The Koppamurra Project is a frontier ionic clay rare earth opportunity in South Australia and Victoria, Australia


AR3 holds exploration licences, or licence applications, for the area between Comaum and Keith in South Australia and Apsley in Western Victoria, Australia.

Two large prospects for rare earth elements have been discovered on AR3 tenements, being the Yellow Tail and Red Tail prospects.

Australian Rare Earths

To support AR3’s vision to secure rare earth element materials for a more sustainable future, the following rare earth elements are the prime targets of our activities:

Light Rare Earth Elements

Heavy Rare Earth Elements


To date, AR3 has yielded promising exploration success at Koppamurra, with the discovery of the Red Tail and Yellow Tail deposits. These discoveries have resulted in the declaration of a maiden JORC 2021 Inferred Mineral Resource of 39.9Mt @ 725ppm TREO.

AR3 is uniquely positioned to grow this maiden resource, with over 4,000km2 in either granted exploration tenure or Exploration Licence applications in place in regionally analogous depositional settings to the red and yellow tail deposits.

The exploration and mineral resource definition techniques being deployed for this style of deposit are highlighted by low-cost and low environmental disturbance – shallow drilling. Drilling exploration is being undertaken with small Landcruiser mounted drill rigs, requiring no dug sumps or vegetation clearing. The shallow target host clay lies above the water table and the local limestone aquifer and is therefore not impacted as part of the exploration activities. Drillholes are completed in a matter of hours and backfilled immediately before moving on to the next location.

AR3 places a high value on protecting the local environment and is working hard to ensure it can sustainably co-exist with other land users including the agricultural, viticulture and forestry sectors. As such AR3 maintains a strong focus on ensuring its activities will not impact the regions precious water resources, not only now but into the future.

All exploration activities at Koppamurra are conducted in accordance with an approved EPEPR – Exploration Program for Environment Protection and Rehabilitation pursuant to the Mining Act 1971 and approved by the Minister for Energy and Mining. The strong regulatory framework in South Australia provides a solid foundation to underpin AR3’s focus on being a sustainable explorer and developer of rare earth elements.

Low-impact mining method

Clay hosted rare earth mining is shallow-excavation mining involving progressive rehabilitation and is much lower impact than many other forms of mining.

The deposits of interest are non-radioactive, which is a significant advantage over other mineral sand and ‘hard rock’ rare earth element deposits. The progressive rehabilitation process will allow for the rapid restoration of the land to its former condition, along with the potential in some areas, working with landowners, to optimise the productivity of the land returned to them.

We value the agricultural landscape in the regions in which we operate and understand that water is a scarce commodity and needs to be secured for current and future generations. AR3 will be focussed on ensuring our activities will not impact the regions precious water sources.

Partners with our community

Our tenements are part of a region that’s home to some of our most precious environments and are nationally recognised for their strategic value as a critical primary production area.

The rare earth elements AR3 are targeting this region are critical to producing cleaner energy technologies aimed at decarbonising economies and building a more sustainable future, therefore we must find ways to investigate and extract these materials in a safe and responsible manner, with a focus on protecting the communities in which we operate.

AR3 want to maintain open and honest communication with our community and other stakeholders to build respectful and positive relationships for the long term. If you have any questions or concerns about our activities or just want to know more about our operations, please contact us, or register to receive our updates.