American West Metals may have just thrown open the growth doors at its 100 per cent-owned West Desert project in Utah, 160km southwest of Salt Lake City, after drilling confirmed a new critical minerals corridor beyond America’s largest undeveloped indium resource.
The discovery comes as Washington scrambles to secure domestic supplies of indium, a metal increasingly critical to artificial intelligence, defence and advanced technologies.
The discovery has confirmed management's belief that a previously untested 4km-long magnetic anomaly east of the existing deposit is directly linked to high-grade indium, zinc, gold and copper mineralisation, opening a major new growth front. It has also validated magnetic geophysics as a targeting tool across a mineralised trend stretching more than 5km.
American West's step-out hole was drilled 430m east of the current resource at its Black Dragon prospect and cut a continuous 108.4m interval grading 25.2 grams per tonne (g/t) indium, 1.24 per cent zinc, 0.34g/t gold and 5.3g/t silver from 471m.
The broad zone included 57.8m at 33.3g/t indium and 2.1 per cent zinc, alongside 16.2m at 44g/t indium, 2.6 per cent zinc and 0.94g/t gold. Peak grades reached 140.5g/t indium, 14.3 per cent zinc, 4.79g/t gold and 81.1g/t silver.
The new assays have boosted the continuous mineralisation by a further 40 per cent, effectively transforming the previously reported 77.65m interval of visual sulphides from April into a confirmed high-grade indium-zinc-gold discovery.
Management says, importantly, the magnetite-rich skarn has validated the company’s geological model and magnetic targeting approach, leaving most of the corridor still waiting for the drill bit. Geological modelling suggests the mineralised contact may continue up-dip towards surface, adding further growth potential.
The discovery may also have dialled up a lucrative new gold angle. Drilling intersected a high-sulphidation gold overprint grading up to 4.79g/t gold that management says could signal separate gold-dominant skarns along the porphyry margin.
American West Metals managing director Dave O'Neill said: "These outstanding assay results from drill hole WD26-01 mark a major discovery for the West Desert Project and reinforce its position as one of the most compelling critical minerals opportunities in the United States."
The scale is already substantial. West Desert hosts a JORC-compliant inferred resource containing 23.8 million ounces of indium, making it the largest undeveloped indium resource in the US. Only 35 per cent of historical drill samples were assayed for indium, leading management to believe the endowment could be considerably bigger.
Significant zinc, copper, silver and gold inventories add further weight to the project's development potential.
The discovery sits within Utah's prolific Sevier Orogenic Belt. Management says the emerging geological model shares similarities with major porphyry-related skarn systems, including the giant Bingham Canyon mine and the historic Tintic mining district.
Pathfinder elements such as tungsten, bismuth and arsenic are also helping to sharpen future targeting.
Demand for indium is surging as artificial intelligence infrastructure, optical networking, semiconductors and defence technologies consume increasing volumes of the metal.
Nvidia has reportedly called for a 20-fold increase in indium phosphide laser supply by 2030. Meanwhile, the United States remains entirely reliant on imports and China continues to dominate global supply following recent export restrictions.
West Desert sits on privately owned land, providing a potentially faster pathway to development approvals than many US critical minerals projects. American West is also engaging with US government agencies on critical minerals funding, supply and future production as it looks to strengthen domestic supply chains and reduce reliance on imported indium.
A third drill hole is already underway 350m east of the discovery and assays from a second hole are expected shortly. A second rig has also been secured to accelerate exploration.
The new hole will target the porphyry-skarn contact and magnetic anomaly east of the recent discovery hole. Future drilling and downhole electromagnetic surveys are planned to test continuity and extensions towards surface.
Investors will likely be watching the upcoming results closely as management works to determine whether the emerging 4km corridor can transform one of the world's largest undeveloped indium deposits into a district-scale critical minerals play.
With drilling stepping further east, attention is likely to turn to just how big West Desert can become.
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By Penny Taylor
