PRESS RELEASE: GREAT DIVIDE MINING MOVES PROMPTLY TO EXPAND CHALLENGER

Latest Press Release

Great Divide Mining Ltd (ASX:GDM) advises that continuous gold recovery equipment has begun to arrive at the Challenger Gold Mine, less than 30 days after the successful first gold pour.

Spiral Separators are part of a planned upgrade to Challenger’s batch-only processing. A continuous, gravity-based concentrator, the spiral separators extract gold-rich concentrates using centrifugal force and recycled water running down along a spiral trough. No chemicals are used.

“The Challenger processing plant hadn’t operated in 8 years. GDM got it up and operating, and achieved first gold pour, in just 4 months,” said GDM CEO Justin Haines.

“As part of GDM’s “crawl-walk-run” business approach, we completed the “crawl” using the existing, low capacity, batch-style equipment, as currently installed at the site,” said Haines.

“As we recommissioned and tested equipment, we identified opportunities to immediately improve performance. So, in parallel, GDM commenced a national search to identify equipment to upgrade the Challenger site to continuous processing,” he said.

“With continuous processing, Challenger becomes a more secure, long-term commercial operation. The cash surplus expected to be generated at this scale will support further expansion and modernisation of the Challenger mine itself, and accelerate development of GDM’s 4 other advanced projects, further preserving and enhancing shareholder value,” says Haines.

“We’ve achieved first pour, ahead of schedule and ahead of budget. So, tick that box. Next goal … continuous operations at around 24 tonnes per hour.” smiles Haines.

–ENDS–

Media Contacts:

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

Attachments:

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August 11, 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. Challenger Gold Mine Pty Ltd, Adelong, NSW Located less than 100km from Canberra, the historic Adelong goldfields have produced over 26 tonnes of gold since discovery in 1857. Major gold reefs in the district include Challenger, Donkey Hill, Caledonian, Sawpit Gully, and Victoria Hill. Challenger Gold Mine P/L holds exploration and mining licences across this proven district, including ML1435 and EL5728. The Company’s recommissioned Challenger processing plant will be supplied from both open-cut and underground operations, with further expansion potential across multiple reefs. GDM is now working to grow production beyond 25,000 oz pa while unlocking additional value through ongoing regional exploration. https://greatdividemining.com.au/projects/challenger-gold/

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