O’Callaghans Tungsten-Copper-Zinc-Lead Deposit Development

under evaluation

Greatland Resources Ltd has outlined a substantial new critical minerals asset with a maiden mineral resource estimate for the O’Callaghans tungsten-copper-zinc-lead deposit in Western Australia. The deposit totals 70 million tonnes at 0.35% tungsten trioxide, alongside copper, zinc, and lead, making it one of the largest high-grade tungsten deposits globally. The project benefits from its proximity to the Telfer processing hub, about 10 kilometres away, offering potential synergies with existing infrastructure. Historical work includes a pre-feasibility study for a long-life underground mining operation with a dedicated processing plant and tungsten refining capability. The company is assessing pathways for further technical studies, partnerships, or staged development options.