Diablo Resources (ASX:DBO) confirms copper mineralisation open in all directions at Phoenix Project

Early drilling success has provided Diablo Resources (ASX:DBO) with its first substantial evidence of copper mineralisation at the Phoenix Copper Project in Utah, USA, positioning the company for a critical next phase of exploration in a globally recognised copper district.

Highlights

• Maiden scout drilling returned 10.5 metres at 1.02% copper, including 1.5 metres at 3.99% copper, from 36.5 metres in hole PHIL25-10.

• The discovery confirms open mineralisation in all directions and at depth at the Philadelphia Prospect.

• Follow-up drilling is scheduled to commence in mid-November, including the first drill program at the nearby Fair Dinkum prospect.

• The Phoenix Project lies along strike from the 740-million-pound Lisbon Valley Copper Mine, within Utah’s Tier-1 Lisbon Valley Mining District.

The maiden reverse-circulation drilling campaign at Phoenix marks a significant step forward for Diablo’s exploration in the Lisbon Valley region.

he program tested two priority areas, Philadelphia and Trenton, returning promising results from the former and valuable geological data from the latter.

The Philadelphia Prospect, centred over the historical Philadelphia Copper Mine, has demonstrated the kind of near-surface oxide copper mineralisation that often provides the foundation for larger discoveries.

Hole PHIL25-10, completed at the northeastern extent of the program, intersected a 19-metre-wide zone of fractured and altered sediments associated with the Philadelphia Fault.

The mineralised zone comprises fracture-fill and disseminated copper oxides such as malachite and azurite hosted within altered sandstones and limestones of the Hermosa Group.

Earlier surface sampling across 750 metres of strike returned assays up to 45.7% copper, further validating the fault-controlled nature of the mineralisation and the scale potential of the system.

At the Trenton Prospect, located along the regionally significant East Bounding Fault, three reconnaissance holes were drilled over a kilometre of strike, and while no significant mineralisation was identified, anomalous copper, arsenic, zinc and cobalt were detected, providing valuable data to refine geological interpretation and guide future targeting.

Chief Executive Officer Lyle Thorne said the initial results support a strong geological model and provide a clear direction for upcoming drilling.

“Our maiden scout drill program at Phoenix has returned some exciting results at Philadelphia, intersecting a shallow mineralised copper zone in the northernmost hole that is open in all directions and at depth,” he said. “Follow-up drilling is scheduled to commence in mid-November and will include our maiden drill program at the high-priority Fair Dinkum prospect, located directly along strike from known copper deposits in the Lisbon Valley.”

The Phoenix Project comprises two main claim blocks, CC and Stateline, totalling 315 unpatented lode claims covering approximately 6,300 acres of federal land administered by the U.S. Bureau of Land Management.

The project’s location within the same structural corridor as the Lisbon Valley Copper Mine offers a clear geological advantage, as mineralisation in the district typically occurs in sediment-hosted systems associated with major faults and fractures.

In parallel with its copper focus, Diablo Resources is advancing exploration at its Star Range Silver-Antimony Project, also in Utah.

Fieldwork is underway, and an airborne magnetic survey is planned for November, reinforcing the company’s strategy to establish a foothold in key U.S. critical minerals.

The confirmation of copper mineralisation at Phoenix, combined with its strategic location in a prolific mining district, places Diablo Resources in a favourable position to build on these early results.

The forthcoming drilling at Philadelphia and Fair Dinkum is expected to test the continuity and scale of mineralisation along strike.

With concurrent activity across both copper and antimony assets, the company’s next quarter is set to deliver steady operational momentum and additional geological insights into one of America’s most prospective critical-minerals belts.

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