Volta’s drill hole SL25-25 returned 0.40% TREO and 44.5 g/t Ga2O3 over 417.8 m including 174.7 g/t Gallium Oxide, 3.73% TREO and 5,146 g/t Neodymium Oxide over 2.2 m
Press Release
HIGHLIGHTS
⦁ Drill holes SL25-25 and SL26-27 confirm strong continuity of the Springer gallium and rare earth element (Ga-REE) carbonatite system and successfully extend mineralization to the south.
⦁ SL25-25 returned 0.40% TREO and 44.5 g/t Ga2O3 over 417.8 m, from 5.2 m to 423.0 m, including a high-grade interval of 174.7 g/t Ga2O3 and 3.73% TREO over 2.2 m, from 88.2 m to 90.4 m.
⦁ The high-grade interval in SL25-25 demonstrates strong enrichment in critical magnet rare earths, including:
o Neodymium up to 5,145.9 g/t Nd2O3 and Praseodymium up to 1,701.3 g/t Pr6O11. o Dysprosium up to 66.9 g/t Dy2O3 and Terbium up to 19.1 g/t Tb4O7.
o Gadolinium up to 247.2 g/t Gd2O3 and Samarium up to 467.6 g/t Sm2O3.
⦁ Hole SL26-27 intersected 0.36% TREO and 45.8 g/t Ga2O3 over 264.0 m, from 129.0 m to 393.0 m, extending mineralization to the south, including a higher-grade intersection of:
o 0.61% TREO and 55.4 g/t Ga2O3 over 22.5 m.
Volta Metals Ltd. (CSE: VLTA) (FSE: D0W) (OTCQB: VOLMF) (“Volta” or the “Company”) is pleased to report assay results from drill holes SL25-25 and SL26-27, completed as part of the 2026 winter drill program at its Springer Rare Earth Element deposit (the “Property”), near Sturgeon Falls, Ontario, Canada.
From January to April 2026, Volta completed a 13-hole, 5,452-metre (“m”) drill program (SL26-27 to SL26-39) at the Springer deposit. The program was designed to both upgrade the current mineral resource estimate (“MRE”) through infill drilling and expand the known Ga-REE mineralization.
DETAILS
Drill hole SL25-25 intersected 417.8 m grading 0.40% Total Rare Earth Oxides (“TREO”) and 44.5 g/t gallium oxide (“Ga₂O₃”) from 5.2 m to 423.0 m, including a high-grade interval of 3.73% TREO and 174.7 g/t Ga₂O₃ over 2.2 m. The hole also returned a higher-grade near-surface zone grading 0.62% TREO and 60.6 g/t Ga₂O₃ over 50.0 m. These results further demonstrate the scale of the Springer system while continuing to expand Volta’s growing inventory of gallium, a strategically important critical mineral with highly concentrated global supply.
Drill hole SL25-25 was completed at a subvertical angle (80°) to the base of the conceptual open pit to test the down-dip extension of the Springer mineralized system. The hole successfully extended known mineralization approximately 220 m below historical hole SL12-20. Drill hole SL26-27 was designed to test the southern extent of the deposit and successfully intersected broad intervals of gallium and rare earth mineralization, confirming the continuation of the system in that direction.
Following the release of REE assay results on December 11, 2025, drill core from the 2025 Springer program was subsequently re-assayed for gallium. For completeness, both gallium and REE assay results for drill hole SL25-25 are presented in this release. Drill hole SL26-27 was completed as part of Volta’s 2026 winter drill program, and its results have not been previously disclosed.
“Drill hole SL25-25 returned more than 400 m of continuous gallium and rare earth mineralization, including a high-grade core enriched in premium magnet rare earths, while hole SL26-27 confirms the mineralization continues to the south,” said Kerem Usenmez, President and CEO of Volta. “The consistency, scale and growing footprint of the Springer deposit continue to exceed our expectations. As governments and industry seek secure North American supplies of critical minerals, Springer is rapidly demonstrating the characteristics of a strategically important gallium and rare earth project.”
Assay highlights from drill holes SL25-25 and SL26-27 are given in Table 1, and the best interval for individual REEs is given in Table 2. Assays are pending for additional drill holes. Drill hole collar coordinates are given in Table 3.
Springer REE assay results from drill holes SL25-23, SL25-24 and SL25-26 were reported in previous press releases (see Volta press releases dated October 29, 2025, November 12, 2025, and December 11, 2025, for details).
The REEs, along with a portion of the gallium, are primarily hosted in synchysite, a well-recognized REE calcium-cerium fluorocarbonate mineral. Synchysite concentrates light rare earth elements, including cerium (Ce), lanthanum (La), neodymium (Nd), and praseodymium (Pr), as well as heavy rare earth elements like dysprosium (Dy) and terbium (Tb), as well as gallium (Ga). The identification of synchysite as the principal host mineral is significant, as it is amenable to well-established REE recovery processes.
IBF4
