Revolver Resources (ASX: RRR) has delivered a substantial upgrade to the mineral resource at its Dianne copper project in north Queensland.
The new model outlines 1.31 million tonnes at 1.38% copper, representing a 26% increase in grade compared with the previous estimate.
Revolver said the revised resource strengthens the company’s strategy to restart operations at Dianne as early as late 2025 or early 2026.
Increase In Resource Confidence
The upgrade includes a 140% lift in Indicated resources, with 1.09Mt now sitting in the higher-confidence category—forming 86% of the pit-optimised inventory.
Revolver attributed the expansion to infill drilling, improved geological modelling, and refined definition of the copper domains, all of which contributed to a more robust interpretation of the deposit.
The update also marks the first time zinc, silver, and gold estimates have been reported for Dianne, reflecting the broader multi-metal potential of the system.
The Greenhill supergene oxide domain — central to the company’s planned low-cost heap leach restart — now stands at 1.22Mt at 1.13% copper for 13,774t of contained copper.
Ongoing metallurgical test work continues to show strong recoveries from this material, supporting the feasibility of near-term copper cathode production and reinforcing confidence in the initial development pathway.
Deeper High-Grade Zone
Below the planned open pit, the high-grade primary zone contributes a further 86,800t at 4.92% copper for 4,274t of contained copper.
“Successfully upgrading a much larger component of the Greenhill open-pit mineralisation to Indicated status delivers us a very strong foundation from which to restart mining operations and commence heap leach plus SX-EW processing to produce copper cathode on a capital-lite basis,” managing director Pat Williams said.
The zone remains open down-plunge, providing clear scope for future underground or pit-extension scenarios once the initial restart phase is established.
Drilling completed between 2023 and 2025 confirmed strong geological continuity at depth, positioning Dianne for potential life-of-mine growth beyond the current development horizon.
Offtake, financing, and remaining study inputs are progressing in parallel ahead of a targeted final investment decision.
