American Rare Earths–Novex magnet metals: process routes and risks for mine planners
Reviewed by Tom Sullivan
First reported on MINING.com
30 Second Briefing
American Rare Earths and Novex have signed an MoU to develop US rare earth metal production using feedstock from the 2.63‑billion‑tonne Halleck Creek deposit in Wyoming, aiming for a fully domestic mine‑to‑magnet supply chain. The partnership will focus on metallising neodymium‑praseodymium (NdPr) oxide and qualifying samarium, dysprosium and terbium products, closing the current US gap in converting separated oxides into magnet‑grade metals. Process options under review include fluoride conversion with calciothermic reduction, lanthanothermic reduction and high‑temperature molten salt electrolysis, with the latter identified as the cleanest route.
Technical Brief
- Halleck Creek’s 2.63‑billion‑tonne rare earth resource is described as the largest contained REO deposit in the US.
- A non‑binding US Export‑Import Bank letter of interest of up to $456 million underpins potential project financing.
- The MoU covers joint design of a US rare earth metal production facility, not just testwork.
- Wyoming value chain scope explicitly runs from ore mining through refining, separation and metal production into magnet feed.
- Novex’s role centres on oxide‑to‑metal conversion know‑how, complementing American Rare Earths’ upstream resource position.
- High‑temperature molten salt electrolysis is favoured partly to avoid anhydrous hydrogen fluoride handling and associated off‑gas controls.
- Lanthanothermic reduction is being reserved for more volatile rare earth metals where fluoride routes are less suitable.
- From 1 January 2027, US defence contracts will restrict magnets containing REE mined, refined or separated in China, creating a hard deadline for domestic qualification.
Our Take
American Rare Earths’ Halleck Creek work has already been pulled into US government-backed R&D via the DOE-led METALLIC consortium and an NSF STAR award, so pairing that technical pipeline with Novex’s magnet manufacturing positions the Wyoming asset as more than just a raw ore supplier in the US supply chain.
The 2.63-billion-tonne mineral resource at Halleck Creek, combined with the 2027 start date for US defence magnet restrictions, suggests this project could be timed to offer long-life, policy-aligned feed for neodymium-praseodymium and dysprosium-terbium magnets as defence contractors pivot away from Chinese material.
Within our mining database, rare earths pieces tagged to the USA are still a small subset of the 1301 Mining stories, so repeated coverage of American Rare Earths and Wyoming projects signals that this district is emerging as one of the few consistently advancing US rare earth oxide hubs.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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