Spartan Metals Discovers Potential Vein Extensions and Porphyry Target at Tungstonia Claims

Spartan Metals Corp., an exploration and development company focused on tungsten and critical minerals in the western United States, has announced the results of geophysical surveys completed at the Tungstonia Claims on its 100% owned Eagle Tungsten-Silver-Rubidium Project in White Pine County, Nevada. The surveys, which include magnetotelluric (MT) and direct-current induced polarization (DCIP) methods, have provided Spartan's first three-dimensional dataset beneath its Tungstonia Claims, revealing new and exciting targets for the Eagle Project.

The surveys indicate approximately 700 meters of depth potential to the veins worked almost a century ago, suggesting that these veins could continue to depths significantly greater than those previously mined. Additionally, the surveys have identified a related 3.7 km² potential porphyry target between approximately 400 meters and 1,800 meters depth. This target was defined by MT along the 0500N line within carbonate-dominated sedimentary units adjacent to the interpreted NNE Sims Canyon Fault.

According to Rebecca Ball, Spartan's Vice President of Exploration, "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. 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."

The Eagle Project, which covers 9,033 acres consisting of 445 Bureau of Land Management (BLM) unpatented lode mining claims, is a district-scale exploration opportunity containing three past-producing tungsten mines (Tungstonia, Yellow Jacket, and Rees/Antelope) with reported historic production grades of 0.6-3.51% WO3. Operations at these mines were from 1915 to 1942, with intermittent small-scale production occurring until 1956. Tungsten production from these mines totaled 8,379 short ton units at grades between 0.6%-0.9% WO3.

The surveys have also identified distinct carbonate replacement (CRD) potential where the same fluids meet limestone. A potential 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 style of mineralization expected on the flanks of the same system. A potential tungsten skarn target was defined on the eastern side of DCIP Line 0500N.

Spartan interprets all of these features to be related. Quartz-huebnerite veins with greisen envelopes are characteristically sourced from evolved granitic intrusions, and the structures hosting Veins 1-5 are pre-existing faults and fractures that project downward toward the interpreted porphyry body. Spartan interprets these structures to have acted as feeder conduits, channeling tungsten-bearing fluids upward from the intrusive source into the trap sites now expressed as the Tungstonia vein system.

The MT resistivity model has identified a potential porphyry target along the 0500N MT Line extending from approximately 400 meters to 1,800 meters depth and covering an interpreted area of approximately 3.7 km², within carbonate-dominated sedimentary units along the interpreted NNE Sims Canyon Fault. The DCIP survey, which maps resistivity together with chargeability, appears to resolve the quartz-huebnerite Veins 1 through 5 and their greisen envelopes to depths of up to approximately 700 meters, following the same strike and dip mapped at surface.

Spartan is integrating the MT and DCIP inversions with its geological database to complete an updated 3D model of the Tungstonia system, prioritizing areas where known mineralization, legacy workings, quartz-vein and greisen development, interpreted intrusive contacts, and geophysical anomalies coincide. Targets with several coincident characteristics will receive the highest priority for drill testing.