Latest Heap Leaching News

Australian Rare Earths Limited (ASX: AR3) reported robust progress at its Koppamurra Rare Earths Project, delivering a high-purity Mixed Rare Earth Oxide pathway with near-complete rare earth recovery and improved heap leach performance. Concurrently, the company defined new uranium targets at Overland with drilling imminent, supported by a strengthened balance sheet following a $6 million placement and government grants.

Tartana Minerals has raised $4.5 million to accelerate drilling and boost copper sulphate production, underpinning its extensive critical metals portfolio in Far North Queensland.

OD6 Metals has secured a strategic foothold in the US critical minerals market by acquiring the Quinn Fluorspar Project in Nevada, delivering ultra-high-grade assay results and commencing systematic exploration. Meanwhile, metallurgical progress at its Splinter Rock rare earths project and new copper targets at Gulf Creek underpin a diversified critical minerals portfolio.

Marmota Limited has launched an extensive maiden drilling campaign targeting the southern Mainwood extension of its Greenewood gold discovery in South Australia’s Gawler Craton, aiming to expand the mineralised strike to 2km.

Far East Gold Limited reveals promising metallurgical test results from its Idenburg project, showing gold recoveries around 95% using conventional processing methods. These early findings suggest a straightforward processing route but remain preliminary pending further testing.

Tartana Minerals has finished stacking 50,000 tonnes of copper-rich pit fill and is finalising a key plant upgrade, setting the stage for copper sulphate production to resume within weeks.

Axel REE is accelerating its in situ recovery (ISR) mining trials at the Caladão Project in Brazil, targeting rare earth elements and gallium extraction through a low-cost, environmentally friendly method. The company is fully funded for pilot wellfield trials at the Woolrich deposit, with expansion potential at Paraíso and Tiger Creek.

TG Metals Limited has unveiled a major Mineral Resource Estimate upgrade for its Van Uden Gold Project, with Indicated gold ounces surging 120% to 152,600 oz and total pit constrained resources reaching 270,800 oz at 1.06 g/t Au. This marks a significant step in advancing the project towards near-term production.

Silver Mines has delivered promising exploration results from its Calico North and Kramer Hills projects in California, with standout silver and barite assays supporting imminent drilling campaigns.

Cavalier Resources’ 2026 Pre-Feasibility Study update boosts the Stage 1 NPV of its Crawford Gold Project to A$77.2 million at A$6,500/oz gold, reflecting resilience amid supply chain pressures. The project maintains its ore reserve and pit design, with financing negotiations advancing.

Sun Silver has engaged global engineering firm Ausenco to lead critical concept and scoping studies for its Maverick Silver Project in Nevada, aiming to underpin a maiden Scoping Study by late 2026. The move leverages Ausenco’s North American precious metals expertise and comes as silver prices hover near US$77 an ounce, bolstering project economics.

Critica Limited has achieved a significant breakthrough at its Jupiter Rare Earth Project, lifting magnet rare earth recovery to approximately 81% and total rare earth oxide recovery to around 71% through pilot plant optimisation. This advance strengthens the foundation for its ongoing scoping study and downstream processing plans.