Dianne Project

Project snapshot

The Dianne Project is located around 260km from Cairns in far north Queensland. The mine is covered by six active mining leases and an exploration permit.

The compact and high-grade nature of the known mineralisation at Dianne presents the proven potential for one of the world’s lowest cost copper operations.

The project is made up of a very high-grade copper in a massive sulphide lens coincident with a broad, shallow area of continuous copper oxide mineralisation (Green Hill supergene zone).

It has been interpreted as a strataform volcanic massive sulphide (VMS) deposit. Revolver undertook a detailed geological review comprising field mapping, re-logging and petrography, which has resulted in the view that the Dianne deposit is a Besshi-style VMS lens that has been deformed during regional scale folding and locally overprinted by an orogenic quartz vein gold event associated with the Palmer River gold field.

Recent exploration

November 2025

Updated Mineral Resource Estimate

The November 2025 Mineral Resource Estimate (MRE) for the Dianne Copper Deposit reports a total Mineral Resource of 1.31Mt at 1.38% Cu, 0.52% Zn and 3.82 g/t Ag, containing 18.0kt of copper, 6.8kt of zinc and 161koz of silver.

The MRE incorporates results from Revolver’s recent pre-development drilling program and includes:

1.22Mt at 1.13% Cu within the Greenhill supergene oxide open-pit domain (0.25% Cu cut-off), forming the basis of the planned heap-leach restart strategy.
A high-grade below-pit primary sulphide component of 86kt at 4.92% Cu (1.5% Cu cut-off), providing potential for future open-pit extension and/or underground mining.

The MRE reflects a 140% increase in Indicated tonnes, a 26% uplift in copper grade, and a modest increase in contained copper metal compared to the 2022 estimate, significantly strengthening confidence in the geological model and mine restart plan.

Workstreams supporting the Dianne Copper Mine Project continue to advance, with ongoing optimisation studies, pre-construction activities and further exploration expected to provide opportunities to grow the Mineral Resource and support longer-term development scenarios.