The Boonanarring deposit is split into two strands; East and West. The eastern strand is generally higher in heavy mineral content than the lower grade western strand. To get consistency of the grade of the ore being fed to the WCP, the eastern and western strands will be blended. Ore feed has been constrained to a maximum of 500 t/h at 85% utilisation of SMU feed. This will be the primary production constraint.

Boonanarring is hosted in the Perth Basin, in the Pleistocene Yoganup Formation on the eastern margin of the Swan Coastal Plain. The Yoganup Formation is a buried pro-graded shoreline deposit, with dunes, beach ridge and deltaic facies. This formation lies unconformably over the Lower Cretaceous Leederville Formation and is overlain by the Pleistocene Guildford Formation and the Quaternary Bassendean Sand. The Yoganup Formation consists of unconsolidated poorly sorted sands and gravels, with local interstitial clay and heavy minerals that occur sporadically along the Gingin Scarp, which is interpreted to be an ancient shoreline that was stable during a period of marine regression. Boonanarring has three major strandlines of heavy minerals, which are interpreted to have been deposited during the Pleistocene in a notch in the local basement rock that may represent an ancient sea cliff. Lower grade mineralisation is present in the sands overlying the higher-grade strandlines. The basement to the strandline mineralisation is identified by the increased slimes content of the Leederville Formation or at the base of the Yoganup Formation. Mineralisation within this has high zircon concentrations.

Mining will be conducted by a qualified mining contractor incorporating concurrent tailings disposal and rehabilitation of mined-out areas. After mining is completed at Boonanarring, the mining fleet and processing equipment will be relocated to Atlas. Total life of the current reserves for both deposits is 8.

The BFS is based on mining the Boonanarring deposit first, using conventional, dry, open pit mining techniques to extract the ore, and using standard gravity separation in a Wet Concentration Plant (WCP) to recover the contained Heavy Minerals (HM) into a Heavy Minerals Concentrate (HMC) for sale. The HMC will be transported by road to a storage facility at Bunbury where it will be loaded onto ships and transported in bulk to China.

The mineral processing operation will consist of two main sections:
- Slurry mining unit (SMU)
- Wet concentrating plant (WCP).

Selection of the key process stages and parameters were based upon the metallurgical testwork conducted by AML. The SMU primarily consists of:
- feed bin, vibrating grizzly feeder
- scrubber feed conveyor
- a rotating drum scrubber with trommel screen, and pumping system
- supporting equipment on a transformer skid.