Diablo Resources (ASX:DBO) defines kilometre scale silver antimony anomaly at Utah Star Range

Diablo Resources has reported early stage exploration results from its 100% owned Star Range Silver Antimony Project in southwestern Utah, where first pass soil sampling has confirmed a silver antimony anomaly extending for more than 1 km at the South Star Prospect, supported by high grade rock samples and historical workings.

Highlights

• First pass soil sampling delineated a silver antimony anomaly exceeding 1,000 m in length at South Star, remaining open to the northeast.

• Historical rock samples returned up to 8,760 g/t Ag and +1% Sb, with recent Diablo samples including 1,609 g/t Ag and 4.82 g/t Au, plus multiple results above 200 g/t Ag with antimony.

• Coincident soil and rock geochemistry supports the interpretation of multiple Ag Sb vein and breccia systems within the project area.

• The Star Range Project comprises 238 unpatented lode claims covering approximately 18.5 km2, located around 6 km west of Milford, Utah.

• Ground geophysics at North Star has commenced, with the company targeting a maiden drill program in Q2 2026.

The Star Range Project sits within a historically productive mining district that hosted significant silver production through the late 1800s and early 1900s, including the nearby Horn Silver Mine, which produced 17,000,000 ounces of silver, 25,000 ounces of gold and 9,000,000 lb of copper from a single claim prior to 1930.

Diablo’s ground also lies close to currently operating copper mines near Milford, reinforcing the regional endowment.

Recent work at South Star involved 62 soil samples collected on an approximately 300 m by 100 m grid, with material taken from 15 to 20 cm below surface.

This program outlined a coherent Ag Sb anomaly that broadly parallels intrusive contacts, a spatial relationship interpreted by the company as reflecting mineral zonation across the project, from copper silver skarn proximal to intrusives through to distal silver antimony gold zones.

Mapping within the anomalous corridor has identified historical workings hosting silica carbonate veins and breccias, with assays up to 231 g/t Ag and 0.1% Sb.

Historical soil data extends the prospective trend to more than 2,500 m, suggesting scale potential across the broader South Star area.

Chief executive Lyle Thorne said the early results were reinforcing the geological model and supporting drill targeting, noting that

“the silver antimony anomaly now extends for more than 1 km and remains open to the northeast. This, combined with several historic workings and high grade rock samples, reinforces our view that the project hosts multiple mineralised zones.”

He also confirmed that ground geophysics at North Star has been completed, with results expected to refine drill targets across identified surface anomalies, while geochemical sampling continues across additional targets.

From a geological perspective, Star Range lies within a Basin and Range setting characterised by block faulted Palaeozoic to Tertiary sediments intruded by granitic bodies, including porphyritic quartz monzonite.

Mineralisation is described as structurally controlled replacement, skarn and breccia vein systems along sediment contacts, consistent with the company’s interpretation of multiple mineralised corridors.

Diablo has flagged further extensional soil sampling to the northeast and is assessing the applicability of ground based induced polarisation surveys, while also advancing mapping and sampling programs on site.

The company is concurrently reviewing additional opportunities within the US critical minerals sector.

With early stage geochemistry now defining kilometre scale anomalies and geophysics underway at North Star, Diablo is positioning Star Range for its maiden drilling campaign in Q2 2026.

In a broader context of renewed interest in US based critical minerals and precious metals systems, the Utah project represents a methodical progression from surface geochemistry toward drill testing, anchored by historical production credentials and emerging multi zone exploration targets.

Please note the following valuable information before using this website. 

Independent Research 

Market Open Australia is intended to be used only for educational and informative purposes, and any information on this website should not be taken as investment advice or guidance. It is important to conduct your own research before making any investment decisions, which should be based on your own investment needs and personal circumstances. Any investment decisions based on information contained on this website should be taken in line with independent financial advice from a qualified professional or should be independently researched and verified.