How Antares Metals’ New 9km Copper Discovery Could Transform Mt Isa North
Antares Metals has extended copper mineralisation at its Mt Isa North Project and unveiled a major new copper discovery, alongside advancing high-grade uranium targets.
- 200m extension confirmed at Surprise Copper Project
- District-scale Cromwell Copper Prospect discovered with assays up to 22.5% Cu
- High-grade copper results at multiple prospects including Startle and Moonside
- Uranium exploration pipeline advanced with surface grades up to 1,988 ppm U3O8
- Strong cash position of approximately $0.8 million supports ongoing exploration
Exploration Momentum at Mt Isa North
Antares Metals Limited (ASX, AM5) has reported a productive quarter ending 30 September 2025, marked by significant progress at its Mt Isa North Copper-Uranium Project in Queensland. The company confirmed a 200-metre extension to the known mineralisation at the Surprise Copper Project through Phase 2 drilling, alongside validating the new Marvel discovery located 1.2 kilometres north of Surprise. These results reinforce the project's potential to host substantial copper resources.
Systematic field reconnaissance across the project area yielded widespread high-grade copper assays, with rock chip samples reaching up to 22.3% copper at the Startle prospect and 16.2% copper at Moonside. The discovery of a previously unrecognised, district-scale copper mineralisation zone at the Cromwell Prospect post-quarter further elevates the project's profile. This zone extends over a 9-kilometre strike length with rock samples grading as high as 22.5% copper, suggesting a large mineralised system that remains open for expansion.
Advancing Uranium Targets
Parallel to copper exploration, Antares has advanced its uranium pipeline with promising surface results. High-grade uranium assays include 1,988 ppm U3O8 at Monte Bello and 1,786 ppm U3O8 at the B8A prospect. The company’s systematic ground-truthing and sampling have identified multiple high-priority uranium targets, including Skevi and U4A, which exhibit significant uranium and thorium values. These findings position Antares well to capitalise on the growing interest in uranium as a strategic resource.
Strategic Implications and Outlook
CEO Johan Lambrechts highlighted the importance of the discoveries, noting that the Cromwell Prospect discovery "dramatically enhances the potential of our entire Mt Isa North Project." The combination of high-grade copper and uranium targets across a district-scale footprint provides Antares with a compelling exploration portfolio. The company’s strong cash position of approximately $0.8 million supports continued drilling and evaluation activities planned for the coming quarters.
While the Carlingup Lithium-Nickel Project saw no exploration activity this quarter, Antares’ focus remains firmly on unlocking value from its Mt Isa North assets. The company’s methodical approach to exploration, combining geophysical surveys, drilling, and detailed fieldwork, continues to yield encouraging results that could underpin future resource development.
Bottom Line?
Antares Metals’ expanding copper and uranium discoveries set the stage for a pivotal phase of resource definition and value creation.
Questions in the middle?
- What are the next steps and timelines for resource estimation at the Cromwell Copper Prospect?
- How will Antares prioritise its uranium targets amid growing demand for nuclear fuel?
- What funding or partnerships might be pursued to accelerate exploration and development?
