Garden Well.
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.

Rosemont.
Rosemont gold deposit is hosted in a quartz dolerite zone of a dolerite sill intruding ultramafic and argillaceous sedimentary units of the western limb of the Erlistoun Syncline in the Duketon Greenstone Belt.

Gold mineralisation is associated with brittle fracturing and quartz albite sericite carbonate sulphide alteration within the quartz dolerite. Most gold occurs below the weathered profile in saprock and fresh rock with the upper saprolite being leached of gold.

The mineralisation trends NNW over a strike length of 4.9km and dips steeply to the east and west, varying along strike.

Erlistoun.
Erlistoun is an Archaean orogenic gold deposit hosted in narrow quartz veins within sheared intermediate to felsic intrusions located on the eastern limb of the Erlistoun Syncline. The host units are bounded by a granodiorite on the east and adjacent to a dolerite and ultramafic unit to the west. Gold mineralisation is hosted in quartz veins and associated shear zones with high grade pods of gold mineralisation associated with weathering event horizons. Gold mineralisation trends N to NNE over a strike length of 1.9km and dips shallowly at 40° to the west.

The mining method assumed in the Ore Reserve study is the same as that currently employed at the Rosemont, Garden Well and Erlistoun Gold Mines, which utilises drill and blast, excavator and truck open pit mining.

The Rosemont operations include Rosemont open pit and underground mine, as well as Baneygo open pit. The Rosemont and associated surface deposits are mined using conventional open pit mining truck and shovel methods. The Rosemont underground produces approximately 600Ktpa and is mined using mechanised open stoping.

The Duketon South Operations (“DSO”) includes the Garden Well, Rosemont, Erlistoun, Baneygo and other satellite projects in proximity to the Garden Well processing plant.

The plant design is based on a nominal 2.5Mtpa throughput rate and utilises a two stage crushing circuit and single ball mill to produce slurry that is pumped via a 12km pipeline to the Garden Well carbon in leach circuit.