The Garden Well deposit lies in the DGB in the north-eastern part of the Archean Yilgarn Craton of Western Australia. The DGB is characterised by a strong N-S structural trend defined by major faults and shear zones, regional folds and granite batholiths.

The geology of GWS UG consists of a sequence of folded sedimentary and volcanic rocks. The sequence can be differentiated into fine grained siltstones, lapilli and tuff volcaniclastics, sedimentary breccias, black shales, banded iron formation, chert, interbedded chert/shale and a footwall basalt unit. All of the units strike NNW at approximately 340-350o. Folding is tight and plunges approximately 20o to the SSE.

Primary mineralisation is present as pyrite beds and veinlets within the western limb of the syncline, hosted by siderite-altered chert. Mineralisation at GDW is strongly controlled by lithological rock type.

The maiden GWS UG MRE is estimated from the initial target zone at GWS and extends over 700m down plunge to a depth of 500 meters below natural surface.

Gold is hosted in a moderate east to steeply dipping shear zone trending N-S. Gold mineralisation within chert, shale and BIF is associated with brecciated zones including elevated sulphides and quartz veins.

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.

The GWS UG Project is currently planned to be mined over four years using conventional Long Hole Open Stoping (LHOS) mining methods using a combination of selective cemented rock fill and mineralised (ore grade) pillars.

The development and stoping schedule across the life of mine (LOM) has been sequenced to allow for a relatively rapid extraction rate of the Mineral Resource, without a protracted low production “tail”. Mine production has not been levelled as the UG ore displaces lower grade open pit mill feed as it becomes available, facilitated by the much larger processing capacity of the ~5Mt/a Garden Well plant.

The GWS UG Project will establish a portal and decline off the western wall of the Garden Well open pit approximately 130m below surface (mbs). This location sits around midway between the natural surface and the final planned depth of the Garden Well open pit of ~265mbs. A return air way and escapeway will be est ........

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