An Ai-generated depiction of what REE concentrates could look like. Source: Adobe Stock
The Market Online - At The Bell

Join our daily newsletter At The Bell to receive exclusive market insights

Mount Ridley Mines Ltd (ASX:MRD) has announced a maiden mineral resource estimate (MRE) for its Mia rare earths prospect in Western Australia, with the inferred resource sitting at 168 million tonnes at 1,201 part per million (ppm) total rare earths (TREO).

The estimate focuses on Mia’s inner zone – which is an open-ended, 8.5 kilometre long corridor of clay-hosted rare earth mineralisation – and includes a higher-grade zone of 85Mt at 1,558ppm TREO (using a cutoff of 1,000ppm).

Mount Ridley have also progressed with sighter metallurgical tests on the deposit, showing that the in-situ grade of mineralisation could be increased by up to 160 percent through simple screening, as well as indicating that rare earth elements (REEs) could be leached into solution.

Chairman Peter Christie said that reaching a maiden resource estimate was an important goal for Mount Ridley, which the team was looking forward to building on.

“Through drilling, the Company has progressively revealed substantial intersections of clay-hosted REE mineralisation and today, we are pleased to report our maiden Mineral Resource Estimate for the central Mia Prospect,” he said.

“This is a key milestone for the Company and highlights the potential of the Mt Ridley Project which is in a favourable location just 55km from the Port of Esperance.”

Mount Ridley has been trading at 0.2 cents.

mrd by the numbers
More From The Market Online
ASX Earnings concept

Week 8 CY26, Wrapped: Unusually quiet Trump amplifies ASX earnings, but Iran fears growing

It’s been an interesting two weeks, largely because we haven’t heard too much from Donald Trump lately.
The Market Online Video

Prospect Resources on ‘the copper capital of Africa’ and the tier-one mining potential in Zambia

Prospect Resources joins HotCopper to talk about why it's been looking into the underlying geology at…
The Market Online Video

Australian Gold and Copper: Maiden resource complete, growth story continues

HotCopper talks to AGC MD Glen Diemar as precious and critical metals explorer Australian Gold and…
The Market Online Video

HotCopper Highlights, Week 8: Zip unfastened; Coles in trouble, BHP’s India pivot & more

Good Afternoon and welcome to the latest edition of HotCopper Highlights where we go through the stocks and announcements you were watching this week on