PRESS RELEASE: Every Drill Hole Hits Antimony at GDM’s Coonambula Project

Latest Press Release

Great Divide Mining (ASX:GDM) has welcomed a further round of strong visual drilling results from its’ farm-in partner Dart Mining NL (ASX:DTM), with every diamond hole at the Coonambula Antimony–Gold Project intersecting visible stibnite across the Banshee Prospect.

“Dart has now completed over 1,350 metres of drilling, confirming a continuous 300-metre mineralised strike that remains open both along trend and at depth,” said GDM’s CEO Justin Haines.

“Importantly, multiple intervals of solid to massive stibnite continue to reinforce the scale and persistence of the system,” he went on.

Recent visual results include:
• 0.5m of solid stibnite within a 2.2m mineralised interval in CBADD010.
• 1.1m of quartz-veined stibnite, including two solid veins, in CBADD006.
• 7.4m sulphide zone with massive stibnite logged in CBADD004.
• Massive stibnite zones in CBADD005/005a and CBADD007.

“The consistency of the drilling results highlights the growing scale of the Banshee system,” said Haines.

“Antimony is a globally recognised critical mineral, and Coonambula just keeps delivering. When every drill hole hits stibnite — and several contain massive zones — you know you’re working on a system with real scale,” he said.

Core processing and sampling at the site are now well progressed, with Dart preparing material for laboratory analysis. Drilling is continuing to tighten structural interpretation, define thickness, and extend the broader Sb–Au system across the Banshee trend.

“Dart’s field team continues to impress making rapid, smart progress, and we’re increasingly confident about the potential for a future resource,” said Haines, “confirming GDM’s brown-field strategy.”

ENDS

Media Contacts:

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

Attachments:

GDM-MR-Cnmbla-Drllng-251205-FA.pdf

December 5, 2025/by Reland Pigte

About Great Divide Mining

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

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