GDM Hits the “GO” Button – at Challenger

Author: Great Divide Mining

Category:

Date: May 28, 2026

Great Divide Mining Ltd (ASX: GDM) has officially commenced commercial operations at its Challenger Gold Mine in Adelong, NSW, marking a major milestone in the site’s rapid return to production.

Following a successful commissioning program, supported by analytical laboratory testing of processed ore, the Company has now transitioned into steady-state operations. Processing of historic tailings is underway, with early results confirming strong system performance and consistency.

Based on commissioning outcomes, GDM is confident in the operation’s ability to produce gold concentrate targeting grades of approximately 30 grams per tonne.

The first shipment of gold concentrate is now being prepared, with the inaugural truckload scheduled to depart the site in the coming days to an established international refining partner.

GDM CEO Justin Haines said the milestone reflects the Company’s commitment to delivering on its promises to both the local community and investors.

“At GDM’s recent Community Information Evening and Community Open Days we promised to deliver an operating gold mine at Challenger. We’ve now delivered for the community and all shareholders and investors.”

Mr Haines said Challenger is a clear example of GDM’s strategy in action.

“Challenger demonstrates the strength of GDM’s approach — bringing brownfield assets back into commercial production in a disciplined and capital-efficient way. By working with existing infrastructure and historic tailings, we’re able to reduce risk for investors while also minimising environmental impact.”

The recommissioning of Challenger has been achieved within a condensed timeframe and without the need for large-scale new mining activity, highlighting the benefits of GDM’s staged “crawl, walk, run” development model.

GDM’s focus now shifts to ramping up production and establishing regular shipments of gold concentrate, as the Company continues to build momentum across its broader portfolio of projects.

“GDM Wins the Challenger Challenge! ” smiles Haines.

Commercial production commenced at GDM’s Challenger Gold Mine
Commercial production commenced at GDM’s Challenger Gold Mine
For further information:

Justin Haines, CEO
e justin.haines@greatdividemining.com.au
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, developer and producer 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.

https://greatdividemining.com.au/

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Author: Great Divide Mining

Category:

Date: May 28, 2026

Great Divide Mining Ltd

Level 12, 127 Creek Street Brisbane QLD 4000

ABN: 47 655 868 803

Phone Number: 07 3071 9290

Email: admin@greatdividemining.com.au

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