Spartan Metals Geophysical Surveys Indicate Potential Tungsten-Silver Veins Extension at Its Tungstonia Claims, Nevada

Indicates Approximately 700 Meters of depth potential to veins Surveys also identify a related 3.7 km² potential porphyry target Tungstonia appears to host a dynamic mineralizing system with potential for multiple styles of mineral deposits Vancouver, British Columbia--(Newsfile Corp. - September 18, 2026) - Spartan Metals Corp. (" Spartan " or the " Company "), an exploration and development company focused on tungsten and critical minerals in the western United States, announces the results of the magnetotelluric (" MT ") and direct-current induced polarization (" DCIP ") geophysical surveys completed at the Tungstonia Claims on its 100% owned Eagle Tungsten-Silver-Rubidium Project (" Eagle " or the " Project ") in White Pine County, Nevada. The surveys deliver Spartan's first three-dimensional dataset beneath its Tungstonia Claims. The data set agrees well with mapped structures, geology, surface geochemistry and with the projected geological model at depth providing a coherent picture which has produced new and exiting targets for the Eagle Project. Based on our interpretation of the geophysical anomalies, the veins worked almost a century ago are projected to continue to depths of up to approximately 700 meters (m) that could potentially be connected to a larger intrusion related target beneath. Together the two are interpreted as different parts of one larger mineralizing system, linked by the structures the veins occupy. "These surveys have given us our first look beneath the legacy workings at Tungstonia and across the Tungstonia Claims. We are very pleased at how well the results line up with the geological model our team built from surficial data," said Rebecca Ball, Spartan's Vice President of Exploration. "We are excited that we can see anomalies that coincide with our surface veins apparently continuing to depth and that we have also identified an intrusive target that may be the source of the fluids that formed them. We believe we have a coherent picture of one potentially large mineralizing system with several strong targets across the Eagle Project that we can drill with clear rationale behind each one." Highlights Tungsten-silver veins imaged to depths of up to approximately 700 meters. DC resistivity resolves Veins 1 through 5 and their greisen alteration envelopes below surface, carrying the same strike and dip at depth that Spartan has mapped at surface (Figures 1 and 2). A 3.7 km² porphyry target defined between approximately 400 m and 1,800 m depth. Identified by MT along the 0500N line within carbonate-dominated sedimentary units adjacent to the interpreted NNE Sims Canyon Fault (Figure 3) – a target style not previously identified at Tungstonia. The veins and the porphyry target are interpreted as parts of one larger system. The veins occupy pre-existing structures that project downward toward the interpreted intrusive body, consistent with those structures having acted as feeders carrying tungsten-bearing fluids upward into the Tungstonia vein system. Distinct CRD potential where the same fluids meet limestone. A potential carbonate replacement ("CRD") style target on the western side of DCIP Line 1570N sits where interpreted fluid pathways contact the prospective Guilmette Limestone which is a different another style of mineralization expected on the flanks of the same system (Figure 4). A potential tungsten skarn target was defined on the eastern side of DCIP Line 0500N (Figure 5). Soil and rock chip samples collected in the area support a CRD system developing on the flank of the intrusion. Five priority targets now ready to rank for drilling. The strongest DCIP anomalies overlap known tungsten mineralization, quartz-vein development and legacy workings – the geophysics is responding where Spartan's geologists expected it to. What These Results Mean How the surveys work. Both surveys map electrical properties of rock...