PRESS RELEASE: Geophysics Point to Expanded Antimony-Gold Potential at Coonambula

Great Divide Mining Ltd (ASX: GDM) today reported encouraging results from new survey work underway at the Coonambula Antimony-Gold Project in Central Queensland, operated under joint venture with Dart Mining NL (ASX: DTM).

The findings suggest the main mineralised zone extends beyond previous drilling and may continue further east and north of the historic Banshee Mine area. The data also indicate a likely fault offset that could open up a new extension of the system.

The current geophysical survey was made possible through a Queensland Government Collaborative Exploration Initiative (CEI) Grant of $181,577 (including GST), awarded to GDM in June 2025 to support advanced exploration for critical minerals across the State.

“It’s early days, but the signs are positive,” said GDM CEO Justin Haines, ”Coonambula is showing strong potential for commercial scale, and we’re seeing consistent indications of high-grade antimony and gold in a region that’s long been known for both.”

“Dart’s work on site is progressing well, and while they continue with the next survey lines, we’re already seeing clear targets for targeted follow-up drilling,” said Haines.

“The IP survey covers about 1.4 kilometres of strike length, with most of the planned lines now complete and final interpretation expected in November,” he went on.

“Once the remaining data are received, results will be combined with previous drilling and sampling to guide the next round of exploration,” said CEO Haines.

Earlier work at Coonambula has recorded Antimony grades up to 65%, and Gold assays as high as 17 grams per tonne, confirming the area’s potential as a significant antimony-gold system in Queensland’s New England Fold Belt.

“Antimony is a critical mineral, with growing demand. Our joint venture with Dart Mining gives GDM access to that market, alongside our other gold and critical metal projects across Queensland and New South Wales,” Haines added.

“These early results confirm GDM’s brown-field strategy,” he said.

ENDS