American Rare Earths’ Halleck Creek project has once again demonstrated its potential to be one of the largest rare earths deposits in the US, with new assays showing high rare earth grades from surface to 175.5m.

That’s up a whopping 75.5% over the depth drilled for the maiden drill campaign of 100m last year. The project’s globally significant exploration target of 1.01 to 1.27 billion tonnes was also based off a depth of 100m.

The latest results therefore show there’s room for the exploration target to expand – and the deposit is still open.

All this puts American Rare Earths (ASX:ARR) closer to defining a substantial maiden JORC resource for the Wyoming project this Quarter.

Also highly encouraging for is that  27% of the rare earths mineralisation includes the highly valuable magnetic rare earth elements essential for the clean energy transition.

That’s consistent with the results released just last week when ARR announced enriched rare earth mineralisation at depths of 150m.

Major intercepts include averages of 4,303ppm total rare earth oxides (TREO) over 169.5m and 6,948ppm over 37.5m TREO over 150m.

ARR now has complete assay data for 15 holes and partial assays for three additional holes in the Red Mountain project area.

The team is now waiting on the final results for three additional holes in the Red Mountain project area and 20 holes in the Overton Mountain project area from ALS laboratories in Vancouver.

Chief Executive Officer and Managing Director Chris Gibbs said he was excited to announce the latest assay news.

“These are outstanding results and we have consistently seen mineralisation from surface to depths of 150m. Although only one hole, it is extremely encouraging to see mineralisation now extend to at least 175.5m.

“This is a 75.5% increase in depth from the maiden drill campaign and well exceeds the basis of the original exploration target of 100m.

“We are encouraged about the prospect of a significant rare earth structure at depth and are looking forward to conducting further drilling to determine how deep the deposit is.

“However, our priority is to establish a significant JORC resource, and at depths of 175.5m we already see the basis for a large scale, long life open pit mine on the magnitude of the major copper/gold porphyry deposits, so often seen in the Western USA.

“Let’s also keep in mind that these recent assay results are from the Red Mountain area, which is only one of seven zones we have identified in this massive rare earth district.

“We’re now eagerly anticipating the remaining drill assay results, including assays for the Overton Mountain zone which was also drilled during this most recent campaign.”

Growing the district

The most recent assay results come only two weeks after ARR filed 118 new mining claims in the district.

These add ~855ha to the district, bringing the total area controlled by ARR to 3304ha and expanding total claims in the region by 26%.

What’s down the road

More metallurgical test work also in progress on Halleck Creek ore, which has so far shown very low levels of radioactive elements, which are often found in higher quantities at other rare earths project.

Alongside other features of the ore, this will help ARR cut costs and the environmental impacts of separating the sought-after minerals.

ARR continues to collaborate with top-tier R&D partners including the US Department of Energy Innovation Hub, the Critical Minerals Institute and the Critical Materials Institute to transform the rare earths industry into a cleaner and more sustainable one.

In Arizona the company is advancing its La Paz project, which has a  current JORC Resource estimate of 170MT, with drilling targeting ~742-928MT of rare earths mineralised rocks to establish a JORC resource for the SW area.




This article was developed in collaboration with American Rare Earths (ASX:ARR), a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.