American Tungsten Defines High-Grade Targets at Tennessee Mountain Ahead of Drilling

Surface Sampling Confirms Fertile Tungsten-Molybdenum System

American Tungsten & Antimony Ltd (ASX:AT4) has unveiled compelling surface sampling results from its Tennessee Mountain Tungsten Project in Nevada. The company reported a system-scale tungsten soil anomaly stretching over several kilometres, alongside high-grade tungsten and molybdenum mineralisation at the historic Garnet Mine. Channel samples returned standout grades of 4,713 ppm tungsten (0.59% WO₃) over 1 metre and 4,191 ppm tungsten (0.53% WO₃) over 2 metres from outcropping skarn, while rock chips hit a peak molybdenum grade of 20,693 ppm (2.07% Mo).

These results bolster the geological model suggesting a fertile W-Mo skarn system extending beyond the known workings and open both laterally and at depth. The co-occurrence of tungsten and elevated molybdenum, along with pathfinder elements such as bismuth, tin, zinc, and copper, points to proximity to an intrusive feeder zone, a hallmark of major intrusion-related skarn deposits.

Maiden Drill Program to Test Extensions of Historic Mineralisation

In response to these encouraging findings, AT4 is preparing a maiden drill program comprising 29 holes for approximately 3,000 metres. The campaign aims to systematically test the lateral and depth extensions of scheelite mineralisation along the granodiorite/limestone contact at the Garnet Mine. This will be the first modern drilling effort at Tennessee Mountain, designed to generate a JORC-compliant dataset that could underpin a future mineral resource estimate.

Five holes are planned to focus on the immediate vicinity of historic workings, with others targeting soil and rock chip anomalies beneath surface exposures. The drill targets were prioritised based on a 200m by 200m soil sampling grid that delineated tungsten anomalies up to 257 ppm W and multi-element signatures consistent with skarn mineralisation. The soil anomaly remains open along strike, indicating the potential for a larger mineralised system.

Permitting and Strategic Positioning in US Critical Minerals Supply Chain

AT4 is actively advancing permitting efforts with the US Forest Service, preparing a Plan of Operations required for drilling on federally administered land. Approval is anticipated in the near term, with further updates expected as the process unfolds. The company’s Managing Director, Andre Booyzen, highlighted Tennessee Mountain as a key asset within AT4’s broader US-focused critical minerals strategy, aimed at supplying conflict-free tungsten and antimony to Western markets.

This exploration push follows a recent A$10 million placement at 12.5% discount that bolstered the company’s funding position and a strategic US Defense Consortium membership that opens doors to government programs supporting critical mineral development. These moves underpin AT4’s ambition to establish a vertically integrated supply chain based in Tier-1 US jurisdictions.

With no prior modern JORC-compliant drilling at Tennessee Mountain, the upcoming program represents a significant milestone. The historical Garnet Mine saw limited production and exploration dating back to the 1950s, but lacked systematic geochemical sampling or contemporary drill testing. The current program aims to fill this gap, providing clarity on the scale and grade continuity of the tungsten-molybdenum skarn system.