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Highlights
- Two MP1500 drill rigs secured to commence a Phase 2 drilling program at the Golden Gate prospect.
- Up to 45 drill holes planned over ~13,700m to expand known gold zones at Golden Gate North and South.
- The program will also evaluate tungsten mineralisation around historical mine workings and identified soil anomalies.
- Site access, infrastructure, and technical teams are in place, enabling drilling operations to begin next week.
- Program to support maiden Mineral Resource Estimate targeted for 1Q 2027, subject to results.
Resolution Minerals Ltd (ASX:RML) (OTCQB:RLMLF) has reported the mobilisation of drilling rigs for an extensive drilling campaign at the Golden Gate prospect, part of the Horse Heaven Project in Idaho, United States. The upcoming Phase 2 drilling program will target both gold and tungsten mineralisation with the objection of defining the extent and scale of gold mineralisation across Golden Gate South and Golden Gate North.
Drill Rigs Mobilised for Phase 2 Campaign
Two MP1500 diamond core drill rigs are being moved to the Golden Gate site, with the first expected within the next few days and the second scheduled to arrive by mid-May. Initial payments have been completed to facilitate the drilling campaign, which is expected to begin late next week.
The Phase 2 program will include up to 45 drill holes covering a total of approximately 13,700 metres (45,000 ft).
Focus on Expanding Gold Mineralisation
The program will primarily focus on the Golden Gate North and Golden Gate South targets. At Golden Gate North, the program will include infill and step-out drilling, designed to extend known zones of gold mineralisation and testing potential system extensions based on previous results.
At Golden Gate South, drilling will follow up on a previously reported discovery hole, which returned 99.1m @ 0.38g/t Au, with further work planned to expand this zone.
The program aims to determine the scale and extent of gold mineralisation and advance work toward an initial Mineral Resource Estimate targeted for the first quarter of 2027, subject to exploration results.
2025 Drilling Results
Phase 1 drilling conducted in 2025 at Golden Gate South and North for 14 holes spanning 3,780m, intersected significant gold mineralisation -
- 0m @ 1.50g/t gold (HH-GG25-003C);
- 5m @ 1.26g/t gold (HH-GG25-001C);
- 2m @ 0.60g/t gold (HH-GG25-002C); and
- 8m @ 0.64g/t gold (HH-GG25-004C).
Tungsten Targets to Be Evaluated
In addition to gold, the program will assess the extent of tungsten mineralisation in areas surrounding historical mine workings at the Golden Gate Tungsten Mine where stockpile samples returned notable assay results.
At Golden Gate South, exploration will also target a tungsten anomaly in soil samples.
Proposed drilling at Golden Gate North & South 2026. (Image source: Company update)
Infrastructure and Access in Place
Access to the project site has been restored, and supporting infrastructure has been re-established. This includes camp facilities, water supply systems, and filtration equipment. Technical personnel have already arrived on-site, with drilling crews expected to follow shortly.
Roadwork improvements on the main access route are also underway.
The Phase 2 drilling campaign marks the next stage of exploration at the Golden Gate prospect. With rigs mobilised, infrastructure in place, and defined targets across both gold and tungsten zones, the campaign is expected to expand the current understanding of mineralisation and guide future resource development efforts.
RML shares were trading at AUD 0.068 per share at the time of writing on 30 April 2026.
