Resolution Minerals Ltd (ASX:RML, OTCQB:RLMLF, FRA:NC3) has advanced exploration and development work at its 100%-owned Horse Heaven Gold-Antimony-Tungsten-Silver Project in Idaho, USA, during the March quarter.
Rock sampling at Antimony Ridge returned assays of up to 48.7% antimony and 890 g/t silver, confirming a high-grade polymetallic system across the historical mine area.
The company also collected about 100 kilograms of representative material for metallurgical test work, while post-quarter work included 3D modelling of extensive vein swarms and the production of high-purity antimony trioxide.
“This was a strong Quarter for Resolution, with results continuing to demonstrate the scale of the Golden Gate system and broader opportunity emerging across Horse Heaven," Craig Lindsay, Resolution’s CEO - US Operations, said.
"The combination of high-grade antimony at Antimony Ridge, a growing gold system at Golden Gate, and the addition of processing infrastructure at Johnson Creek positions the Company to advance a compelling US-based critical minerals platform. With a major drilling program about to commence and further technical work underway, we are focused on building on this momentum through 2026.”
Golden Gate gold system expands
Final assays from 2025 drilling at Golden Gate confirmed broad gold mineralisation across Golden Gate North and South, with all holes intersecting gold and several ending in mineralisation.
Drilling also identified tungsten mineralisation, including 8 metres at 0.14% tungsten from 79.3 metres within a broader 21-metre interval at 0.80 g/t gold.
A new gold discovery at Golden Gate South has extended the interpreted mineralised system to about 1.5 kilometres of strike.
Phase 2 drilling to start in May
Resolution plans to begin Phase 2 drilling at Golden Gate in May 2026, subject to weather conditions.
The program will comprise up to 13,700 metres across as many as 45 diamond holes, targeting extensions along strike and at depth, as well as areas between the northern and southern zones.
Results are expected to support work toward a maiden mineral resource estimate, targeted for Q1 2027.
Johnson Creek acquisition strengthens pathway
During the quarter, Resolution completed the acquisition of the Johnson Creek Tungsten and Antimony Mill and associated infrastructure near Horse Heaven.
Sampling of historical tungsten stockpiles returned 1.85% WO₃ and 0.11 g/t gold, with scheelite confirmed as the main tungsten-bearing mineral.
Further sampling and test work are planned to assess the stockpiles under the JORC Code.
Funding and corporate progress
Resolution ended the quarter with A$8.17 million in cash and later completed a A$20 million placement to accelerate drilling, metallurgy and permitting.
The company also lodged a NASDAQ registration statement and established a Level 1 ADR facility, with a US listing expected shortly.
Next steps
Resolution’s near-term focus is on starting Phase 2 drilling at Golden Gate, progressing Antimony Ridge permitting, bulk sampling and metallurgy, continuing Johnson Creek stockpile assessment, and advancing its broader US critical minerals development strategy.