A mining feasibility study is the most comprehensive technical and economic analysis carried out before a mine is built. It answers a simple but decisive question: can the deposit be mined profitably, safely and responsibly?
A mining project is never approved on the strength of good drill results alone. Between the discovery of a mineralized zone and the decision to build a mine, it must be demonstrated, with solid numbers, that the project holds up on every level.
That is exactly the purpose of the feasibility study. It brings together geology, engineering, economics, environment and regulations in a single reference document that will support the investment decision.
A key milestone in the life of a mining project
The feasibility study comes at a specific point in mining development. It generally follows the preliminary economic assessment (PEA) and the prefeasibility study, which provide increasing levels of detail and confidence.
Each of these stages refines the understanding of the project. The feasibility study represents the most advanced level: cost estimates are precise, technical choices are finalized and assumptions are supported by verified data.
It is also at this stage that the project becomes credible in the eyes of investors, lenders and authorities. Without a solid feasibility study, financing the construction of a mine is extremely difficult.
The central role of geological data
Every feasibility study is built first and foremost on a reliable geological model. The quality of the drilling, assays, database and interpretation directly determines the credibility of the results.
The geologist plays an essential role here. They validate the continuity of the mineralization, verify the grades, control data quality and make sure the model truly reflects the reality of the deposit.
A misinterpretation at this stage can distort the entire study. Geological rigour is not a detail: it is the foundation on which everything else rests.
What a feasibility study contains
A feasibility study covers every aspect of the future project: mining method, mine plan, ore processing, metallurgy, infrastructure, workforce, tailings management, and site closure and rehabilitation.
It also includes a detailed economic analysis: capital costs, operating costs, production schedule, metal price assumptions, profitability and sensitivity to market variations.
Finally, it addresses the environmental, social and regulatory dimensions, which are now inseparable from the viability of a mining project.
From resources to mineral reserves
One of the major outcomes of a feasibility study is the conversion of mineral resources into mineral reserves. This is a significant change of status for a project.
Reserves correspond to the portion of the deposit whose extraction has been demonstrated to be viable, taking into account the technical, economic, environmental and legal factors studied.
This conversion is governed by recognized standards, such as National Instrument 43-101 in Canada, which ensure the transparency and quality of the information disclosed to the public and the markets.
Reducing risk before investing
Building a mine requires considerable investment, often several hundred million dollars. The feasibility study exists precisely to reduce uncertainty before committing these amounts.
It identifies the technical, economic and environmental risks of the project and proposes measures to manage them. It also makes it possible to compare different scenarios and select the most realistic one.
A project that successfully passes this stage is not risk-free, but its risks are known, measured and managed. That is what makes all the difference for decision-makers.
A multidisciplinary team effort
A feasibility study brings together many specialists: geologists, mining engineers, metallurgists, environmental experts, economists and community relations professionals.
Consistency between these disciplines is essential. The mine plan must respect the geological model, the processing must match the nature of the ore, and the costs must reflect the reality on the ground.
Independent geological support often helps validate key assumptions and strengthen the credibility of the entire study.
Preparing your feasibility study properly
A mining feasibility study is not a simple formality. It is the analysis that transforms geological potential into a financeable and buildable project, or reveals that it is still too early to move forward.
Its success depends on the quality of the work done upstream: reliable data, a rigorous geological model, well-estimated resources and realistic assumptions.
P.J Lafleur Géo-Conseil supports companies in validating geological data, interpreting results and preparing the steps leading to technical studies.
To discuss your mining project in Quebec, contact P.J Lafleur Géo-Conseil today.