Resolution Minerals (ASX: RML) will commence a major Phase 2 drilling campaign at its Horse Heaven Gold-Antimony-Tungsten-Silver Project in Idaho, targeting the scale and continuity of the Golden Gate mineralised system.
The fully permitted program will comprise up to 13,700 metres of diamond drilling across as many as 45 holes, representing a significant expansion on the company’s 2025 campaign.
Drilling with two MP1500 core diamond rigs is scheduled to begin in early May 2026, to support progression toward a maiden Mineral Resource Estimate (MRE), subject to successful outcomes.
The Phase 2 program follows a successful 2025 drilling campaign that intersected gold mineralisation in all 14 holes, with mineralisation remaining open at depth across the Golden Gate fault zone.
Previous drilling returned broad intercepts including 253m at 1.5 grams per tonne gold and 197.5m at 1.26g/t gold, reinforcing the scale potential of the system.
Expanded Program Targets Scale
The upcoming campaign will target both Golden Gate North and Golden Gate South, with drilling designed to test strike extensions, depth extensions and the continuity between the two zones.
Resolution plans to allocate approximately 60% of drilling to Golden Gate South and 40% to Golden Gate North, with flexibility to adjust based on results and no reverse circulation drilling planned.
At Golden Gate North, drilling will include infill and step-out holes to expand known mineralisation and follow up broad gold intercepts that remain open at depth.
Key historical results include 189.2m at 1.30g/t gold, including higher-grade intervals within the broader zone, along with intercepts of 21m at 0.06% tungsten, highlighting the project’s multi-commodity potential.
Drilling at Golden Gate South will focus on expanding a newer discovery where previous drilling intersected 99.1m at 0.38g/t gold from surface to end of hole.
This mineralisation occurs within altered and brecciated intrusive rocks associated with the Golden Gate fault zone, consistent with a shear zone-hosted system.
Exploration Model Supports Large System
Resolution interprets the Golden Gate mineralisation as part of an intrusive-related gold system controlled by northeast-southwest trending fault structures that are considered to play a key role in both mineral distribution and alteration across the project area.
The company is still determining whether Golden Gate North and South represent a continuous system or separate but related zones, with further drilling required to resolve the geometry.
The broader mineralised envelope supports the company’s interpretation of a large-scale system with similarities to nearby deposits in the region.
“Following our impressive 2025 drill campaign, it is clear that Golden Gate hosts a large continuous gold mineralised system, with all holes intersecting mineralisation and remaining open at depth,” chief executive officer of US operations Craig Lindsay said.
“Importantly, mineralisation remains open in multiple directions, and we are only beginning to understand the full scale for the Golden Gate system.”
The upcoming program is designed to both define the size and shape of the system, and advance the project toward a maiden JORC-compliant MRE.
Next Steps Focus On Resource Definition
Resolution is finalising preparations for the 2026 field season, with drilling expected to run through to mid-August 2026.
The program is designed to systematically test mineralisation along strike between Golden Gate North and South and extend the system in multiple directions.
Ongoing assay results and geological interpretation will guide step-out and follow-up drilling as the company works to define the overall scale of the system.
The results from the 2026 campaign are expected to underpin continued advancement toward a maiden Mineral Resource at Golden Gate.
