Diablo Resources Confirms High-Grade Silver-Antimony-Copper at Star Range

High-Grade Silver and Antimony Confirmed at South Star

Diablo Resources Limited (ASX:DBO) has revealed further high-grade assay results from its Star Range Project in southwestern Utah, confirming silver grades as high as 534 g/t and antimony up to 0.19% at the South Star Prospect. These rock samples, collected from newly identified workings, extend the known mineralised trends and reinforce the presence of a robust silver-antimony-copper system.

The South Star soil anomaly now stretches over 1,000 metres and remains open to the northeast, with historical data suggesting the trend extends beyond 2,500 metres. The mineralisation is characterised by a zonation pattern, with copper-silver skarn mineralisation proximal to intrusive contacts transitioning outward to silver-antimony-gold zones. This spatial relationship supports Diablo’s exploration model and highlights the prospectivity of the area.

New Gold Targets Emerge on Utah TLA Lease

Expanding its project footprint, Diablo has reported encouraging gold values up to 1.04 g/t Au from outcropping quartz breccia within the recently acquired Utah TLA lease. This new zone, marked by highly altered and brecciated sedimentary rocks over a 300-metre strike, presents a fresh target for follow-up exploration. Several additional samples exceeding 0.1 g/t gold validate the continuity of anomalism, positioning this area as a priority for further mapping and soil sampling.

Copper Anomaly Identified at North Star Prospect Extension

Reconnaissance sampling along the northeastern extension of the North Star Prospect has delineated a coherent copper-in-soil anomaly, with rock samples returning up to 1.0% copper and 0.11 g/t gold. This 1-kilometre prospective corridor aligns with a magnetic structural feature and confirms the presence of mineralised intrusives beyond the main North Star trend.

Previously, the North Star Prospect has yielded peak results of over 3,000 g/t silver, 0.7% antimony, 9.3 g/t gold, and 2.6% copper, underscoring its status as a compelling drill target. The company is currently finalising permitting and logistics for its maiden drill program at North Star, which is set to commence in the current quarter.

Strategic Progress Toward Maiden Drilling

Diablo’s CEO Lyle Thorne emphasised the convergence of multiple datasets reinforcing the scale and quality of the mineralised system, stating that the results “continue to strengthen the Company’s exploration model and reinforce our belief that the Star Range district is highly prospective.”

The company has lodged permitting submissions and is advancing logistical preparations for its maiden drilling campaign, scheduled for Q2 2026. This follows a recent phase of detailed geophysical and mapping work, which has helped define high-priority drill targets at the project’s North Star Prospect, as outlined in the company’s earlier update on high-priority drill targets.

Project Location and Geological Setting

The Star Range Project covers approximately 21.6 square kilometres in Beaver County, Utah, near the town of Milford. It lies adjacent to historically significant mining sites, including the Horn Silver Mine, which produced 17 million ounces of silver until 1930, and active open pit copper deposits mined nearby.

The project’s geology features structurally controlled Basin and Range-style mountain ranges with Paleozoic sediments intruded by granitic rocks. Mineralisation occurs as manto-replacement and breccia vein systems along sediment contacts, consistent with skarn and Carlin-style deposits.