Ark Mines has reported a massive 428% increase in its Sandy Mitchell mineral resource estimate, now totaling 379.4Mt at 5,430ppm monazite equivalent. The resource is highly de-risked with 97% classified as Measured and Indicated, and the company is expanding its focus to an 11-mineral product basket.
Red Metal is advancing a Pre-Feasibility Study (PFS) for its Sybella rare earths project in Queensland, following successful column leach test work. The tests demonstrated strong recoveries for Nd, Pr, Dy, and Tb using a simple weak acid heap-leach approach with low acid consumption.
Ark Mines has reported rare earth extraction rates of up to 99.6% from its Sandy Mitchell monazite concentrate. The results indicate the concentrate responds well to conventional processing as the company targets production by 2028.
Ark Mines reports successful scoping metallurgical testwork by ANSTO on monazite concentrate from the Sandy Mitchell project. The tests achieved 98-99% light rare earth extraction via acid bake and ~98% via caustic conversion, demonstrating processing flexibility.
Ark Mines has expanded its Sandy Mitchell rare earths resource by 428% to 379.4Mt at 5,430ppm monazite equivalent. The updated estimate is highly confident, with 97% of the resource classified as Measured or Indicated, providing a foundation for an upcoming Pre-Feasibility Study.
Ark Mines has completed its Stage 3 drilling program at the Sandy Mitchell project, with all 218 holes intersecting mineralisation. The results, which include rare earth oxides and heavy minerals, are expected to underpin an updated mineral resource estimate due in Q3 2026.
