DIABLO RESOURCES (ASX:DBO) STAR RANGE EARTHWORKS COMPLETE; HORN SILVER EXPLORATION UNDERWAY

Jane Morgan Management

Diablo Resources Ltd (ASX: DBO) is pleased to provide an update on ongoing exploration activities across its Utah critical minerals projects, with earthworks now completed at the Star Range Project ahead of drilling and exploration underway at the recently acquired Horn Silver Project.

Star Range Project, Utah

Earthworks have been completed at the North Star Prospect, establishing vehicular access to priority drill sites and laydown and geological logging areas to enable mobilisation for the upcoming diamond drill program.

The completed pads and access routes provide the required operational footprint for drilling activities under the approved drilling permit, with no further civil works anticipated ahead of program commencement.

The initial drill program will comprise five diamond drill holes for approximately 1,000 metres of drilling. The holes are designed to evaluate the subsurface scale, continuity and geometry of the mineralised breccia-vein system at depth, where surface sampling has returned high-grade silver and antimony results including:

• 3,043 g/t silver (Ag) (97.8 oz/t) and 1.37 g/t gold (Au)
• 1,592 g/t Ag (51.2 oz/t) and 0.7% antimony (Sb)
• 2,311 g/t Ag (74.3 oz/t) and 0.4% Sb
• 1,243 g/t Ag (40 oz/t) and 0.2% Sb

Regional exploration is continuing in parallel, with field teams undertaking systematic geological mapping, soil sampling and rock-chip collection across broader structural trends. This work is refining the distribution of mineralised zones, improving geological understanding and feeding directly into ongoing target ranking for subsequent phases of drilling.

Horn Silver Project, Utah

Diablo has acquired an 80% interest in 101 unpatented lode claims and holds an exclusive option to acquire 101 patented claims forming the Horn Silver tenure package.

This enables the Company to advance early-stage fieldwork within the unpatented claims while progressing the option exercise on the patented claims, which remains on schedule for completion in September.

The Project hosts multiple historical workings, including the Horn Silver Mine, where approximately 17 million ounces of silver at an average grade of 604 g/t from approximately 1Mt were extracted between the late 1800s and the 1950s, highlighting the long-recognised high-grade nature of the system.

Reconnaissance work has commenced across the unpatented claims, with field teams undertaking geological mapping, regional sampling and validation of historical workings.

This initial exploration phase is designed to refine structural interpretations, confirm the distribution of mineralised zones and support systematic target ranking. Early observations continue to reinforce the presence of widespread polymetallic Ag-Sb-Cu-Au mineralisation across multiple structural corridors, consistent with a district-scale carbonate-replacement system.

In parallel, the Company is continuing to review the extensive historical datasets to rank both near-mine extensions and regional prospects for the planned upcoming maiden drill program.

Priority targets include depth and strike extensions to the historic high-grade Horn Silver Mine, as well as several high-potential regional anomalies and historic workings, notably the Gossan Target, Drum Mine and Buckhorn Mine.

These targets represent walk-up opportunities supported by geophysics, historical workings and modern sampling, forming the foundation of the Company’s initial drilling strategy at Horn Silver.

CEO Lyle Thorne commented:

Next Steps

Star Range

• Commence drilling at North Star, designed to provide the first subsurface geological information below high-grade silver rock samples and geophysical anomalies.
• Continue reconnaissance and data compilation across regional targets including South Star, East Star and the encouraging gold anomalism within the Utah Trust Lands Administration lease.

Horn Silver Project

• Complete exercise of the option for the 101 patented claims.
• Continue regional exploration within the unpatented claim package.
• Progress towards finalising the maiden drill program through ongoing refinement and integration of all geological, geochemical and historical datasets.

Jane Morgan

E:[email protected]‭

T: +61 405 555 618‬

Lyle Thorne
Chief Executive Officer
Diablo Resources Ltd
E: [email protected]
T: +61 (8) 6383 7837
W: diabloresources.com.au