Red Mountain flexes Oaky Creek antimony potential

• First-pass metallurgical work produced a 51.8% antimony concentrate at 85% recovery

• The bulk sample returned a 19.9% Sb head grade with arsenic below detection at less than 0.01%

• Red Mountain says five priority drill targets are now lined up across the 3km Oaky Creek antimony system 

Special Report:Red Mountain Mining has delivered a 51.8% Sb concentrate at 85% recovery from Oaky Creek testwork, well above the 30-40% grade typically considered commercial. 

A pilot crush, grind and flotation study on a bulk sample from Oaky Creek North has underlined the project’s potential, with strong antimony prices supporting demand for quality concentrate.

First-pass metallurgical work produced a high-grade antimony concentrate result. Pic: RMX

Clean concentrate, simple mineralogy

The bulk sample returned a high head grade of 19.9% antimony and 0.25 ppm gold, showing strong primary mineralisation before any processing.

Arsenic in the head sample came in below detection at

Red Mountain Mining (ASX:RMX) said the quartz-rich sample contained 25.2% stibnite and 5.08% oxidised antimony, with minimal other sulphides or tellurides.

Most of the antimony sits in the recoverable ore mineral, which likely drove the strong flotation result.

Pic: Hillgrove and the Peel Fault put Red Mountain in proven antimony-gold country in NSW. Pic: RMX

Drilling comes next

The metallurgy result strengthens Red Mountain’s case for drilling at Oaky Creek, a 3km-long antimony system in NSW where five priority targets have been set for 2026 follow-up work.

Those targets were defined by auger soil sampling and rock chip work, which returned surface samples of up to 39.3% antimony and 1.09ppm gold.

Red Mountain is now planning about 2,000m of RC drilling to test whether Oaky Creek’s strong surface grades, low-arsenic concentrate profile and encouraging early recoveries continue at depth.

This article was developed in collaboration with Red Mountain Mining, a Stockhead advertiser at the time of publishing.

This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.