Unprecedented Results in Metallurgical Test Work
Viridis Mining and Minerals Limited (ASX: VMM) has released its latest update, showcasing groundbreaking metallurgical test work results from the Southern Complex, comprising Cupim South and Centro Sul. This maiden test, involving a 41kg composite sample from 26 drill holes, achieved ionic recoveries of 83% for Magnetic Rare Earth Oxides (MREO), marking the highest recoveries ever recorded at the Colossus Project. The composite sample demonstrated a head grade of 4,561ppm Total Rare Earth Oxides (TREO), with 33% of it consisting of key magnetic rare earths like Nd, Pr, Dy, and Tb.
First-of-Its-Kind Recoveries from Untested Areas
The Southern Complex test work introduced new benchmarks, as 88% of the ore tested came from previously unexplored regions. The diagnostic leach tests employed a cost-efficient ammonium sulfate (AMSUL) reagent at a pH of 4.5, revealing improved recoveries at lower reagent concentrations. This achievement underscores the unique geological potential of the Southern Complex, especially in comparison to industry peers.
Highlights of the Metallurgical Breakthrough
The metallurgical testing revealed transformative results, including:
- Average recovery of Nd + Pr: 83%
- Average recovery of Dy + Tb: 67%
- Overall MREO recovery: 83%
Remarkably, this recovery improvement was achieved using a more neutral pH and a reduced reagent concentration, setting a new standard for efficiency and environmental sustainability.
Operational Implications for the Colossus Project
The improved recoveries at higher pH and lower reagent concentration promise significant cost reductions in operational expenses (OPEX) and capital expenditures (CAPEX). The findings also enhance the projected production rates and basket value of rare earth elements (REEs) from the Southern Complex, elevating its economic profile within the Colossus Project.
Next Steps for the Southern Complex
Viridis plans to progress with slurry leach testing, impurity removal, and mixed rare earth carbonate (MREC) precipitation to establish complete recovery data. These results will be integrated into a comprehensive scoping study due in Q1 2025. The company is also advancing its resource modeling and environmental licensing efforts to support future mine planning.
CEO’s Vision for the Project
Rafael Moreno, CEO of Viridis Mining, expressed his optimism about these results:
"These exceptional ionic recoveries and operational efficiencies highlight the unique value proposition of the Southern Complex. Paired with our high-grade geology, we are well-positioned to deliver significant production rates with a low-cost and environmentally friendly approach. The upcoming scoping study will further showcase the transformative potential of the Colossus Project."
A Step Toward Global Rare Earth Leadership
With the latest breakthroughs, Viridis Mining and Minerals is poised to become a cost-efficient leader in the global rare earth market. The company's strategic focus on sustainable and high-value production underscores its commitment to meeting growing demand for critical minerals.
