Sun Silver Unveils Extensive High-Grade Antimony at Maverick Springs

Antimony Emerges as a Critical Focus at Maverick Springs

Sun Silver Limited has announced compelling new results from its Maverick Springs Silver-Gold Project in Nevada, highlighting the presence of extensive antimony mineralisation within a historically silver and gold-dominant system. The re-assay of historical drill hole MR065 revealed a broad 66-metre interval averaging 0.12% antimony, including a high-grade 1.5-metre section at 1.74% Sb. This discovery underscores Maverick Springs’ potential as a significant U.S. source of this critical mineral, which is increasingly vital for emerging technologies and supply chain security.

Contextualising the Grades and Scale

Notably, the antimony grades reported at Maverick Springs are nearly double those of Perpetua Resources Corp.’s Stibnite Project, a leading U.S. antimony deposit with average grades around 0.06%–0.07% Sb. This comparison elevates the strategic importance of Sun Silver’s asset, especially as the company continues a large-scale multi-element re-assay program targeting historical drill core and pulps. These samples, originally assayed only for silver and gold, are now being tested for a broader suite of elements, revealing a more complex and valuable mineral system than previously understood.

Expanding the Multi-Commodity Potential

The Maverick Springs Project spans approximately 2.4 kilometres in length and 1.4 kilometres in width, hosting an inferred JORC Mineral Resource of 218 million tonnes grading 42.2 grams per tonne silver and 0.31 grams per tonne gold. The deposit remains open both along strike and at depth, with multiple mineralised intercepts outside the current resource model. The ongoing re-assay program aims to delineate the extent of antimony mineralisation within this broader silver-gold system, potentially unlocking additional value through a multi-commodity approach.

Robust Methodology and Future Outlook

Sun Silver’s approach includes re-assaying stored historic pulps with modern multi-element techniques at American Assay Laboratories, complemented by recent drilling and portable X-Ray Fluorescence analysis. While some intervals have missing pulps, the company is methodically cataloguing and testing approximately 30 historical holes, with another 25 pending assay results expected throughout the third quarter of 2025. This systematic work is enhancing geological understanding and refining the potential scale of antimony distribution across the project.

Strategic Location and Jurisdictional Advantage

Located 85 kilometres from Elko, Nevada, and surrounded by world-class mining operations including Barrick’s Carlin Mine, Maverick Springs benefits from a premier mining jurisdiction rated number one globally by the Fraser Institute in 2022. This proximity to established infrastructure and mining expertise further supports the project’s development potential.