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Highlights
- Resolution Minerals has completed 960 metres of diamond core drilling across four HQ-sized diamond core holes as part of its 3,000-metre Phase 1 program at the Golden Gate Target in Idaho.
- Drilling has intersected altered granodiorite of the Idaho Batholith at depths of around 260 metres.
- Oxidation zones have been confirmed between 70–90m downhole in two holes (40–50m vertical depth).
- Alteration textures and mineralisation styles show similarities to Perpetua Resources’ nearby Stibnite Gold Project.
- Scheelite (tungsten ore) has been identified under UV light across multiple drill intervals.
- Multi-element assay testing has been planned with a focus on intervals containing visible scheelite.
- Drilling acceleration has been considered with a second rig to meet the 1 October 2025 target.
Resolution Minerals Ltd (ASX: RML; OTCQB: RLMLF) has provided an update on its maiden Phase 1 Diamond Core Drilling Program at the Golden Gate Target within the Horse Heaven Gold-Antimony-Tungsten-Silver Project in Idaho, U.S.A.
Phase 1 Drilling Overview
- The planned Drill Program includes 3,000 metres of diamond core drilling across 8 to 10 holes.
- Four HQ-sized holes have been completed to date, totalling 960 metres (3,222 ft).
- Holes were drilled to depths of approximately 260 metres (870 ft).
- The dominant lithology intersected consists of bleached, altered, and locally oxidised quartz-sericite to silicified felsic granite, interpreted as granodiorite to monzonite of the Cretaceous Idaho Batholith.
- The depth of oxidation observed in holes HHGG25-001 and HHGG25-002 is between 70 and 90 metres downhole (40–50 metres vertical depth from surface).
Visual Observations and Mineralisation
The company’s geological team, after consultation with technical experts familiar with Perpetua Resources’ adjacent Stibnite Gold Project, noted key similarities:
- Low-temperature epithermal mineralisation and quartz veins with fine-grained sulphides.
- Fine-grained sulphides in sheared fault gouge in holes HHGG25-001, HHGG25-002, and HHGG25-003.
- Notably, scheelite (CaWO₄) mineralisation was identified under UV light, marking the presence of tungsten in several drill intervals, including, but not limited to:
- HHGG25-002:0–73.15 m (239.5–240.0 ft)
- HHGG25-003:6–0.75 m (2.0–2.5 ft) and 3.0–3.3 m (9.9–10.8 ft)
- HHGG25-003:0-3.3m (9.9ft to 10.8ft) downhole interval.
This represents a significant development as tungsten had not been assayed in historical drilling, despite the region’s history as a tungsten producer for the U.S. government in the 1950s.
Next Steps
Resolution has outlined the following next steps for the Golden Gate Target:
- Structural analysis to determine true width intervals for current and future drilling.
- Fifth hole of up to 12 holes now underway.
- Multi-element assay tests planned for intervals with visible scheelite.
- Consideration of a second drill rig to accelerate the program and target completion by 1 October 2025.
Reflecting on the development, Resolution Minerals, CEO of U.S. Operations, Craig Lindsay, commented: “The drilling is more encouraging than initially expected, with alteration textures similar to the adjoining Stibnite mine and visible tungsten as scheelite in all logged holes to date. Initial assay results are eagerly awaited, not just for gold and silver, but for tungsten as well, which had not been assayed for in this area, despite previous workings. What is also exciting is that this target is only a postage stamp size in a much larger project.”
Shares of RML traded at AUD 0.056 at the time of writing on 08 September 2025.
