PRESS RELEASE: GDM confirms High-Grade Antimony and Gold at Coonambula

Latest Press Release

Great Divide Mining Ltd (ASX: GDM) reported today that its Joint Venture partner Dart Mining NL (ASX: DTM) has announced the first high-grade antimony and gold drilling results from its’ Coonambula Project in Central Queensland.

The results come from the very first drill hole at the historic Banshee Mine, part of GDM’s six-tenement Coonambula Project.

Early assays have confirmed high-value antimony and gold grades, confirming GDM’s ‘brown-field’ strategy of focusing on historically proven mineral fields.

Stibnite – Antimony – grades of 32.2% have been reported together with Gold at up to 23.65 gm/ton and Silver as high as 154 gm/ton.

Drilling continues to now define a JORC-compliant resource over coming months.

“These results confirm GDM’s commercial brown-field strategy and positively demonstrate the quality of both the project and of GDM’s JV partnership with Dart,” said Chief Executive Officer, Justin Haines.

“These first drilling results confirm the potential for a high-value antimony-gold system at the historic Banshee Mine and give us great confidence to accelerate the program along the broader Banshee trend,” said Haines.

Coonambula lies approximately 70 km southeast of Evolution Mining’s Cracow Mine and 25 km southwest of Eidsvold, positioning it in a well-understood, infrastructure-ready district.

“Check out the detailed ASX announcements released today by both Dart & GDM,” said Haines.

ENDS

Media Contacts:

Name: John KochanskiCompany: Great Divide MiningEmail: [email protected]Phone: 0411831122

Attachments:

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November 10, 2025/by Reland Pigte

About Great Divide Mining

For further information: Justin Haines, CEO e [email protected] m +61 (0)418 876 420 Great Divide Mining Ltd (ASX: GDM) Great Divide Mining is an Australian Gold, Antimony and critical metals miner, explorer and developer with five projects across 17 tenements (including two in application). GDM’s focus is on operating producing assets within areas of historical mining and past exploration with nearby infrastructure, thus enabling rapid development. Through a staged exploration and development programme, GDM intends to generate cash flow from its initial projects to support further exploration across its portfolio of highly prospective tenements. About the DTM – GDM Joint Venture Under the Joint Venture Agreement with GDM, Dart Mining may earn up to a 51 % interest in the Coonambula Project, across its’ six tenements, by completing defined drilling and reporting milestones over a two-year period. Dart has acquired an initial 15 % interest having paid an amount of $250,000 to GDM and now has obligations to complete at least 4,000 m of drilling and deliver two geological/resource reports to reach the 51 % ownership. Dart has been appointed Manager of the JV during the earn-in, whilst GDM retains the tenement ownership and a carried interest through the early exploration phases. The Project is currently held 100 % by GDM subsidiaries GDM Coonambula Pty Ltd and GDM Yellow Jack Pty Ltd.

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