Great Divide Mining Ltd (ASX:GDM) Coonambula Drilling Continues to Deliver High-Grade Gold, Silver and Antimony Results

19 February 2026

Price Sensitive Announcement $

Highlights:

• Record high gold, silver and antimony grades returned from Banshee prospect:

  o CBADD010 delivered highest gold assay: 0.2m @ 20.20 g/t from 37.7m
  o CBADD004 produced record silver result: 0.6m @ 234 g/t from 57.95m
  o CBADD010 produced record antimony result: 0.6m @ 44.6% Sb from 37.9 m

• Multiple broader zones show strong Au-Ag-Sb mineralisation continuity
• Mineralisation remains open along strike and at depth, supporting resource growth.
• Dart Mining has completed 2594 metres of diamond drilling at Banshee to date

Overview:

Great Divide Mining Limited (ASX: GDM) an Australian gold, copper, antimony and critical metals miner, explorer and producer, has provided an update on the 4,000m drilling programme being undertaken by its Farm-In Joint Venture partner, Dart Mining NL (ASX: DTM)(“Dart”). The drilling programme is being undertaken at the former Banshee Antimony Mine within the Coonambula Antimony–Gold Project in Central Queensland

The second round of results from the initial drilling program is continuing at the historic Banshee Antimony Mine infilling existing high-grade intersections and advancing toward a JORC-compliant Antimony-Gold Resource. Further drilling results are expected in the coming months.

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.

Coonambula is located approximately 70 km southeast of Evolution Mining’s Cracow gold mine and 25 km southwest of Eidsvold. The Project is currently held 100 % by GDM subsidiaries GDM Coonambula Pty Ltd and GDM Yellow Jack Pty Ltd.

Company Notes:

Chief Executive Officer, Justin Haines commented:
“The continued excellent results underscore the emerging scale and quality of the Banshee system. These record high gold, silver and antimony grades at Banshee continue to confirm what we have long believed Coonambula has the geological architecture to host a commercially significant antimony-gold system.”

Full ASX Announcement: Great Divide Mining ASX Announcement