Maverick Springs Delivers 59m at 0.1% Antimony Including 7.8% High-Grade Zone

Reassaying Historic Data Reveals High-Grade Antimony

Sun Silver Limited has delivered a compelling update from its Maverick Springs Silver-Gold Project in Nevada, revealing high-grade antimony mineralisation through a re-assay program of historic drill samples. The highlight is hole MR103, which returned a broad 59-metre zone averaging 0.1% antimony, including a remarkable 0.18 metres at 7.8% Sb. This result underscores the growing importance of antimony, a critical mineral, within the project’s existing silver-gold resource.

Critical Mineral Potential Surpasses Peers

Notably, the antimony grades at Maverick Springs compare favourably against Perpetua Resources Corp.’s Stibnite Project, which hosts average antimony grades of approximately 0.06% to 0.07%. Sun Silver’s ongoing re-assay program continues to identify zones with grades exceeding these benchmarks, suggesting Maverick Springs could emerge as a significant source of this strategic mineral alongside its precious metals.

Strategic Multi-Commodity Focus

The re-assay initiative is part of a broader strategy to unlock the full multi-commodity potential of the Maverick Springs Project. By revisiting historical drill core and pulp samples originally assayed only for silver and gold, Sun Silver is expanding its understanding of antimony distribution across the deposit. The project’s inferred mineral resource currently stands at 218 million tonnes grading 42.2 grams per tonne silver and 0.31 grams per tonne gold, equating to 296.5 million ounces of silver and 2.2 million ounces of gold.

Ongoing Exploration and Verification

While the standout 7.8% antimony assay is a highlight, Sun Silver cautions that some results from half-core samples carry minor uncertainties in depth and are not yet incorporated into resource estimates. The company is advancing quality assurance and control measures, including 3D spatial correlation of antimony intervals and twin drilling to verify historic data. Further assay results are anticipated throughout the third quarter of 2025, which will help refine the scale and consistency of antimony mineralisation.

Nevada’s Premier Mining Jurisdiction

Located 85 kilometres from Elko, Nevada, Maverick Springs benefits from proximity to world-class mining operations such as Barrick’s Carlin Mine and is situated in what the Fraser Institute rated as the world’s top mining jurisdiction in 2022. This strategic location, combined with the expanding critical mineral footprint, positions Sun Silver to capitalize on growing demand for antimony, used in flame retardants, batteries, and other industrial applications.