What to examine in a pre-production mining project

A mining project before production is a set of claims about the ground and a plan to develop it. Evaluating one is an exercise in separating what has been demonstrated from what has been asserted. The industry has built a vocabulary and a set of rules for exactly this. Knowing them turns a glossy summary into a checklist. This is a framework for reading a project, not an endorsement of any particular one.

Every pre-production project presents itself well. That is the nature of promotion. The reader's job is to look past presentation to evidence, and the industry has made that easier than it first appears by codifying exactly what evidence should exist and who must vouch for it. Learning the terms is learning to ask the right questions in the right order. The questions do not concern price or upside. They concern what has been proven, by whom, and under which rules. This is that set of questions.

Inferred, indicated, measured Mineral estimates are classified by geological confidence, and the words are technical, not promotional. An inferred resource is the lowest confidence. It is estimated from limited sampling, enough to suggest tonnage and grade but not to rely on. An indicated resource is supported by sampling dense enough to assume continuity with reasonable confidence. A measured resource is the highest confidence, backed by closely spaced data. The progression from inferred to indicated to measured represents more drilling and more certainty. When a project cites a resource, the first question is which category, because the word carries the confidence.

Resources versus reserves There is a further distinction that matters. A resource is a quantity of mineral in the ground. A reserve is the part of a resource that has been shown to be economically and legally extractable under a defined plan. Reserves require more study than resources. A project may hold a large measured and indicated resource well before it can state reserves. Confusing the two overstates how far a project has advanced.

What a PEA is, and is not Early economic studies often take the form of a Preliminary Economic Assessment, or PEA. A PEA is a first-pass, scoping-level study of whether a project could be viable. It is useful, but it is preliminary by definition. It can include inferred material and carries wide error bars. A PEA is not a feasibility study, which is a far more detailed and rigorous basis for a development decision. Reading a PEA as if it were a feasibility study is a common and serious error. Treat it as a scoping tool.

Qualified Persons and the rules The estimates and studies in a serious project are not self-published opinion. They must be prepared or supervised by a Qualified Person, a credentialed professional with relevant experience, under a recognized reporting code. In the United States the Securities and Exchange Commission adopted modernized disclosure rules under Regulation S-K 1300. In Canada the standard is NI 43-101. These codes govern who can sign estimates and how they must be disclosed. A project reporting under them is accountable to a professional standard. The absence of a named Qualified Person is itself a finding.

Infrastructure proximity Geology can be excellent and a project still stall on logistics. So the framework must include infrastructure. How far to power, and what kind. How far to a railhead and to a deep-water port. What roads exist. Whether processing water and a workforce are available. Infrastructure proximity does not change the ore, but it changes whether the ore can be developed at a sensible cost. A deposit next to existing power, rail, and port is a fundamentally different proposition from an identical deposit in the remote interior.

The stages of study Projects advance through a recognized sequence of studies, and knowing the ladder places any single claim in context. A scoping study, often a Preliminary Economic Assessment, comes first. A prefeasibility study follows, tightening the estimates and the plan. A feasibility study is the most rigorous, detailed enough to support a construction decision. Each step narrows the error bars and raises the bar for the data behind it. When a project describes its stage, that word signals how much has actually been proven, and a careful reader matches the confidence of the resource category to the stage of the study.

People and track record Documents describe a project, but people build it. A due-diligence framework should look at who is involved and what they have done before. Relevant operating experience, a history of taking projects through permitting and into production, and named professionals accountable under a reporting code all reduce execution risk. This is not about personality. It is about whether the team has done the specific, difficult work of turning a resource into a mine before. A strong deposit with an inexperienced team and a modest deposit with a proven one are different risks, and the framework should say so.

Assembling the framework Read a pre-production project as a stack of questions. What is the resource, and in which confidence category. Has anything been converted to reserves. Is the economic study a scoping assessment or a feasibility study. Who is the Qualified Person and under which code. How close is the infrastructure. None of these questions asks about price or return. They ask what has been demonstrated. A project that answers them clearly, with named professionals and public records, has given you the material to judge it. One that cannot is telling you something too.