A Mining Feasibility Study Has an Expiration Problem

Metal prices, energy, labor, exchange rates, and permits can age a project model quickly.

Why this matters

The tempting shortcut is to treat one visible number, label, or feature as the whole decision. That makes a clean headline, but it hides the conditions that determine whether the conclusion travels to a different build, market, device, or person. The primary source below establishes the factual boundary; the recommendation here is an editorial interpretation of that boundary.

Use a repeatable check

Record the study date, price deck, reserve basis, capex, contingency, permits, and financing assumptions before comparing projects. Record the date and source beside the result. If the underlying product, rule, filing, or guidance changes, update the conclusion rather than silently carrying the old answer forward.

What not to claim

Do not turn a feature into a guarantee, a scenario into a forecast, or one observation into a universal rule. Label estimates and judgments, preserve the assumptions, and give readers enough information to repeat the check themselves.

Primary source

• US SEC mining property disclosure rules

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