brunswick. The program targets the Elmtree and Keymet silver occurrences and Elmtree 12 vein system and includes 2,500 metres of diamond drilling, prospecting, geochemistry, geophysics and trenching.

Key facts: property ~3,340 hectares, ~20 km NW of Bathurst; permit applications for line-cutting, trenching and drilling were to be submitted in February 2026.

Positive

• Planned 2,500 metres of diamond drilling in 2026
• Property covers 3,340 hectares, ~20 km NW of Bathurst
• Historic production: 59,000 tons at 33.9 g/t Ag (1954–56)
• Multiple high-grade historical intercepts (e.g., 1,158 g/t Ag)

Negative

• 2026 field program is subject to permitting and approvals
• Most historic drill intercepts were shallower than 150 m; deeper continuity unproven

Vancouver, British Columbia--(Newsfile Corp. - February 25, 2026) - GREAT ATLANTIC RESOURCES CORP. (TSXV: GR) (the "Company" or "Great Atlantic") is pleased to announce plans for 2026 at its 100% owned Keymet Precious - Base Metal Project, located in northeast New Brunswick. The 2026 program will focus on the northwest region of the Keymet Property which hosts multiple polymetallic veins (silver, copper, zinc and lead bearing) including:

• Elmtree Silver Mine occurrence (late 19^th century workings)
• Keymet Silver Mine (mid 1950s commercial silver-lead-zinc-copper production)
• Elmtree 12 vein system (periodic Great Atlantic drilling during 2015-2021 intersected multiple high-grade silver, copper and / or zinc veins including 1,158 grams / tonne (g/t) silver, 9.18% copper and 9.04% zinc over 3.00 meters core length)

Ky-18-14 (1,158 g/t Ag, 9.19% Cu and 9.04% Zn over 3.00 meters core length)

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_002full.jpg

The Keymet Project consists of two mineral claims (claim nos. 4283 and 5643) covering a total area of approximately 3,340 hectares, located approximately 20 kilometers northwest of Bathurst.

Great Atlantic is currently planning an exploration program within the northwest region of the Keymet Property during 2026 consisting of prospecting, rock - soil geochemical sampling, geophysical surveys (induced polarization / resistivity and magnetic), multiple trenching and 2,500 metres diamond drilling. The work will be focused mainly within the region extending northwest from the past producing Keymet Silver Mine to the areas of the Elmtree Silver Mine occurrence and the Elmtree 12 occurrence. Great Atlantic is currently finalizing these plans and will submit permit applications for line-cutting, excavator trenching and diamond drilling to the New Brunswick government in February. The primary objectives of this work include:

• Test the extension of the polymetallic vein system northwest of the Keymet Silver Mine
• Test the Elmtree 12 polymetallic vein system along strike and deeper (testing the vein system deeper than 150 meters vertical depth - most drill intercepts to date above 150 meters vertical depth)
• Test for additional polymetallic veins in the area of the Elmtree Silver Mine occurrence
• Test areas of known gold mineralization in the area of the Elmtree 12 occurrence

Silver Occurrences - Keymet Property

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_003full.jpg

3D View of Keymet Silver Mine Shaft and Ore Body

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_004full.jpg

Past-Producing Keymet Silver Mine: The past-producing Keymet Silver Mine was developed on polymetallic veins and operated during the mid 1950s (New Brunswick Department of Natural Resources and Energy Development Mineral Occurrence Database, Reference No. 368). The New Brunswick Mineral Occurrence Database files report development to the 900-foot level (274 meters) and production during 1954-1956 of approximately 59,000 tons grading on average 33.9 g/t silver, 2.59% zinc, 2.44% lead and 0.25% copper. Operation ceased during 1956 following a surface fire.

Keymet Silver Mine (mid 1950s)

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_005full.jpg

Elmtree Silver Mine: Workings at the historic Elmtree Silver Mine are reported to date back to the late 1950 (also referred to as the Elmtree 13 mineral occurrence - New Brunswick Department of Natural Resources and Energy Development Mineral Occurrence Database, Reference No. 901). This includes a shaft reported to a depth of approximately 20 meters, reported to be developed on a vein with quartz, calcite and sulfides reported to be 1.8-2.4 metres wide. Reported assays at that time included an assay of 33.75 oz/ton silver. Great Atlantic completed three drill holes in this general area during 2015 and 2023 and located the historic shaft. A 0.51-meters long (core length) sample from hole Ky-15-01 returned 9.53% zinc, 9.01% lead and 66 g/t silver.

Elmtree 12 Vein System: Great Atlantic explored the area of the Elmtree 12 polymetallic vein system periodically during 2015-2021 (New Brunswick Department of Natural Resources and Energy Development Mineral Occurrence Database, Reference No. 951). This included geophysical surveys (electromagnetic) and trenching during 2015 and four diamond drilling programs during 2015-2021. The drilling included multiple significant silver, copper and zinc intercepts including (core length) (see Great Atlantic's website for New Releases):

• Ky-18-14: 3.00m at 1,158 g/t Ag, 9.04% Zn, 9.19% Cu and 2.16% Pb
• Ky-17-8: 1.27m at 576 g/t Ag, 18.80% Zn, 3.55% Cu and 1.16% Pb
• Ky-18-16: 0.52m at 478 g/t Ag, 4.47% Zn and 7.85% Cu
• Ky-18-10: 1.00m at 223 g/t Ag, 16.80% Zn and 1.60% Cu
• Ky-17-6: 4.95m at 209 g/t Ag, 7.67% Zn and 1.57% Cu
• Ky-17-5: 0.80m at 166 g/t Ag, 13.65% Zn and 1.20% Cu
• Ky-18-12: 1.20m at 157 g/t Ag, 8.90% Zn and 3.81% Cu
• Ky-15-3: 1.80m at 152 g/t Ag, 16.68% Zn and 1.11% Cu

2015-2018 Drill Hole Plan Map - Elmtree 12 Occurrence Area

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_006full.jpg

The 2015 trenching program at the Elmtree 12 vein system exposed glacial float and veins in bedrock with high grade silver as well as significant copper and zinc mineralization. A 0.5-meters long channel sample within one trench returned 308 g/t silver, 1.94% copper and 1.52% zinc. A sample from a piece of glacial float in the same trench returned 472 g/t silver, 7.6% zinc and 5.1% copper.

