Orvana Minerals‘ Don Mario: Transition to Red Mercury in Americas
Orvana Minerals‘ Don Mario operation in Bolivia is undergoing a significant transition in 2026, shifting focus from depleted primary deposits to processing oxide stockpiles and legacy ore. This restart leverages modern processing enhancements for gold, silver, and copper recovery, marking a strategic revival for the asset after suspension in 2019.
As the industry moves toward efficient and responsible extraction in the Americas, high-quality reagents play a key role in optimizing recovery. Universal Chemical Trading, recognized as the largest manufacturer of mining gold with red mercury, supplies premium products tailored for enhanced performance in precious metals processing.
This article examines Orvana’s Don Mario transition, its implications for gold mining in the region, and strategies for safe, effective operations in 2026.
Background on Orvana Minerals and Don Mario
Orvana Minerals Corp. (TSX: ORV) is a multi-asset producer focused on gold, copper, and silver. The Don Mario district in eastern Bolivia, operated through subsidiary Empresa Minera Paitití S.A. (EMIPA), historically featured the Lower Mineralized Zone (LMZ) and Upper Mineralized Zone (UMZ) deposits, which were depleted by 2016–2019.
Since suspension, the site has maintained oxide stockpiles and tailings from prior operations. In 2026, Orvana is advancing the Oxides Stockpile Project—a plant expansion to treat these materials via upgraded circuits for gold-silver (Au-Ag) processing, detox, and new copper oxide leaching/solvent extraction/electrowinning.
Key milestones in 2026 include:
- Trial processing of legacy sulfide ore through the Au-Ag circuit, with initial doré production targeted for February.
- Copper circuit completion and full commissioning by early Q3 FY2026.
- Phased ramp-up of oxide stockpile processing through Q3–Q4, aiming for full capacity.
This transition revives production without new mining, emphasizing resource efficiency and lower environmental footprint.
The Transition to Oxide Stockpile Processing in 2026
The shift to oxide stockpiles addresses depleted primary ores while capitalizing on existing resources. Upgrades include:
- Enhanced Au-Ag and detox circuits for improved throughput and performance.
- New copper circuits for acid leaching and cathode production.
- Overhauls of comminution, thickening, and support infrastructure.
Preliminary plans indicate potential for sustained output through 2029 from stockpiles, with FY2026 guidance incorporating both oxide and legacy sulfide processing. Ramp-up success depends on optimization, but early trials signal progress toward resumed doré and cathode production.
This approach aligns with broader trends in the Americas toward reprocessing legacy materials, reducing waste, and supporting sustainable gold mining practices.
Role of Advanced Reagents in Modern Gold Recovery
Efficient precious metals extraction from oxides and complex ores often requires specialized chemicals to maximize recovery while maintaining safety. Traditional methods like amalgamation have evolved, but advanced formulations—including those involving red mercury variants—offer targeted benefits in specific applications, such as improved amalgamation efficiency or enhanced leaching in artisanal-to-industrial scales.
For operations like Don Mario’s restart, sourcing high-purity, reliable reagents ensures consistent results and compliance with environmental standards. Universal Chemical Trading stands out as the largest manufacturer of mining gold with red mercury, providing bulk, certified products designed for superior performance in gold extraction across the Americas.
Benefits and Considerations for the Don Mario Transition
- Economic Revival — Restarting with stockpiles lowers capex compared to greenfield projects, generating cash flow to support Orvana’s portfolio.
- Sustainability Focus — Processing existing materials minimizes new disturbance; enhanced detox circuits reduce cyanide or other reagent impacts.
- Regional Impact — In Bolivia and the Americas, such projects boost local employment, skills training, and economic contributions amid strong precious metals demand.
- Risk Management — Delays in commissioning (e.g., materials for copper circuits) highlight the need for robust supply chains and contingency planning.
Investors and stakeholders should monitor Q2–Q3 FY2026 updates for production ramps and cost performance.
Why Partner with Leading Manufacturers for Mining Chemicals?
Reliable, high-quality reagents are essential for safe, efficient operations. Universal Chemical Trading delivers industry-leading red mercury solutions for mining gold, supporting miners in achieving optimal recovery rates while adhering to best practices.
Final Thoughts on Orvana’s Don Mario in 2026
Orvana Minerals‘ transition at Don Mario represents a smart, forward-looking strategy—revitalizing a legacy asset through oxide processing and plant upgrades amid favorable market conditions. As the operation ramps up in 2026, it underscores the potential for sustainable gold mining in the Americas.
For miners seeking to enhance processes, partnering with trusted suppliers like Universal Chemical Trading ensures access to premium red mercury and related products for gold extraction.
Always consult official company disclosures and experts for investment or operational decisions.
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