Western Star Resources Inc. (CSE: WSR) (OTC: WSRIF) (FRA: 4K2) has released the results of a district-scale three-dimensional geophysical inversion across its Rowland and White Star tungsten properties in Elko County, Nevada. The modelling has defined buried and partially exposed intrusive bodies and refined the fault network believed to channel mineralising fluids into the tungsten skarn system. Importantly, the company's highest-grade rock chips—4.02% WO3 at Rowland and 3.00% WO3 at White Star (as reported on July 28, 2026)—both correspond spatially with the contact between these modelled intrusive rocks and the carbonate host. The modelled intrusive framework extends well beyond the limits of mapped outcrop, opening substantial new search space across both properties.
Blake Morgan, CEO and President of Western Star, commented: “This is the result we were hoping for. The inversion has modelled intrusive bodies spatially associated with areas where we sampled high grade tungsten values, and it has mapped the faults that we believe carried the fluid there. That is the tungsten skarn recipe, and we can now see it in three dimensions across the whole district. Better still, the modelled intrusives are more extensive than has been previously mapped, which means the ground that has produced our best rock chips continues into untested areas. Soil geochemistry from Phase 2 is due back shortly and we can use these in our drill hole planning.”
The inversion was completed by Warren Hughes, P.Geo., of East Coast Consulting, a specialist in geophysical modelling. The modelling defines buried and partially exposed intrusive bodies across the district, with the interpreted intrusive framework extending well beyond the mapped outcrop. Approximately 25 kilometres of structure has been interpreted in two dominant orientations—north-east–south-west and north-west–south-east—which are interpreted as the fluid conduits that fed the skarn. This represents the first structural framework mapped at property scale in the district.
The modelled magnetic domains correspond closely with the units mapped by Coats (1964), adding depth and continuity to that mapping. The inversion also resolves geology beneath the extensive Quaternary cover on the eastern flank of the district, providing an exploration vector into ground that cannot be mapped or sampled at surface. Soil geochemistry from the Phase 2 programme is expected shortly and will be integrated with the inversion model, structural framework, and geological mapping to define and rank drill targets.
The tungsten skarn model, as set out in the U.S. Geological Survey assessment of tungsten skarn resources across the Great Basin (Lederer and others, 2021), shows that skarn develops where a granitic intrusion is emplaced into a carbonate sequence. As the intrusion cools, it expels metal-bearing hydrothermal fluid, which reacts with limestone to produce skarn, where scheelite is deposited. Three elements must be present: an intrusion to drive the system, reactive carbonate rock to host the replacement, and structures to focus the fluid. The inversion has identified all three elements in the district, and the highest-grade samples are located on the modelled intrusive contact.
Western Star also announced that it has satisfied the first performance milestone under the option agreement for the Rowland tungsten project. The milestone required increasing the total project claim area by at least 30% and identifying at least three rock-chip samples grading above 2.0% WO3. The company expanded the Rowland claim package from 84 hectares to 221 hectares, a 165% increase, and rock-chip sampling returned four samples grading above 2.0% WO3, well exceeding the requirements. The company will issue 500,000 common shares to the vendors, valued at the 10-day volume-weighted average price immediately preceding the verification date.
The scientific and technical information in this news release has been reviewed and approved by Jasper Mowatt, MIMMM, MAusIMM, a consultant to the company and a Qualified Person as defined by National Instrument 43-101. The UAV magnetic survey was conducted by AJ Mining LLC using a DJI Matrice M300 platform with a GSMP-35U v8.0 potassium vapour magnetometer. Processing, levelling, gridding, three-dimensional inversion, and interpretation were completed by Warren Hughes using Geosoft Oasis Montaj and the MAG3D algorithm.
References include Coats (1964) and Lederer and others (2021), which provide the geological context and deposit model. The company's forward-looking statements are subject to risks and uncertainties, and there is no assurance that proposed exploration programs will proceed as anticipated or that exploration will result in the discovery of a mineral resource.