Additional Silver-Bearing Occurrences: Five additional mineral occurrences with reported silver are reported within the northern region of the Keymet Project. These include (with reference numbers as per the New Brunswick Department of Natural Resources and Energy Development Mineral Occurrence Database) Elmtree 2 (114), Elmtree 6 (110), Elmtree 14 (834), Keymet 3 (921) and Madran Northeast (1513). At the Elmtree 2 occurrence a 1965 drill hole was reported to intersect 2.0 oz. / ton silver, 5.86% zinc and 3.38% lead over 0.3 meters core length (New Brunswick Department of Natural Resources and Energy Development, Mineral Report of Work No. 470461). This occurrence is reported within the northwest region of the Keymet Project, northwest of the Keymet Silver Mine. At the Elmtree 6 occurrence a 1960 grab sample was reported to return 4.52 oz. / ton silver, 7.41% zinc and 5.85% lead (New Brunswick Department of Natural Resources and Energy Development, Mineral Report of Work No. 470052, Wark, 1964). Great Atlantic is planning focused prospecting and rock sampling +/- soil geochemical sampling and +/- geophysical surveys during 2026 to locate these additional occurrences.

Keymet Property Map

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_007full.jpg

David Martin, P.Geo., (New Brunswick and Newfoundland and Labrador), a Qualified Person as defined by NI 43-101 and VP Exploration for Great Atlantic, approved the technical information contained in this News Release.

On Behalf of the board of directors

"Christopher R. Anderson"
Mr. Christopher R. Anderson
President CEO Director
604-488-3900

Investor Relations:
1-416-628-1560
IR@GreatAtlanticResources.com

___

Never miss an update!

Follow Great Atlantic Resources Corp. on social media for project updates, photos, and much more.

LINKEDIN: https://ca.linkedin.com/company/greatatlanticresources
X: https://x.com/GreatAtlRes
FACEBOOK: https://www.facebook.com/GreatAtlanticResources
INSTAGRAM: https://www.instagram.com/greatatlanticresources/
YOUTUBE: https://www.youtube.com/@GreatAtlanticTV/
TIKTOK: https://www.tiktok.com/@greatatlanticresources

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_008full.jpg

About Great Atlantic Resources Corp.: Great Atlantic Resources Corp. is a Canadian exploration company focused on the discovery and development of mineral assets in the resource-rich and sovereign risk-free realm of Atlantic Canada, one of the number one mining regions of the world. Great Atlantic is currently surging forward building the company utilizing a Project Generation model, with a special focus on the most critical elements on the planet that are prominent in Atlantic Canada, Gold, Copper, Zinc, Nickel, Cobalt, Antimony and Tungsten.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/3027/285187_a10a1017b4a649e8_009full.jpg

This press release includes certain statements that may be deemed "forward-looking statements". All statements in this release, other than statements of historical facts, that address future exploration drilling, exploration activities and events or developments that the Company expects, are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those in forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements include exploitation and exploration successes, continued availability of financing, and general economic, market or business conditions.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Great Atlantic Resource Corp.
888 Dunsmuir Street - Suite 888, Vancouver, B.C., V6C 3K4

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/285187

FAQ

What exploration work will Great Atlantic (GRARF) do at Keymet in 2026?

The company will run prospecting, geochemistry, geophysics, trenching and 2,500 metres of diamond drilling. According to the company, work focuses on the Keymet Silver Mine corridor, Elmtree occurrences and the Elmtree 12 vein system to test extensions and depth.

When will Great Atlantic (GRARF) start drilling at Keymet and are permits filed?

Permit applications for line-cutting, trenching and drilling were to be submitted in February 2026. According to the company, field timing depends on permit approvals and logistics before mobilizing drill crews.

How large is the Keymet property controlled by Great Atlantic (GRARF)?

The Keymet Project covers approximately 3,340 hectares, located about 20 kilometres northwest of Bathurst. According to the company, the area includes multiple historic silver–base metal occurrences and past workings.

What notable historical grades exist near Great Atlantic's (GRARF) Keymet targets?

Historic production reported ~59,000 tons averaging 33.9 g/t silver and base metals (1954–56). According to the company, past drill intercepts include very high grades such as 1,158 g/t Ag over 3.00 metres.

What are Great Atlantic's (GRARF) primary 2026 drill objectives at Elmtree 12?

Main objectives are to test strike extensions and go deeper than 150 metres vertical where most prior intercepts were shallower. According to the company, deeper drilling aims to evaluate continuity of high-grade veins.

Will Great Atlantic (GRARF) explore other silver occurrences on Keymet in 2026?

Yes, the company plans targeted prospecting and sampling to locate five additional documented silver occurrences. According to the company, work may include soil sampling and geophysics to refine drill targets.