F-1/A: Aura Minerals Updates SEC Filing with Key Technical Reports on Brazilian and Guatemalan Gold Projects, Revealing Strong Reserves and Growth Potential

Aura Minerals Inc. has filed an amendment to its F-1 registration statement, including detailed technical reports for its Apoena and Almas gold projects in Brazil, and the newly acquired Era Dorada gold project in Guatemala, highlighting significant mineral resources, reserves, and positive economic assessments.

Summary

• Aura Minerals Inc. filed an Amendment No. 2 to its Form F-1 Registration Statement, primarily to amend the exhibit index and submit large technical reports.
• The filing includes details on 146,519,452 non-interest bearing contingent value rights (CVRs) issued on January 13, 2025, as partial consideration for the acquisition of Bluestone Resources Inc., entitling holders to a potential cash payment of up to C$0.2120 per CVR.
• Apoena Mines (EPP Complex), Brazil: The project reports Proven & Probable Mineral Reserves of 221,687 ounces of gold (7,560,412 tonnes at 0.91 g/t Au) with an effective date of October 31, 2023. The post-tax Net Present Value (NPV) is estimated at US$91.38 million at a 10% discount rate. The Life of Mine (LOM) is projected for 4 years (2024-2027).
• Almas Project, Brazil: The project reports total Proven & Probable Mineral Reserves of 674 thousand ounces of gold (19,709 thousand tonnes at 1.07 g/t Au) as of December 31, 2024, supporting a 10-year LOM (2025-2034). The after-tax NPV is estimated at US$393 million at a 5% discount rate. Commercial production at the Paiol deposit began in Q4 2023, producing 54,003 ounces of gold in 2024.
• Era Dorada Gold Project, Guatemala: An Initial Assessment for this newly acquired project (formerly Cerro Blanco) reports Indicated Mineral Resources of 1,901 thousand ounces of gold (6,349 thousand tonnes at 9.31 g/t Au) and 6,439 thousand ounces of silver (6,349 thousand tonnes at 31.54 g/t Ag) as of December 31, 2024. The after-tax NPV is estimated at US$485.5 million at a 5% discount rate, with a projected LOM of 17 years at a production rate of 1,500 tonnes per day.

Sentiment

Score: 8

Explanation: The filing presents a very strong overall positive outlook for Aura Minerals, driven by significant mineral reserves and resources across its key gold projects, coupled with robust economic assessments. While operational and permitting challenges are noted for individual projects, the combined portfolio demonstrates substantial growth potential and financial viability.

Positives

• Apoena Mines reports Proven & Probable Mineral Reserves of 221,687 ounces of gold, with a post-tax NPV of US$91.38 million.
• Apoena's average metallurgical recovery of 93.5% was confirmed in 2022, and successful infill drilling connected the Upper Trap zone between Nosde and Lavrinha mines, adding resources.
• Almas Project reports total Proven & Probable Mineral Reserves of 674 thousand ounces of gold, with an after-tax NPV of US$393 million.
• Almas Project's Paiol deposit initiated commercial production in Q4 2023 and consistently met production targets, producing 54,003 ounces of gold in 2024.
• Almas Project benefits from a reduced corporate income tax rate of 15% due to SUDAM incentives and has a 30% female workforce.
• Era Dorada Gold Project reports Indicated Mineral Resources of 1,901 thousand ounces of gold and 6,439 thousand ounces of silver, with an after-tax NPV of US$485.5 million.
• Era Dorada boasts high gold (96%) and silver (85%) metallurgical recoveries and a comprehensive, integrated infrastructure plan.
• The local community in Guatemala is favorable to the Era Dorada underground mine development, and a significant contingent of Guatemalan-trained labor is available.

