QMines Uncovers Consistent High-Grade Copper at Sulphide City

Strong Continuity in Sulphide City Mineralisation

QMines Limited (ASX – QML) has announced encouraging results from its ongoing drilling campaign at the Sulphide City deposit, part of the Develin Creek project in Queensland. The company has completed 42 drill holes, totaling nearly 7,900 meters, revealing broad zones of copper-zinc-gold mineralisation with impressive grades. These results confirm the excellent continuity of the deposit, a critical factor for future resource development.

Among the highlights are several significant copper equivalent intersections, including 16 meters at 2.29% CuEq and 11 meters at 2.39% CuEq, with higher-grade intervals within these broader zones. Such findings underscore the deposit’s potential as a substantial source of feed for QMines’ planned Mount Chalmers processing plant.

Advancing Geological Understanding Through Diamond Drilling

The company is complementing its reverse circulation drilling with diamond core drilling to gain a more detailed understanding of the deposit’s geometry and sulphide mineralisation style. Four diamond core holes have been completed, with further holes underway. This approach aims to clarify the complex architecture of the massive and semi-massive sulphide bodies, which exhibit textures and mineral assemblages typical of volcanic-hosted massive sulphide systems.

QMines’ Executive Chairman, Andrew Sparke, emphasized that the drilling program is progressing well and is integral to updating the resource model and conducting an optimisation study for Sulphide City. The company is targeting an updated Pre-Feasibility Study (PFS) by the second half of 2026, integrating data from Develin Creek and other regional projects.

Broader Project Pipeline and Strategic Outlook

Beyond Sulphide City, QMines is preparing to commence maiden drilling at the Mount Mackenzie gold-silver project in October 2025. This shallow, high-grade deposit represents a complementary asset to the copper-zinc focus at Develin Creek. The company is also advancing mine design and metallurgical testwork across its portfolio to optimise processing and economics.

QMines’ strategy to blend feed from multiple deposits into a centralised processing facility at Mount Chalmers aims to enhance operational efficiency and extend mine life. The upcoming PFS will provide a comprehensive assessment of this integrated approach, incorporating updated resource estimates and capital cost evaluations.

Geological and Historical Context

The Develin Creek project sits within a largely unexplored volcanic belt hosting volcanic-hosted massive sulphide (VHMS) deposits. The mineralisation style at Sulphide City is complex, involving submarine basaltic volcanism and hydrothermal alteration processes. Historical exploration and resource estimates have laid the groundwork, with QMines building on this legacy through systematic drilling and modern assay techniques.

With a total resource base that includes measured, indicated, and inferred categories, QMines is well-positioned to advance these assets towards production. The company’s disciplined approach to exploration and development reflects a clear pathway to sustainable copper and gold output from the region.