Dart Mining Strikes High-Grade Antimony at Coonambula Drilling Start

Exploration Momentum Builds at Coonambula

Dart Mining NL (ASX, DTM) has commenced diamond drilling at the Coonambula Antimony-Gold Project in Central Queensland, marking a significant step forward in its farm-in joint venture with Great Divide Mining (ASX, GDM). The project, covering six tenements, is strategically located near established goldfields and historic antimony mines, offering promising geological potential.

The first drill hole, CBADD001, intersected a visually impressive 0.6 metres of massive sulphide mineralisation estimated to be approximately 70% stibnite at a depth of 42 metres, with a second zone of stibnite veining encountered at 70 metres. While these visual estimates are encouraging, assay results expected in early November will provide the definitive measure of grade and economic viability.

Government-Backed Geophysical Survey Enhances Targeting

Complementing the drilling program, Dart Mining has initiated an Induced Polarisation (IP) survey funded through the Queensland Government's Collaborative Exploration Initiative (CEI). This survey aims to identify additional high-grade antimony shoots along the Banshee prospect and adjacent structures, potentially expanding the scope of mineralisation beyond known zones.

The IP survey covers 15 lines spaced 100 metres apart, extending over 1.4 kilometres of strike length. Early progress has been described as excellent, with data quality and interpretation managed by specialist geophysical firms. The survey results are expected to refine and generate new drill targets for follow-up in 2026.

Strategic Drilling Plans and Project Outlook

Dart Mining plans to complete an initial 2,000 metres of drilling before the end of 2025, focusing on infill and extension drilling at the historic Banshee antimony prospect. Further drilling in 2026 will test additional targets identified by the IP survey and support the potential definition of a JORC-compliant mineral resource statement.

The farm-in agreement allows Dart Mining to earn up to a 51% interest in the project, contingent on meeting exploration milestones. Historical drilling and trenching by Great Divide Mining have returned notable antimony and gold grades, reinforcing the project's prospectivity. Dart’s in-house drilling rig and experienced exploration team are positioned to efficiently advance the program.

Broader Exploration Context and Future Potential

The Coonambula project lies within a geologically prospective region characterized by intrusion-related gold and antimony mineralisation styles. Nearby historic mines and recent rock chip samples with high antimony grades underscore the potential for significant discoveries. Dart Mining’s broader strategy includes expanding its footprint in Queensland and Victoria, targeting precious and strategic metals.

As the drilling progresses and assay results emerge, market participants will be watching closely for confirmation of the high-grade mineralisation and the implications for resource development. The combination of government-supported geophysics and active drilling positions Dart Mining well to unlock value in this underexplored region.