Western Star Models Buried Intrusive Bodies and Fluid Conduits Across Its Nevada Tungsten District

Western Star Resources Inc. (CSE: WSR) (OTC: WSRIF) (FRA: 4K2) has announced 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 interpreted to channel mineralising fluid 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, 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, stated: "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 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 district-scale magnetic inversion, completed by Warren Hughes, P.Geo., of East Coast Consulting, defines buried and partially exposed intrusive bodies across the district. A causative intrusion is the essential ingredient of a tungsten skarn system, and the modelled intrusive framework extends 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. These are interpreted as fluid conduits that fed the skarn and represent the first structural framework mapped at property scale in this 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.

Tungsten skarns form where a granitic intrusion is emplaced into a carbonate sequence. As the intrusion cools, it expels metal-bearing hydrothermal fluid, which reacts with surrounding limestone to produce garnet-rich calc-silicate rock known as skarn or tactite, within which scheelite, the principal tungsten mineral, is deposited. Three elements must therefore be present together: an intrusion to drive the system, reactive carbonate rock to host the replacement, and structures to focus the fluid. The deposit model set out in the U.S. Geological Survey assessment of tungsten skarn resources across the Great Basin (Lederer and others, 2021) shows this arrangement clearly. Skarn develops both at depth along the flanks of the intrusion and at shallower levels where fluid has migrated out along faults and permeable horizons.

The most important outcome of the inversion is the relationship it reveals between the modelled intrusive rocks and the company's existing rock-chip results. At Rowland, the sample that returned 4.02% WO3 sits directly on the mapped tactite where it abuts the modelled intrusive body. At White Star, the sample that returned 3.00% WO3 occupies the same position on the same contact on a separate intrusive body. Both are within, or immediately adjacent to, interpreted structural corridors. The modelled intrusive extends considerably beyond the mapped outcrop, so search space is now materially larger than the mapped geology alone would suggest.

Western Star is also pleased to announce that it has satisfied the first performance milestone under the option agreement for the Rowland tungsten project (see news release dated November 5, 2025). Under the agreement with NorthEx Capital Partners Inc. and 1249445 BC Ltd., Milestone One required the company to (i) increase the total project claim area by at least 30%, and (ii) identify at least three rock-chip samples grading above 2.0% WO3. Both conditions have been met well beyond the required thresholds. The company expanded the Rowland claim package from the original ten unpatented claims (approximately 84 hectares) to its current 221-hectare footprint—an increase of approximately 165%. Rock-chip sampling reported in the company's news release of July 28, 2026 returned four Rowland samples grading above 2.0% WO3: 4.02% (RO-16-01), 2.69% (RO-19-15), 2.56% (RO-19-10), and 2.11% WO3 (RO-16-02). 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, subject to the policies of the Canadian Securities Exchange.

The scientific and technical information contained 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. Mr. Mowatt is not independent of the company. The UAV magnetic survey was by AJ Mining LLC using a DJI Matrice M300 platform carrying a GSMP-35U v8.0 potassium vapour magnetometer at a nominal sensor height of 70 metres with terrain following. Flight lines were oriented east–west at spacings of 25 to 100 metres, varied according to topography and target density, with tie lines at 400 metres. Approximately 110 line-kilometres were processed over approximately 3,000 acres. Data were quality-checked in the field and corrected against base-station readings, with diurnal, lag and heading corrections applied. Processing, levelling, gridding, three-dimensional inversion and interpretation were completed by Warren Hughes, P.Geo., of East Coast Consulting using Geosoft Oasis Montaj, with inversion performed using the MAG3D algorithm on a 50-metre cell following removal of the regional field. Rock-chip and channel assay results referred to in this news release were previously reported by the company in July 2026. All coordinates are reported in the NAD83 UTM Zone 11N coordinate system. Magnetic susceptibility is a physical rock property and is not a direct measurement of mineralisation; the interpretations described in this news release require confirmation by drilling.

References: Coats, R.R., 1964. Geology of the Jarbidge quadrangle, Nevada–Idaho. U.S. Geological Survey Bulletin 1141-M, Plate 1, scale 1:62,500. Lederer, G.W., Solano, F., Coyan, J.A., Denton, K.M., Watts, K.E., Mercer, C.N., Bickerstaff, D.P. and Granitto, M., 2021. Tungsten skarn mineral resource assessment of the Great Basin region of western Nevada and eastern California. Journal of Geochemical Exploration, doi:10.1016/j.gexplo.2020.106712.