Dart Mining Unveils High-Grade Antimony and Gold at Coonambula JV

Strong Start at Historic Banshee Mine

Dart Mining NL, the joint venture partner of Great Divide Mining Ltd (ASX, GDM), has delivered promising early results from its inaugural drilling campaign at the Coonambula Antimony-Gold Project in Central Queensland. The first diamond drill hole at the historic Banshee mine intersected multiple zones of high-grade antimony and gold mineralisation, including a standout 5-metre interval grading 4.33% antimony and 1.69 grams per tonne (g/t) gold.

Within this broader zone, narrower but exceptionally rich veins were identified, such as a 0.65-metre section boasting 32.2% antimony and 2.91 g/t gold, and another 0.7-metre interval with 5.61 g/t gold and 154 g/t silver. These results not only confirm the presence of massive stibnite veins but also highlight the potential for a valuable polymetallic system.

Validating the Joint Venture Strategy

Great Divide Mining’s Managing Director, Justin Haines, expressed confidence that these assay results validate the company’s exploration model and the timing of the farm-in agreement with Dart Mining. Under the joint venture terms, Dart Mining can earn up to a 51% interest in the project by completing defined drilling and reporting milestones over two years. Having already secured an initial 15% stake, Dart is actively drilling to infill known high-grade zones and advance toward a JORC-compliant resource estimate.

Dart Mining’s Chairman, James Chirnside, emphasised the significance of the results, noting that every hole drilled so far has returned the highest antimony and silver assays in the project’s history. The company plans to continue drilling along the Banshee trend, aiming to delineate the extent and grade of mineralisation and refine its 3D geological model.

Strategic Location and Historical Context

The Coonambula project is strategically situated approximately 70 kilometres southeast of Evolution Mining’s Cracow gold mine and 25 kilometres southwest of Eidsvold, within a region known for its rich mineral endowment. The Banshee mine itself has a storied history, having produced antimony intermittently from the late 19th century through to the 1980s. Historical drilling and trenching have revealed multiple high-grade antimony and gold intersections, underscoring the prospectivity of the area.

Additional nearby prospects such as the Lady Mary site, located just one kilometre east of Banshee, have also returned encouraging surface samples with antimony grades up to nearly 50%. The combined strike length of the prospective mineralised zone is approximately five kilometres, with much of it still underexplored.

Next Steps and Market Implications

Dart Mining is planning a 2,000-metre diamond drilling program to build on these initial results, with further assay returns expected in the coming months. The company aims to refine its drill plan based on geophysical surveys and develop a JORC-compliant resource estimate. For Great Divide Mining, these developments represent a critical step toward unlocking value from its Coonambula tenements and advancing the project toward potential production.

While the results are encouraging, investors should note that the resource remains at an early stage of definition, and further drilling is required to confirm the continuity and economic viability of the mineralisation. Nonetheless, the high-grade assays provide a compelling rationale for continued investment and exploration activity in this historically significant mining district.