Aura Minerals Completes Feasibility Study for the Era Dorada Project
Aura Minerals Unveils Billion-Dollar Feasibility Study for Era Dorada, Cementing Growth Pipeline Amid Surging Gold Prices
On December 8, 2025, Aura Minerals announced the results of a positive Feasibility Study (FS) for its 100%-owned Era Dorada Gold Project in Guatemala. The study outlines a fully-licensed underground mining project with the following key metrics:
- Mineral Reserves: Proven and Probable Mineral Reserves of 1.75 million gold equivalent ounces (GEO) at a grade of 6.23 g/t AuEq.
- Production: Average annual production of 111,000 GEO for the first four years, with a Life of Mine (LOM) of 16.8 years.
- Capital Costs: Initial implementation CAPEX is estimated at US$382 million.
- Operating Costs: Average LOM All-In Sustaining Cost (AISC) is projected at US$1,178 per ounce.
- Economics: The project demonstrates robust financial metrics with an after-tax Net Present Value (NPV) at a 5% discount rate of US$1,344.5 million and an after-tax Internal Rate of Return (IRR) of 35.6%. The payback period is 2.82 years.
- Assumptions: The base case financial model uses a gold price of US$3,177/oz and a silver price of US$37.2/oz. At spot prices of US$4,200/oz gold, the CEO notes the after-tax NPV increases to US$2.17 billion with a leveraged IRR of 68%.
The release of the Feasibility Study for Era Dorada is a material and positive development, serving as a significant de-risking event for what is now the company's flagship growth project. This study successfully converts a large portion of the previously defined Mineral Resources into bankable Mineral Reserves and lays out a clear path to production.
Comparison with Previous PEA (June 9, 2025): - De-risking: The progression from a Preliminary Economic Assessment (PEA) to a Feasibility Study represents a major step forward, increasing the level of engineering, confidence in cost estimates, and overall project definition. - Production Profile: The FS outlines a stronger initial production profile (111k GEO/year for 4 years) compared to the PEA (91k oz Au/year for 4 years). - Capital Costs: A key risk highlighted is the substantial increase in initial CAPEX, which has risen by 45% from US$264 million in the PEA to US$382 million in the FS. While this reflects higher accuracy, it also represents a larger funding hurdle. - Economics & Gold Price: The project's economics are compelling but are heavily leveraged to the high gold price assumption of US$3,177/oz, a significant increase from the PEA's $2,410/oz base case. While reflective of the current market in this timeline, it exposes the project's valuation to gold price volatility.
Context of Historical Performance: The positive FS follows a string of successful execution milestones for Aura, which builds significant management credibility. 1. Borborema Mine: Achieved commercial production in September 2025, on time and on budget, and is now contributing to the company's production profile. This was a critical deliverable that management successfully executed. 2. MSG Mine Acquisition: The acquisition of the Serra Grande mine was announced in June 2025 and successfully closed on December 1, 2025, just a week before this FS release. This adds another producing asset and demonstrates the company's ability to execute on its M&A strategy. 3. Financial Strength: The company completed a ~US$218 million IPO on the Nasdaq in July 2025, bolstering its balance sheet to fund these growth initiatives. As of Q3 2025, the company maintained a strong balance sheet with $351 million in cash and low net debt.
In conclusion, the FS solidifies Era Dorada as the next major pillar of growth, following the successful commissioning of Borborema and the acquisition of MSG. It provides a clear line of sight for Aura to achieve its stated goal of producing over 450,000 GEO annually. While the increased CAPEX and reliance on high gold prices are points of caution, the de-risking of the asset and management's proven track record make this a materially positive event.
Aura Minerals is a rapidly growing mid-tier gold and copper producer with a portfolio of operating mines, development projects, and exploration assets across the Americas. The company currently has five producing mines: Aranzazu (Mexico), Minosa (Honduras), and Almas, Apoena, and the newly commissioned Borborema mine in Brazil. The company recently closed the acquisition of a sixth producing asset, the Serra Grande (MSG) mine in Brazil.
The company's flagship development project is now the Era Dorada Project (formerly Cerro Blanco) in Guatemala. Acquired in January 2025, it is a high-grade, underground gold project which, based on the new Feasibility Study, is poised to become a cornerstone asset, significantly boosting the company's future production and cash flow.