American Tungsten defines resource at IMA Mine, Wyoming
Patterson, Idaho and Toronto, Ontario--(Newsfile Corp. - August 20, 2026) - American Tungsten Corp. (TSXV: TUNG) (OTCQX: TUNGF) (FSE: RK90) ("American Tungsten" or the "Company") is pleased to announce a Mineral Resource Estimate ("MRE") for the Company's IMA Mine ("IMA") in Lemhi County, Idaho, U.S. The MRE has an effective date of July 15, 2026 and was prepared by Minetech, LLC, in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects("NI 43-101") and the CIM Definition Standards. A supporting NI 43-101 Technical Report will be filed on SEDAR+ under the Company's issuer profile within 45 days of this news release.
Mineral Resource Estimate Highlights
316,000 tonnes of Indicated Mineral Resources grading 0.55% WO₃, containing 1,747 tonnes of WO₃ and 404,000 oz of silver;
2,178,000 tonnes of Inferred Mineral Resources grading 0.55% WO₃, containing 11,933 tonnes of WO₃ and 1,848,000 oz of silver;
An additional 267,000 tonnes of Indicated Mineral Resources grading 0.15% WO₃, containing 413 tonnes of WO₃ and 79,000 oz of silver are contained in the surface tailings from previous mining on fee simple land controlled by American Tungsten;
The underground tungsten vein system is reported at a cut-off grade of 0.20% WO₃ based on a price of $1,300/MTU WO 3 ;
Mineralization remains open for expansion within the known vein systems, supporting further resource growth potential through ongoing surface and underground drilling; and
The MRE provides the technical foundation for advancing future resource and economic studies, including a Preliminary Economic Assessment ("PEA").
Consolidated Mineral Resources
Table 1: Consolidated Mineral Resources for IMA Tungsten Vein System and Historical Tailings
The effective date of the IMA Tungsten Mineral Resource Statement is 15 July 2026.