Summary

Mine Type	Open Pit
Stage	Restarting
Commodities	Copper Gold Silver Zinc
Mining Method	Truck & Shovel / Loader
Project Timeline	...
Mine Life	...
Snapshot	Dianne Project is characterized by compact and high-grade mineralisation, presenting proven potential to become one of the world’s lowest-cost copper operations. Dianne commenced development in 1979 with a small-scale underground and open pit mine operating until 1983 when mining was suspended. The Dianne Deposit, which previously hosted one of the highest-grade operating copper mines in the world, is situated in the eastern part of the Dianne Project. Revolver’s Dianne Project is focused on a low capital cost, heap leach/SX-EW development of the existing Mineral Resource at the Dianne Deposit. It is planned that the Project will be a small-scale operation with mining completed within a 3-year timeframe, with a contractor performing open-pit mining and processing activities. All remaining critical pre-construction earthworks activities at Dianne have now been completed. As of Jan. 2026, the Project has now progressed to a stage of being construction-ready.

Deposit type

• VMS

Summary:

The Dianne deposit is hosted in deformed Palaeozoic shale and greywacke of the Hodgkinson Formation. Geologically, the Dianne Deposit represents a well-preserved volcanogenic massive sulphide (VMS) system hosted by interbedded shales, greywackes, and volcaniclastic rocks of the Upper Devonian–Lower Carboniferous Hodgkinson Formation. The mineralisation is closely associated with a north–south trending subvolcanic intrusive complex composed of altered micro-granodioritic dykes and sills, interpreted to be the primary hydrothermal conduit and heat source. Copper occurs predominantly as chalcopyrite and chalcocite, with minor sphalerite and silver, within steeply dipping semi-massive to massive sulphide lenses. Locally the massive sulphide lens at Dianne includes a splay to the west hosting additional structurally hosted, moderate grade Cu along with a large halo of associated oxide mineralisation forming the Greenhill domain.

Weathering and supergene processes of the deposit has altered the mineralisation of the deposit with three distinct styles of mineralisation occurring:
• primary massive sulphides consisting of pyrite, chalcopyrite and sphalerite;
• enriched supergene sulphide composed of pyrite and chalcocite and;
• an associated low grade mushroom shaped halo of supergene oxide copper mineralisation, the Green Hill deposit, comprising stockwork and disseminations of malachite, azurite cuprite, tenorite chalcocite and native copper.

The copper (zinc-silver-cobalt-gold) deposit was identified in 19552 with ongoing exploration leading to the development of a small-scale underground and open pit mine operated between 1979-83. Production from the chalcocite enriched sulphide mineralisation from the massive zone totalled 69,820 tonnes of high-grade direct shipping ore assaying between 18-26% Cu and approximately 359 g/t Ag.

Mining Methods

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Comminution

Crushers and Mills

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Processing

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Commodity Production

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Feb 19, 2026
.......................	.......................		Feb 19, 2026

Total Workforce	Year
......	2026