Knowledge / Mining & Geoscience / Resource Estimation

Resource Estimation

Resource Estimation: The only equation that produces a tonnage, and where each term comes from; Why unequal sample lengths cannot be averaged, and what support means; The economic boundary drawn on a model, and how it moves the tonnage.

All 6 articles are published. Each one states what it needs, what can be concluded with it, and what cannot — and every one stays marked DRAFT until it has had independent geological review.

1. Volume, density and tonnage publishedThe only equation that produces a tonnage, and where each term comes from.
2. Grade, compositing and support publishedWhy unequal sample lengths cannot be averaged, and what support means.
3. Cut-off grade publishedThe economic boundary drawn on a model, and how it moves the tonnage.
4. Contained metal, and how it is overstated publishedFrom grade to metal, through recovery, dilution and loss.
5. Uncertainty: precision is not evidence publishedThe same number from three data densities, and what the decimals do not tell you.
6. Resources vs reserves, and what GeaSpirit never claims publishedInferred, Indicated, Measured — a classification that belongs to a code, not to software.