Diablo Resources (ASX:DBO) advances maiden drilling at Utah's North Star Prospect

Diablo Resources has received final drill permit documentation for its maiden diamond drilling program at the North Star Prospect within the Star Range Project in southwestern Utah, USA.

Receipt of the final drill permit documentation clears the way for mobilisation and drilling to commence in the coming weeks, marking the first-ever drill testing of the high-priority North Star Prospect.

The initial campaign will test multiple Ag-Sb-Cu-Au targets defined through the integration of surface geochemistry, geological mapping and induced polarisation geophysics.

Highlights

The maiden drill program at the North Star Prospect has been designed to test a series of high-priority silver-antimony targets defined through the integration of surface geochemistry, detailed geological mapping and recent induced polarisation geophysics.

The planned drilling will target multiple mineralised breccia vein trends extending beneath areas where surface sampling has returned high-grade silver of up to 3,043g/t Ag and antimony of up to 0.7% Sb in areas that have never been drill tested.

The company stated that the program will test induced polarisation anomalies coincident with mapped structures and associated with high-grade surface mineralisation, evaluate the scale, continuity and geometry of the mineralised breccia vein system at depth, provide the first subsurface data to refine its structural, geological and geochemical model across the broader North Star trend, and assess the potential for a significant silver-mineralised system beneath historical workings and subsurface geochemical anomalies.

Diablo Resources CEO, Lyle Thorne, commented:

“Receiving final drill approval marks a major milestone for Diablo and allows us to commence the first ever drill testing at our exciting Star Range Critical Minerals Project. This program will provide the first opportunity to test the geological model we have built through the integration of high-grade surface geochemistry, geological mapping and geophysical datasets.

Importantly, with drilling to commence at Star Range and the acquisition of the Horn Silver Project progressing towards completion, Diablo is rapidly building a portfolio of highly prospective silver, antimony and copper projects in one of the United States’ premier critical minerals districts.

Together, these projects provide near-term drilling and exploration catalysts and position the Company to play a meaningful role in supporting the United States’ strategy to strengthen domestic supply of silver, antimony and copper.”

The initial drilling campaign comprises approximately 5 diamond drill holes for approximately 1,000m.

The approved permit provides for up to 27 holes from 12 drill pads, allowing Diablo to rapidly follow up successful intersections and accelerate exploration across the North Star Prospect.

The company stated that results from the initial campaign will guide follow up drilling and ongoing target generation across the project.

Alongside preparations for drilling at the North Star Prospect, Diablo has completed regional geochemical sampling across the South Star and East Star prospects, with the program designed to expand the company's pipeline of drill targets beyond North Star.

Diablo stated that earlier first pass soil sampling at the South Star Prospect identified a significant silver-antimony anomaly extending 1,000m in length and remaining open towards the northeast.

The anomaly occurs parallel to the intrusive contact and supports the company's interpretation of a large, zoned mineral system transitioning from copper-silver skarn mineralisation adjacent to the intrusive contact to distal silver-antimony-gold mineralised zones over several hundred metres.

Company mapping within the soil anomaly located several old workings containing silica carbonate veins and breccia zones with grades of up to 231g/t Ag and 0.1% Sb, while historical soil results increase the overall length of the prospective trend to more than 2,500m.

The recently completed sampling program focused on extending the South Star anomaly further to the north and northeast, while the initial geochemical program at the East Star Prospect is targeting definition of mapped copper skarn mineralised zones.

Pending assay results from both programs are expected to aid ongoing target generation and drill prioritisation across the broader Star Range Project.

The Star Range Project is located approximately 6km west of Milford in Beaver County, Utah, and comprises 238 lode claims and 1 Utah TLA lease covering approximately 5,242 acres.

The project is located approximately 15km from the historical Horn Silver Mine, which produced 17M ounces of silver, 25,000 ounces of gold and 9M pounds of copper from a single 20-acre patented claim between 1875 and 1952.

Diablo also noted that shareholders approved the acquisition of an 80% interest in Antler Resources LLC at the General Meeting held on 29 June 2026.

This approval clears the way for completion of the Horn Silver Project acquisition under the binding agreement.

The company's stated next steps are to commence the maiden diamond drill program at the North Star Prospect following mobilisation and site preparations, receive and interpret assay results from the South Star and East Star geochemical programs, and complete the acquisition of an 80% interest in the Horn Silver Project.

Diablo also plans to continue geological mapping, target generation and drill prioritisation across the Horn Silver Project.

The company intends to advance systematic exploration across both the Star Range and Horn Silver projects, building a pipeline of high-priority silver, antimony and copper drill targets.