PTR Minerals Ltd

Petratherm Limited is an ASX-listed Australian critical-minerals explorer (ASX: PTR) headquartered in Adelaide, South Australia. Originally a geothermal-energy company, Petratherm has refocused on critical minerals and is advancing its flagship Muckanippie Project in South Australia, where it has discovered large-scale, high-grade titanium-rich heavy mineral sands (HMS) at the Rosewood and Claypan prospects. Surface samples have returned exceptional titanium-dioxide (TiO2) grades, and the company has defined a substantial exploration target at Rosewood with titanium-bearing rutile, anatase and pseudo-rutile minerals. The project area is also prospective for rare-earth elements and other critical minerals associated with the heavy-mineral horizons. Petratherm raised about A$8 million in 2025 to fast-track drilling toward a maiden resource estimate and metallurgical test work, and holds a majority joint-venture interest under a farm-in arrangement with Narryer Metals, positioning it as an emerging titanium and critical-minerals developer.

The company now trades on the ASX as PTR Minerals Ltd (ASX: PTR). Its annual report gives its office as 200 Greenhill Road, Eastwood, South Australia.