Garden Well is located on the eastern limb of the Erlistoun syncline of the Duketon Greenstone Belt. The gold of the Garden Well Deposit occurs as supergene mineralisation within upper Archaean regolith and as hypogene mineralisation in fresh rock. No significant amounts of gold occur in the transported quaternary clay sequence.

The gold is associated with intensely sheared and folded ultramafic and shale units that have been hydrothermally altered to a silica- carbonate-fuchsite-chlorite-pyrite-arsenopyrite assemblage, and underlying chert units.

The gold mineralisation trends roughly north-south over a distance of 2,100m and dips 50º to 60º east which is sub-parallel to the ultramafic-sediment contact.

The approximate dimensions of the deposit are 2,100m along strike (N-S), 600m across (E-W), and 500m below surface.

The mining method assumed in the Ore Reserve study is the same as that currently employed at the Garden Well Gold Mine, which utilises drill and blast, excavator and truck open pit mining. The existing pit has been designed to be developed in a series of progressive cutbacks.

Geotechnical and hydrogeological recommendations have been applied during pit optimisation and incorporated in design with ongoing reviews. No factors are applied to the Measured portion of the deposit. 5% ore-loss has been considered for the Indicated portions of the deposit in the estimation of the Ore Reserve. This is considered consistent with the current reconciliation to production, the style of estimation and experience from Regis’ other Duketon operations which use the same estimation approach, and is consistent with the suitability of earthmoving equipment to the orebody type (moderate grade and wide mineralised zones).

The UG operation will extend mining of the Garden Well mineralisation below and to the south of the existing operational open pit. Development of the portal is to commence in the March 2021 quarter and will exploit the UG Mineral Resource as it is currently known, which extends to a depth of 500 metres below surface and 700 metres to the south of the Garden Well open pit. The mineralisation is considered to have strong potential to extend further down plunge and this will be explored once UG mining has been established.

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