Diablo Resources (ASX:DBO) drone survey advances Star Range Silver Antimony Project

Diablo Resources has taken a material step forward at its Star Range Silver Antimony Project in southwestern Utah, following the completion of a drone airborne magnetic survey that provides new sub surface insights across a district with a long history of precious and base metals production.

The work forms part of the company’s stated program to integrate geophysical and geochemical datasets across 186 lode claims that cover 3,582 acres, refining multiple high grade silver antimony targets ahead of maiden drilling.

Highlights

• Drone magnetic survey completed by a Nevada based contractor over the Star Range Silver Antimony Project in Utah.
• Supports upcoming exploration by identifying potential new structural and intrusive related target zones.
• Survey data is being processed, with interpretation and targeting underway to refine existing high grade silver antimony targets.
• Project covers 186 lode claims for 3,582 acres on Bureau of Land Management administered land.
• Historical rock sampling includes bonanza grades up to 8,760 g per t Ag and more than 1%  Sb at surface.
• Significant soil anomalies at both North Star and South Star with no drilling completed over these areas.

The Star Range Project is located 6 km west of the town of Milford in Beaver County and benefits from infrastructure that includes maintained gravel roads, nearby power and gas utilities and access to the Union Pacific Railway line through Milford.

The project sits within the Star Range, a site of intense historical mining activity producing lead, zinc, copper, gold and silver until the mid 1960s, and is located in a district that includes the historical Horn Silver mine, which produced 17 Moz of silver, 25 Koz of gold and 9 Mlb of copper from a single 20 acre mining claim.

The drone survey was undertaken by MHW Geo Surveys International using a Geometrics MagArrow magnetometer system towed by an Arksky X55 heavy lift quadcopter.

The system records 100 readings per second, acquiring high resolution magnetic data that is currently being processed before integration with historical mapping, sampling and soil datasets.

The MagArrow sensor is suspended on a 2.5 m lanyard to remove it from the noise of the UAV, with data captured along east west flight lines spaced 100 m apart at approximately 75 m height.

Across the project area, historical exploration has been intermittent, with public domain records indicating 372 rock samples and 406 soil samples collected by several companies between 2012 and 2020.

The sampling returned notable silver grades at both the North Star and South Star prospects, including 1,310 g per t Ag with 0.4% Sb and 1,380 g per t Ag with 0.5% Sb at North Star, as well as 8,760 g per t Ag and more than 1% Sb at South Star.

Soil programs outlined large scale anomalies of 1.5 km at North Star and 400 m at South Star, with no drilling to date over these zones.

In a statement to the market, Diablo Resources chief executive Lyle Thorne said,

“Exploration activities at Star Range continue to advance with the completion of our planned airborne magnetic survey. This data will provide important sub surface information on the geology and structure of the project area, which, when integrated with existing exploration datasets will aim to refine and prioritise exploration moving forward.”

He added that geochemical sample assay results are pending and noted the commencement of drilling at the Phoenix Copper Project.

The company has outlined a series of immediate tasks, including finalising magnetic data, interpreting surface geochemical assays and updating geological models to improve understanding of mineralisation controls, continuity and scale across priority target areas.

Further work also includes the review of additional critical minerals opportunities in the United States and the completion of drilling at the Fair Dinkum Copper Prospect before submitting samples to the laboratory.

While data processing and interpretation continue, the survey results are expected to contribute meaningfully to Diablo’s broader program at Star Range, consolidating geophysical and historical surface datasets to better guide upcoming exploration activities.

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