Summary

Mine Type	In-Situ
Status	Care and Maintenance
Commodities	Potash
Mining Method	Brine mining
Production Start	...
Snapshot	The Western Australia State’s single producing potash project, Beyondie, was suspended after its owner Kalium Lakes, entered administration in August 2023 and ultimately liquidation. On 16 December 2024, after receiving shareholder approval, the Reward Company acquired the Beyondie Potash Plant, administration and operation offices and minor associated infrastructure. As at the period ended 30 June 2025, the Beyondie Potash Plant and associated assets are under care and maintenance activities with evaluation and engineering studies underway ahead of plant relocation activities. There is potential for Reward to relocate the plant within a joint venture scenario with an existing seawater solar salt operation in Australia or overseas to produce SOP from waste brines. Another development scenario is to redevelop the Beyondie project using the plant in its current location and produce SOP from the historically identified Beyondie resource brines.

Deposit type

• Brine
• Sedimentary

Summary:

The deposit is a brine containing potassium and sulphate ions that can form a potassium sulphate salt. The brine is contained within saturated sediments below the lake surface and in sediments adjacent to the lake. The lakes sit within a broader palaeovalley system that extends over hundreds of kilometres, this system has been eroded into the North-West Officer Basin sediments.

The lake bed alluvial sediments form the upper surficial aquifer and host the first brine horizon. The second brine horizon is hydraulically connected to the upper aquifer and comprises the lacustrine clay. The basal sand of the palaeochannel and the fractured bedrock form the third and fourth brine horizons and are considered to be hydraulically disconnected from the shallow aquifer.

The Project area is located within the Collier, Salvation, Scorpion, and North-West Officer Basins. The Marymia Dome is located on the northeast fringe of the Yilgarn Craton (southeast magin of the Basins) and comprises Archaean greenstone belts intruded by granites, and notably monzogranitic rocks, which outcrops to the south of the Project.

Monzogranites are characterised as potassium rich and composed mostly of quartz and potassium feldspar (alkali-feldspar); their proximity to the BSOPP area, along with other granitic inliers, makes them a suspected source of the potassium enrichment in the region’s sub-surface brine deposits.

Hydrogeology
Two regional aquifer units have been identified within the Cenozoic sediments, the palaeochannel sand aquifer of Eocene age that is located at the base of the palaeo-drainage system, and the shallow surficial aquifer comprising Pliocene and Quaternary evaporites, calcrete and silt of the lake surface and alluvium. These aquifers are considered to be hydrogeologically separated from one another by a thick sequence of stiff lacustrine clays that form an aquitard.

The regional bedrock is considered to be on the whole of low aquifer potential; however deep weathering profiles in sandstones of the Jilyili Formation and vesicular basaltic sills in the vicinity of the palaeovalley have proven to be highly prospective aquifer targets from the 2018 drilling program. In addition, regional structural features described above and specifically the unconformity between the Willy Willy Formation and the Backdoor Formation enhance aquifer transmissivity as linear features.

Groundwater within the surficial aquifer is generally between 0.2 m and 11 m below ground level, with depth to the ground water table determined by location within the catchment and local topographic changes. Groundwater flow within the surficial aquifer is generally driven by rainfall and episodic creek flow recharge to the aquifer system. The groundwater flow direction generally follows the surface topography, with recharge and groundwater mounding dominant in the ephemeral creek systems and discharge via evaporation occurring in the playa lakes through evaporation.

Off lake the surficial aquifer generally comprises of low transmissivity silt and soft clay unless calcrete is encountered. Calcrete is characterised by secondary porosity with very high transmissivity, but moderate to low storage.

The palaeochannel sand aquifer is a confined porous system, laterally bounded by the edges of the palaeovalley system and the poddy nature of the sand sequences. The aquifer can be characterised as behaving as a strip aquifer system where multiple reduced hydraulic conductivity boundaries.

Mining Methods

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Comminution

Crushers and Mills

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Processing

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Commodity Production

Commodity	Units	2022
Sulfate of potash (SOP)	t	....

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Oct 9, 2025