American Tungsten Corp. is advancing its IMA mine project, a past-producing underground tungsten operation in Idaho, with a drilling program structured around three measurable objectives: resource conversion, resource expansion, and engineering inputs for a Preliminary Economic Assessment expected before year-end.
The most concrete data point from recent work is the identification of the 360 portal vein, intersected in surface holes drilled at the base of the canyon. The vein is a moderately northeast-dipping hubnerite-tetrahedrite mineralized quartz structure, historically mined near-surface, and drilling has now traced it over 200 feet at depth and along strike. It aligns with historically reported vein occurrences on the south side of the canyon, and it remains open both down-dip and along strike. Tungsten-silver mineralization over meaningful widths makes this a legitimate additional target rather than a marginal intercept, though the market should wait for assay continuity and density data before weighting it heavily in any valuation.
Following the recent Mineral Resource Estimate, the company has shifted from step-out exploration to infill and conversion drilling aimed at moving inferred ounces into measured and indicated categories. This is a rational sequencing decision. Conversion drilling reduces geological uncertainty within known zones, which directly improves the reliability of the PEA’s inputs — mineable shape, dilution assumptions, and grade distribution — and typically compresses the discount a market applies to resource-stage projects.
The operational footprint supports this transition. In August and September, the company completed roughly 9,300 feet of drilling across six surface holes and thirteen underground holes, with underground work conducted from newly developed footwall crosscuts on the D level, extended 300 feet northeast of prior drill stations. The next phase targets the down-dip extension of the No. 3-5-7-9 vein system: a 230-foot crosscut into the hanging wall of the 9 vein is complete, and a second station is being developed from the 7 vein drift. Approximately 24 holes totaling 12,000 feet are planned from these stations, testing where the principal veins extend from the IMA onto the Mazda claim group.
For investors, the relevant considerations are straightforward. First, the company is executing a defined work program against stated milestones, which allows objective tracking — PEA delivery by year-end is the primary verifiable checkpoint. Second, tungsten’s supply concentration outside North America gives domestic projects a strategic premium, but that premium only translates into economics if the PEA demonstrates viable grades, recoveries, and processing routes. Third, new discoveries like the 360 portal vein add optionality, but inferred-to-measured conversion is the metric that actually de-risks the asset in bankable terms. Judge the project on conversion rates and PEA economics, not on exploration headlines.
Source: https://www.e-mj.com/breaking-news/american-tungsten-advances-ima-mine-project/
