Deposit Type The Plutonic Gold Mine deposits are Archean Greenstone gold deposits. The gold mineralisation is predominantly structurally controlled occurring in a variety of stratigraphic settings, mainly associated with replacement-style lodes and stockwork veining within a wide variety of host rocks ranging from ultramafic and mafic volcanic rocks, metasediments, felsic intrusive, volcanoclastic units, and banded iron formations. In the Hermes Gold Mine and BBJV Projects there are two broad mineralisation styles (Outhwaite, 2013) referred to here as the Peak Hill Type and the Bryah Type. The Peak Hill Type gold deposits are hosted in rocks that are generally highly deformed (four or more fold events) and metamorphosed (up to amphibolite facies), generally represented by the Peak Hill Schist Formation. Mineralisation is early in the paragenesis, (syn- to post-D1 isoclinal folding) with folded mineralisation commonly observed. Previously mined examples include Peak Hill Main/Five-Ways, Mt Pleasant, Jubilee, Wilgeena and St Crispin. The Hermes deposits may be examples of mineralisation that belongs in this category. The local controls on this deposit class are difficult to identify, because of the effects of strong, postmineralisation deformation, and probable remobilisation of Au. Mineralisation Plutonic The Plutonic Gold Mine Mineral Resources mined and unmined lie with a surface area of approximately 10 km east-west by 5 km north-south. The historical Plutonic Main Pit ........

Ore feed to the mill during 2020 - 21 was from mining operations at Plutonic Underground (underground mining methods), the Area 4 and Perch Open Pits and surface stockpiles of mineralised waste which commenced in November 2019 after the Hermes Open Pit ores were depleted. The current plan anticipates continued ore feed from these mining operations.

There is substantial site history and experience with the underground mining methods employed. The only previously unmined area in the underground Mineral Reserve mine plan is the Baltic Extension and Western Front (Indian & Baltic West) area, which is envisaged to continue to employ those mining methods.

Open pit mining has been undertaken by Billabong at Area 4 and Perch over the last year and the open pit Mineral Reserve is based on this extensive experience.

Plutonic Underground
Plutonic Underground is a mechanised access underground mine that has been in continuous operation since 1995. Historically the mine has produced at a rate of up to 1,400 ktpa ore, although in recent years' production has stabilised at approximately 800 ktpa. The current constraint on underground production is not the infrastructure: the constraint is gathering the data to move the stopes through the planning process and into production.

The Plutonic Underground has seven active mining zones. Seven of these mining zones are well-established having been active for several years (Established Areas). The eig ........

- subscription is required.

The primary sections of the processing plant that are currently in use are:

• Crushing and conveying
• Ore reclaim and grinding
• Leaching and carbon adsorption
• Carbon stripping, electrowinning, refining and carbon regeneration
• Tailings thickening
• Tailings deposition and storage
• Reagent mixing and handling
• Plant services.

Leaching and adsorption
The leach and adsorption circuit consists of two leach tanks and six CIL carbon adsorption tanks, all with a 1,020m3 capacity. All tanks mechanically agitated with dual, open, down- pumping impellor systems powered by 55kW drives. Facilities are currently available to inject oxygen into tanks #1, #2, #3, #4 and #6, with a high shear MMS oxygen injector feeding into Tank #1. Gold in solution is recovered and concentrated by adsorption onto activated carbon in the adsorption tanks. Leach tank 1 is used as a pre-oxidation (oxygen sparged) conditioning tank, to oxidise reactive ........