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Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model.There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.
Quantitative mineral-resource assessments are defined as the numerical estimate of the amount, quality, and in some cases, value of undiscovered minerals (that is, metal or industrial mineral) present within a specified area (tract). Their purpose is to provide a framework for making decisions by governments or institutions concerning mineral ...
Mineral Resources are further sub-divided, in order of increasing geological confidence, into inferred, indicated and measured as categories. Inferred Mineral Resource is the part of a mineral resource for which quantity, grade (or quality) and mineral content can be estimated with a low level of confidence. It is inferred from geological ...
A mining feasibility study is an evaluation of a proposed mining project to determine whether the mineral resource can be mined economically. There are three types of feasibility study used in mining, order of magnitude, preliminary feasibility and detailed feasibility. [1]
A McKelvey diagram or McKelvey box is a visual representation used to describe a natural resource such as a mineral or fossil fuel, based on the geologic certainty of its presence and its economic potential for recovery. The diagram is used to estimate the uncertainty and risk associated with availability of a natural resource.
Giurco et al. (2009) [8] indicate that the debate about how to analytically describe resource depletion is ongoing. Traditionally, a fixed stock paradigm has been applied, but Tilton and Lagos (2007) [9] suggest using an opportunity cost paradigm is better because the usable resource quantity is represented by price and the opportunity cost of using the resource.
The reporting codes are, however, not entirely congruent in practice, in that NI 43-101 is more prescriptive in terms of the manner in which mineral exploration reporting is presented, although the content of the technical reports, and the scientific rigors to which the mineral resource classifications within them are put, are often very similar.
Logo of the PERC - PAN-EUROPEAN RESERVES + RESOURCES REPORTING COMMITTEE . The PERC Standard for Reporting of Exploration Results, Mineral Resources and Mineral Reserves (the ‘PERC Reporting Standard’) [1] sets out the minimum standards, as well as additional guidelines and recommendations for the Public Reporting of Exploration Results, Mineral Resources and Mineral Reserves within Europe.