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12. March 2026
Us Mining Firm Stakes Claim On New Utah Antimony Deposit
American Tungsten & Antimony (AT&T) has announced significant findings from its initial drilling programme at the Little Emma Prospect, located within the company’s wholly owned Antimony Canyon Project in Utah. The discovery of high-grade antimony at this site marks a crucial milestone in AT&T’s mission to re-establish the domestic supply of antimony and tungsten, two critical minerals essential for national security and industrial applications.
The US Government has classified antimony as a critical mineral, highlighting its vital importance in defence systems, semiconductors, batteries, flame retardants, and advanced manufacturing. However, the country’s reliance on foreign sources, particularly China, poses significant concerns regarding supply chain security. AT&T’s efforts to develop domestic mines like Antimony Canyon aim to alleviate these concerns and ensure a stable supply of antimony.
The Little Emma Prospect is part of a district-scale exploration programme that underscores the potential for significant antimony discoveries in the region. The prospect has already been identified as a promising area due to its proximity to more than 20 historic antimony mines, all located within AT&T’s patented claim block. This abundance of historical mining activity suggests that there may be substantial continuity in the mineralised system, making Antimony Canyon an attractive location for further exploration.
The initial drilling programme has yielded impressive results, with key intercepts including 11.03m at 3.1% antimony from 25.91m, as well as 2.62m at 12.54% antimony from 29.2m. These findings validate AT&T’s geological model and offer a glimpse into the potential for substantial antimony deposits in the region.
The results are particularly noteworthy given their proximity to other significant antimony discoveries, such as the Stibnite Gold Project in Idaho, currently being advanced by Perpetua Resources. The outstanding grades of up to 66.47% Sb reported from Antimony Canyon compare favourably with those found at major North American antimony deposits.
The potential for a substantial antimony system in Utah is significant, and AT&T’s efforts to develop the Antimony Canyon Project are well-positioned to capitalize on this opportunity. The company’s portfolio of US projects, including the Tennessee Mountain Tungsten Project, Sage Hen Tungsten Project, Nightingale Tungsten Project, and Dutch Mountain Tungsten Project, demonstrates its commitment to diversifying its assets and reducing dependence on foreign sources.
AT&T’s strategic approach to developing the Antimony Canyon Project is also noteworthy. By focusing on both antimony and tungsten, the company is taking a holistic view of the mineral’s applications and seeking to capitalize on the synergies between these two critical minerals. This integrated approach not only enhances the potential for discovery but also provides AT&T with a stronger foundation for long-term success.
The shift in global trade policies and emerging tariffs have created uncertainty for companies operating in the mining industry. However, AT&T’s efforts to develop domestic mines like Antimony Canyon demonstrate its commitment to navigating these challenges and capitalizing on opportunities arising from shifting market dynamics.
As the US mining industry continues to evolve, it is essential that companies prioritize strategic planning, exploration, and development. By doing so, they can ensure a stable supply of critical minerals and contribute to national security and industrial growth.
The discovery of high-grade antimony at the Little Emma Prospect marks an exciting new chapter in AT&T’s history. The potential for substantial antimony deposits in Utah is significant, and AT&T’s efforts to develop the Antimony Canyon Project demonstrate its commitment to diversifying its assets and reducing dependence on foreign sources. As the company continues to explore and develop its portfolio of US projects, a bright future lies ahead.