The Wiluna West project covers a 25 km strike length over the Joyners Find Greenstone Belt, near the northern margin of the Yilgarn Craton. The Joyners Find Greenstone Belt is a narrow (5 km to 10 km) north-south striking greenstone belt comprising low ridges of BIF (in the central and eastern portion) intercalated with mafic and ultramafic schists with minor chert and clastic sediment horizons. The Joyners Find Greenstone Belt strikes north and dips steeply to the west. Folds developed during the D2 deformation event are observed in the BIF ridges as tight to isoclinal folds oriented north-south with west dipping axial planes. The BIF ridges are variably deformed and intensely folded.

Two regional dextral shear zones are recognised: the Joyner’s Find Shear Zone (JFSZ) strikes to the north through the centre of the belt and is parallel to the lithological strike; and the Brilliant Shear Zone (BSZ) which is oriented north-northwest.

There are three main Banded Iron Formation (BIF) units which form ridges within the project area (Units A, B and C). High grade DSO hematite mineralisation occurs within units B and C with grade occurrences of up to 69% Fe. Iron mineralisation occurs within BIFs surrounded by inter-bedded mafic and ultramafic schist units. The two main ridges show distinctive mineralisation styles with B ridge showing a much lower proportion of remnant bedding and generally a significantly higher portion of haematite especially in the top 20 m. Mineralisation of the B ridge is also much more continuous along strike occurring semicontinuously for over 15 km. The mineralisation on the C ridge typically occurs in a series of pods of up to 20 Mt separated by poorly or unmineralized BIF. These pods appear to be controlled by structural deformation and are generally confined to the western side of the formation.

The deposit is outcropping and mining of the C4 pit commenced in December 2020.

The Stage 1 pit will extract 1Mt of high-grade and high quality (low impurities) DSO product with a low strip ratio of 1:1.25.

Additional to this there is significant opportunity to delineate further pods of surface ore and extend the project life from not just C4, but other shallow deposits at the WWIOP adjacent to C4.

The ore will be fed into the hopper of the primary crusher using a front-end loader. The crushed material from the primary crusher will then fed directly to a screen, set for a 32mm split size. The undersize material will report to the secondary screen while the oversize material will report to the secondary crusher. The undersize material from the secondary screens will report to the fine’s product stockpile and the oversize material will report to the lump product stockpiles.

Ore processing consists of crushing and screening of the ore through a modular constructed two-stage crushing and screening plant to produce lump and fines using an electric powered modular mounted crushers, screens and portable conveyors. The plant produce two products: a lump product which is between 31.5mm and 6.3 mm product and a fine product (- 6.3 mm).