Diablo Resources (ASX:DBO) has reported surface sampling results of up to 1,580 g/t silver at the Gossan Prospect within its Horn Project in Utah, USA, while grab sampling of historical dump material at the Horn Silver Mine has identified antimony associated with silver mineralisation, adding a new critical mineral to the project's exploration profile ahead of a maiden drilling program planned for Q1 2027.

Key Points

  • A total of 65 reconnaissance rock samples were collected across the patented claims at the Horn Project in Utah, USA.
  • Gossan Prospect returned up to 1,580 g/t Ag and 0.44 g/t Au from initial sampling.
  • Dump sampling at the Horn Silver Mine identified antimony, with peak results of 1,495 g/t Ag, 0.41 g/t Au and 0.47% Sb.
  • Drum Prospect grab sampling returned results including 363 g/t Ag and 3.90 g/t Au, and 493 g/t Ag and 1.10 g/t Au.
  • Maiden drilling program targeting high-grade silver and critical minerals is planned for Q1 2027.

Gossan and Drum Prospect Sampling Results

Initial sampling at the Gossan Prospect returned three significant results: 1,580 g/t Ag and 0.44 g/t Au; 826 g/t Ag and 0.35 g/t Au; and 464 g/t Ag and 0.23 g/t Au. Grab sampling along the Drum Prospect also returned multiple high-grade silver results, including 509 g/t Ag and 0.39 g/t Au; 328 g/t Ag, 1.79 g/t Au and 1.29% Cu; 417 g/t Ag and 0.27 g/t Au; 493 g/t Ag and 1.10 g/t Au; and 363 g/t Ag and 3.90 g/t Au. The company disclosed that other critical minerals including lead and zinc returned peak results of up to 20% and 30% respectively from sampling across the project.

Antimony Identified at Horn Silver Mine Dump Material

Grab sampling of historical dump material at the Horn Silver Mine identified antimony associated with silver mineralisation, described by the company as an association not previously recognised at the project. Significant results included 1,495 g/t Ag, 0.41 g/t Au and 0.47% Sb; 157 g/t Ag, 0.35 g/t Au and 309 ppm Sb; and 39.3 g/t Ag, 0.26 g/t Au and 490 ppm Sb. The Horn Mine hosts historical production records of 17 million ounces of silver at an average grade of 604 g/t Ag. Historical mining exploited a steeply dipping mineralised structure to a depth of approximately 950 feet (289.5 metres), with the system remaining open along strike and at depth, according to the filing.

Drill Target Generation and Next Steps for Horn Project

The company stated that results from the 65-sample program are being integrated with geological, geophysical and structural interpretations to finalise priority drill targets. Disclosed next steps include completing follow-up mapping and sampling on priority silver-antimony targets, advancing drill target generation, finalising permitting and drill planning activities, and commencing a maiden drilling program targeting high-grade silver and critical minerals in Q1 2027. The company also stated it intends to undertake further systematic sampling of mineralised exposures within the old pit and historical dump material to further assess the distribution and tenor of antimony across the Horn Project.