Negatives

• Apoena's Pau-a-Pique Mine operations were suspended in August 2022 due to geotechnical issues and below-expectation economics.
• Apoena's historical plant operation (2013-2014) had lower feed content and recoveries than initially predicted.
• Apoena's QA/QC review noted low precision in pulp re-assays and high variability in coarse check assays, indicating a nugget effect.
• Almas Project's process plant throughput (4,300 tpd) has not yet reached its design capacity (5,479 tpd), and gold recovery (90%) is 2% below the design value (92%).
• Almas Project's cut-off grade increased by approximately 30% since the previous report due to rising production costs.
• Almas Project's QP noted that some QA/QC insertion rates were below defined protocols and identified data dispersion in RC field duplicates.
• Era Dorada's Initial Assessment does not support Mineral Reserves, as a pre-feasibility or Feasibility Study is required.
• Era Dorada faces significant challenges with high-temperature groundwater and thermal gradients, potentially requiring higher dewatering rates than currently planned.
• Era Dorada's cost of grid power is based on a market survey, not an actual power supply agreement, introducing uncertainty.

Risks

• Apoena Mines: Volatility and uncertainties associated with gold selling price and OPEX costs.
• Apoena Mines: Need for new environmental intervention authorizations (vegetation suppression) for pit expansion.
• Apoena Mines: Potential for geotechnical issues (Pau-a-Pique suspension).
• Apoena Mines: Nugget effect in gold distribution affecting assay precision.
• Almas Project: Sensitivity to metal prices, head grade, and metallurgical recovery.
• Almas Project: Potential for further increases in operating costs and cut-off grades.
• Almas Project: Delays in infill drilling and obtaining operating licenses for Cata Funda and Vira Saia.
• Almas Project: Exceeding permitted pit dewatering rates.
• Almas Project: Community concerns due to proximity of Cata Funda to Almas.
• Era Dorada Gold Project: Hot water management and dewatering challenges, potentially requiring higher dewatering rates and additional water treatment/injection capacity.
• Era Dorada Gold Project: Socio-political resistance to mine development in Guatemala, despite local community favorability.
• Era Dorada Gold Project: Uncertainty in tonnages and grades due to reliance on Inferred Resources in the mine plan.
• Era Dorada Gold Project: Potential for higher power costs if market survey estimates are not realized in actual agreements.
• Era Dorada Gold Project: Delays in obtaining permit amendments and new EIAs/permits for power lines, increased processing rates, and reinjection.
• Era Dorada Gold Project: Water quality issues (high iron content) could cause well fouling for injection wells.
• Era Dorada Gold Project: Need for further geochemical/geotechnical studies for waste rock and tailings.

Future Outlook

Aura Minerals plans for proposed sale of securities to the public as soon as practicable after the F-1 Registration Statement becomes effective. Apoena Mines' Life of Mine (LOM) is projected until 2027, with plans to increase investments in exploration to extend mine lifespan further and evaluate crushing expansion for increased throughput. Almas Project's LOM extends to 2034, with Cata Funda and Vira Saia deposits scheduled to complement production in later years, and Aura anticipates achieving 92% gold recovery in 2025. Era Dorada Gold Project has a projected LOM of 17 years at a production rate of 1,500 tonnes per day, with plans for detailed engineering, phased construction, and ongoing exploration to expand resources.

Management Comments

• "Recently it was decided to increase investments in exploration to extend the mine's lifespan."

Industry Context

Aura Minerals Inc. is a public company listed on TSX, B3, and OTCQX, operating gold and copper projects in Honduras, Brazil, and Mexico, with exploration projects in Brazil, Guatemala, and Colombia. Apoena Mines is located in the Aguape Gold Belt, a region with historical gold mining, and is Aura's third project in this specific region of Brazil. Almas Project is situated in the Almas Greenstone Belt, a region known for its gold mineralization, and Aura is a mid-tier gold and copper producer. Era Dorada Gold Project is a classic hot springs-related, low-sulfidation epithermal gold-silver deposit, typical of the active Central American Volcanic Arc.

Comparison to Industry Standards

• Apoena's plant operational cost (US$11-12/t processed) is consistent with industrial practices for operations with similar operating design and scale.
• Apoena's QA/QC protocols generally meet industry best practices, but some issues related to precision and blank consistency were noted.
• Almas Project's QA/QC program aligns with industry best practices, though some QC insertion rates are below defined protocols.
• Era Dorada's sampling preparation, security, analytical procedures, and quality control protocols are consistent with generally accepted industry best practices.

