Maverick Springs Delivers 41m at 0.1% Antimony, Surpassing US Peers

Broad Antimony Zones Confirmed

Sun Silver Limited (ASX, SS1) has announced compelling new assay results from its Maverick Springs Silver-Gold Project in Nevada, USA, confirming broad zones of antimony mineralisation. The standout intercept includes 41 metres grading 0.1% antimony (Sb) from 240.2 metres depth, with higher-grade intervals reaching 0.2% Sb. These results come from a large-scale re-assay program targeting historic drill samples, which were originally assayed only for silver and gold.

Strategic Importance of Antimony

Antimony is a critical mineral with growing demand due to its essential role in defence, energy storage, and high-tech manufacturing. Sun Silver’s Managing Director, Andrew Dornan, emphasised the significance of Maverick Springs as a potential domestic US source of this strategic commodity, especially amid government efforts to secure critical mineral supply chains within national borders. The project’s antimony grades notably exceed those of Perpetua Resources Corp.’s Stibnite Project, a leading US antimony resource, which averages around 0.06%–0.07% Sb.

Building a Robust Dataset

The ongoing multi-element re-assay program involves reprocessing historic drill pulps, core, and rejects, with over 35 historic holes submitted for analysis. Early results have revealed mineralised zones with antimony concentrations frequently exceeding 500ppm and often reaching 1,000ppm (0.1% Sb). This growing dataset is critical for the imminent maiden antimony mineral resource estimate and mineralisation modelling, which will provide a clearer picture of the deposit’s scale and continuity.

Context of the Maverick Springs Project

Maverick Springs is a substantial silver-gold deposit with an inferred resource of 218 million tonnes grading 42.2 grams per tonne silver and 0.31 grams per tonne gold, equating to nearly 480 million ounces of silver equivalent. Located in Nevada’s highly regarded mining jurisdiction, the project benefits from proximity to world-class operations such as Barrick’s Carlin Mine. The deposit remains open along strike and at depth, with ongoing drilling and re-assays continuing to expand its known mineralisation footprint.

Next Steps and Market Implications

Sun Silver is advancing mineralisation modelling and expects further assay results through the third quarter of 2025. The company’s focus on unlocking the multi-commodity potential of Maverick Springs, particularly its critical antimony component, positions it well amid rising global demand for strategic minerals. Investors will be watching closely as the maiden antimony resource estimate takes shape, potentially adding a new dimension to the project’s value proposition.