Rimfire Resamples Historic Windy Ridge Core: What Will April Assays Reveal?
Rimfire Pacific Mining has located and resampled historic diamond drill core from its Windy Ridge Gold Antimony Prospect, aiming to validate decades-old gold intercepts and quantify antimony levels. Results are expected by early April 2026, potentially enhancing the value of its Broken Hill Base Metals Project amid rising critical minerals demand.
- Resampling of historic diamond drill core at Windy Ridge to confirm gold grades
- Antimony levels to be systematically assayed for the first time in key drill holes
- Windy Ridge hosts a 600m gold-antimony mineralised zone within a 2.5km prospective corridor
- Historic drilling from 40 years ago showed significant gold intercepts but limited antimony data
- Assay results expected by early April 2026, aligning with Australia's critical minerals strategy
Historic Core Resampled to Confirm Legacy Gold Grades
Rimfire Pacific Mining has taken a significant step in advancing its Broken Hill Base Metals Project by locating and resampling historic diamond drill core from the Windy Ridge Gold Antimony Prospect. This core, originally drilled between 1976 and 1985, had previously returned promising gold intercepts but lacked comprehensive antimony assays. The resampling effort aims to validate these historic gold grades and systematically quantify antimony, a critical mineral gaining strategic importance in Australia.
Windy Ridge: A Promising Gold-Antimony Corridor
Windy Ridge is characterised by a 600-metre-long gold-antimony mineralised zone within a broader 2.5-kilometre prospective corridor. Historic drilling revealed intercepts such as 36 metres at 0.93 grams per tonne (g/t) gold with 0.46% antimony, and 52 metres at 0.53 g/t gold, highlighting the prospect's potential. Surface rock chip samples have returned values up to 37 g/t gold, underscoring the prospectivity of the area. Despite this, antimony was not systematically assayed during the original drilling campaigns, leaving a critical gap in understanding the full mineralisation profile.
Strategic Timing Amid Growing Demand for Critical Minerals
The timing of this resampling is notable. The Australian Federal Government recently announced a $1.2 billion Critical Minerals Strategic Reserve, identifying antimony as a priority mineral. Rimfire’s Managing Director, David Hutton, emphasised that confirming antimony alongside gold enhances the Broken Hill project's attractiveness. This dual commodity focus positions Rimfire well to capitalise on the increasing demand for both precious and critical minerals.
Technical Insights and Next Steps
Visual inspection of the historic core confirmed the presence of sulphide minerals such as arsenopyrite and pyrite within sheared and brecciated quartz schists, typical hosts for gold-antimony mineralisation. Rimfire has resampled two key drill holes, AK4 and NPD-D1, collecting 42 quarter core samples for assay by ALS Pty Ltd in Adelaide. Results are anticipated by early April 2026. Should these assays confirm the historic gold grades and reveal significant antimony content, Rimfire plans to advance further geological interpretation, geophysical surveys, and drilling to delineate the resource more precisely.
Unlocking Value in a Historic Mining District
Located just 30 kilometres southwest of Broken Hill, the Windy Ridge prospect lies within the same geological sequence that hosts the world-renowned Broken Hill Line of Lode deposits. Rimfire’s renewed focus on this area, combining historic data with modern assay techniques, could unlock new value in a region with a rich mining heritage. The integration of gold and antimony exploration aligns with broader market trends favouring diversified critical mineral portfolios.
Bottom Line?
The awaited assay results will be pivotal in defining Windy Ridge’s potential as a dual gold-antimony asset, setting the stage for Rimfire’s next exploration phase.
Questions in the middle?
- Will the resampled assays confirm historic gold grades and reveal economically significant antimony levels?
- How might the presence of antimony influence the project's development strategy and market appeal?
- What are Rimfire’s plans for follow-up drilling and resource estimation pending assay outcomes?
