Cobra Resources (LON: COBR) has commenced in-field permeability trials at its Boland Ionic Heavy Rare Earth Project in South Australia, marking a key milestone in the company’s efforts to advance a low-cost and environmentally sustainable in-situ recovery (ISR) mining approach.
The trials, set to run for 7–14 days, will evaluate aquifer discharge rates and orebody permeability, critical factors in determining ISR feasibility. These field tests build on prior bench-scale studies, which achieved 66% heavy rare earth recovery in just 17 days using minimal acid, underscoring the potential for a cleaner and more efficient extraction process.
In a parallel development, Cobra has executed a Deed of Assignment with the Barngarla Traditional Owners, securing the transfer of tenure for three key exploration licences (EL 6742, 6774, and 6780) — areas that host priority rare earth element (REE) targets.
Managing Director Rupert Verco said the start of in-field trials represents “a major step toward demonstrating ISR’s potential as a low-cost, sustainable production method for critical heavy rare earths such as dysprosium and terbium,” adding that the agreement with the Barngarla People reflects the company’s commitment to strong community partnerships and responsible development.