Management Changes

Corporate Governance

Related Party Transactions

• Apoena Mines: A 2% Net Smelter Return (NSR) royalty is payable to Iraj, a company associated with Santa Elina Group, on gold ounces produced from the Project with respect to up to 1,000,000 collective ounces of gold, and thereafter, a 1% NSR.
• Almas Project: A 1.2% NSR royalty is payable to Minerao Santa Elina Indstria e Comrcio S.A. (Santa Elina) on revenue from the sale of any mineral production from the Paiol and Cata Funda deposits.
• Almas Project: A 2.5% NSR royalty is payable to Mineradora Santo Expedito Ltda. and Terra Goyana Mineradora Ltda. for production from the Vira Saia deposit.

Stakeholder Impact

• Shareholders: Potential for increased value due to positive economic assessments, significant mineral resources and reserves, and extended mine lives across key projects. The issuance of CVRs provides additional potential cash payments.
• Employees: Positive impact through job creation, particularly in Brazil and Guatemala, with a focus on local hiring and training. Almas Project reports a 30% female workforce.
• Customers: Assurance of continued gold and silver supply from multiple operating and developing projects.
• Suppliers: Increased demand for goods and services due to ongoing operations, construction, and exploration activities across the projects.
• Creditors: Enhanced financial stability and project viability may improve creditworthiness.
• Local Communities: Positive impact through job creation, income generation, tax collection, and socio-environmental programs in Brazil. In Guatemala, local community favorability to mine development is noted, but potential socio-political opposition remains a risk requiring proactive management.

Next Steps

• Aura Minerals Inc. (F-1/A): Proposed sale of securities to the public as soon as practicable after the effective date of the Registration Statement; filing of a further amendment for effectiveness.
• Apoena Mines: Increase investments in exploration to extend the mine's lifespan; evaluate crushing expansion for increased throughput; obtain environmental authorizations for pit expansion.
• Almas Project: Improve material tracking system for stockpiles; undertake close follow-up in infill drilling programs for Cata Funda and Vira Saia; closely follow up on operating licenses and mining concessions for Cata Funda and Vira Saia; review future expansion projects viability; continue to track operating costs closely; review grinding circuit, primary grind size, and mineralogical analysis; regularly review required infrastructure; monitor the Brazilian energy market; advance the study of the Tailings Storage Facility (TSF) to the detailed design phase; continue permitting for pits and water discharge; formalize management systems for environmental and social aspects; continue active community engagement; enhance cost tracking and financial planning.
• Era Dorada Gold Project: Conduct additional drilling to increase resources and improve geological understanding; review mineral resource classification and grade distributions; characterize and model geotechnical parameters; implement a comprehensive brownfields exploration program; optimize the mine plan; implement power generation in the cooling of mine water; conduct a mining study detailing mining dilution; establish detailed groundwater and dewatering control; develop a detailed mining operating plan; complete detailed engineering for site infrastructure; submit final permitting documentation; conduct detailed geochemical testing for waste rock and tailings; develop a phased construction plan; maintain proactive communication with local communities and stakeholders; implement a robust risk mitigation plan for infrastructure development; refine cost estimates to Class 5 level or higher; evaluate project economics under different scenarios; optimize project scheduling; conduct a Pre-Feasibility Study (PFS) or Feasibility Study (FS) for Mineral Reserve certification; use the current capital structure and cost estimates to support investment discussions; establish early procurement strategies and capital budgeting systems; incorporate local tax regimes and financing structures; evaluate alternative dewatering technologies; implement a continuous monitoring strategy for gold price fluctuations.

Key Dates

Recommendation

Keywords

Gold, Mining, Mineral Resources, Mineral Reserves, Gold Production, Metallurgy, Environmental Permitting, NPV, CAPEX, OPEX, Brazil, Guatemala, Apoena, Almas Project, Era Dorada, Epithermal, Low-Sulfidation, Underground Mining, Open Pit, Dewatering, Tailings, Contingent Value Rights, SEC Filing