What was the major announcement from Resolution Minerals (ASX:RML) regarding Antimony Ridge?

Resolution Minerals has completed 3D modelling that reveals a massive network of high-grade antimony and silver-bearing vein swarms at its Antimony Ridge Mine Project.

Why is antimony a significant focus for Resolution Minerals (ASX:RML)?

Antimony is a critical mineral used in high-tech applications, including flame retardants and batteries. By proving up high-grade veins (historically up to 5% Sb and securing U.S. federal support for permitting, RML is positioning itself as a strategic supplier of a metal that is essential for the energy transition and defence sectors.

What does the U.S. FAST-41 selection mean for Resolution Minerals (ASX:RML)?

The Horse Heaven Project, which includes Antimony Ridge, was selected for U.S. FAST-41 Transparency Coverage. This federal initiative is designed to streamline and accelerate permitting timelines for major infrastructure and energy projects.

How high are the historical silver and antimony grades at Antimony Ridge?

Historical mining data from WWI, WWII, and the Korean War shows exceptionally high grades at the site, with antimony (Sb) consistently reaching between 30% and 50%.

What are the key technical details of the new 3D model?

The model shows 30 mineralised vein swarms arranged in en echelon clusters with a vertical range of $250\text{m}$. These high-grade veins are surrounded by a larger "halo" of lower-grade mineralisation (0.5% to 2% Sb)

What is the current share price and market sentiment for Resolution Minerals (ASX:RML)?

At the time of this announcement, Resolution Minerals was trading at $\$0.069$. While the technical data is positive, the stock remains in the speculative micro-cap category.

What are the immediate risks for investors in Resolution Minerals (ASX:RML)?

The primary risks include exploration uncertainty and funding. Although 3D modelling is a strong indicator, it does not guarantee that drilling will encounter the same grades or volumes predicted.

Image for illustrative purposes only. Not a real photo.

Resolution Minerals unveils antimony discovery

Written by Liezl GambePublished Apr 10, 2026, 5:15 AMLast Updated Jul 6, 2026, 10:30 AM

Resolution Minerals (ASX:RML) announced a breakthrough at its Antimony Ridge Mine Project, part of the broader Horse Heaven strategy.

New 3D modelling has revealed a massive network of high-grade antimony and silver-bearing vein swarms, demonstrating substantial scale and expanding exploration potential over a 1000m x 700m area.

The modelling identified over 100 individual high-grade veins organised into 30 mineralised swarms, fault breccias, and stockworks.

These en echelon clusters show a vertical range of 250m and are enveloped by a larger, lower-grade halo containing 0.5% to 2% antimony.

The discovery is bolstered by the site's rich history; Antimony Ridge was previously mined during WWI, WWII, and the Korean War, with historical grades reaching an exceptional 50% Sb and silver levels as high as 1,420g/t Ag.

This technical milestone follows the recent selection of the Horse Heaven Project for US FAST-41 Transparency Coverage.

The federal initiative is expected to significantly accelerate permitting timelines for a planned 250-drill-hole programme and large-scale bulk sampling.

Operational momentum continues to build as the company awaits preliminary metallurgy results from a 100kg bulk sample of stibnite material.

At the time of reporting, Resolution Minerals’ share price was $0.069.

Resolution Minerals unveils antimony discovery

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