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  2. Mineral resource classification - Wikipedia

    en.wikipedia.org/wiki/Mineral_resource...

    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 ...

  3. McKelvey diagram - Wikipedia

    en.wikipedia.org/wiki/McKelvey_diagram

    Diagram as published by McKelvey in 1973 [1] Diagram as published by McKelvey in 1976 [2]. 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.

  4. PERC Reporting Standard - Wikipedia

    en.wikipedia.org/wiki/PERC_Reporting_Standard

    Figure showing the relationship between Exploration Results, Mineral Resources and Mineral Reserves. The exact definitions of key terms like 'Modifying Factors', 'Inferred'-, 'Indicated'- and 'Measured Mineral Resources' as well as 'Probable' or 'Proved Mineral Reserves' are documented in the PERC Reporting Standard. [1]

  5. Coeur Reports Healthy Increases in Combined Reserves and ...

    www.aol.com/2013/02/15/coeur-reports-healthy...

    Coeur Reports Healthy Increases in Combined Reserves and Measured and Indicated Resources COEUR D'ALENE, Idaho--(BUSINESS WIRE)-- Coeur d'Alene Mines Corporation (NYS: CDE) (TSX:CDM) today ...

  6. Mineral resource estimation - Wikipedia

    en.wikipedia.org/wiki/Mineral_resource_estimation

    An indicated mineral resource is that part of a Mineral Resource for which quantity, grade or quality, densities, shape and physical characteristics, can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters, to support mine planning and evaluation of the economic viability ...

  7. South African Mineral Reporting Codes - Wikipedia

    en.wikipedia.org/wiki/South_African_Mineral...

    Once further scientific and engineering investigation has been performed and it can be demonstrated that there are "reasonable prospects for eventual economic extraction", [2] then a Mineral Resource Report can be published or declared. There are three sub-categories of Mineral Resource within the Code, namely Measured, Indicated, and Inferred.

  8. Proven reserves - Wikipedia

    en.wikipedia.org/wiki/Proven_reserves

    Proven reserves (also called measured reserves, 1P, and reserves) is a measure of fossil fuel energy reserves, such as oil and gas reserves and coal reserves. It is defined as the "quantity of energy sources estimated with reasonable certainty, from the analysis of geologic and engineering data, to be recoverable from well established or known ...

  9. Latent and observable variables - Wikipedia

    en.wikipedia.org/wiki/Latent_and_observable...

    Quality of life is a latent variable which cannot be measured directly so observable variables are used to infer quality of life. Observable variables to measure quality of life include wealth, employment, environment, physical and mental health, education, recreation and leisure time, and social belonging.