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Mineral resource classification is the classification of mineral deposits based on their geologic certainty and economic value. Mineral deposits can be classified as: * Mineral resources that are potentially valuable, and for which reasonable prospects exist for eventual economic extraction. * Mineral reserves or Ore reserves that are valuable ''and'' legally and economically and technically feasible to extract In common mining terminology , an "ore deposit" by definition must have an 'ore reserve', and may or may not have additional 'resources'. Classification, because it is an economic function, is governed by statutes, regulations and industry best practice norms. There are several classification schemes worldwide, however the Canadian CIM classification (see NI 43-101), the Australasian (Joint Ore Reserves Committee Code ) (JORC Code), the South African Code for the Reporting of Mineral Resources and Mineral Reserves (SAMREC) and the “chessboard” classification scheme of mineral deposits by H. G. Dill are . ==Mineral resources== A 'Mineral Resource' is a concentration or occurrence of material of intrinsic economic interest in or on the earth's crust in such form, quality and quantity that there are reasonable prospects for eventual economic extraction. Mineral Resources are further sub-divided, in order of increasing geological confidence, into inferred, Indicated and measured Categories. ''Inferred Mineral Resource '' is that part of a mineral resource for which tonnage, grade and mineral content can be estimated with a low level of confidence. It is inferred from geological evidence and assumed but not verified geological/or grade continuity. It is based on information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes which may be of limited or uncertain quality and reliability. ''Indicated resources'' are simply economic mineral occurrences that have been sampled (from locations such as outcrops, trenches, pits and drillholes) to a point where an estimate has been made, at a reasonable level of confidence, of their contained metal, grade, tonnage, shape, densities, physical characteristics.〔 ''Measured resources'' are indicated resources that have undergone enough further sampling that a 'competent person' (defined by the norms of the relevant mining code; usually a geologist) has declared them to be an acceptable estimate, at a high degree of confidence, of the grade, tonnage, shape, densities, physical characteristics and mineral content of the mineral occurrence. Resources may also make up portions of a mineral deposit classified as a mineral reserve, but: *Have not been sufficiently drilled out to qualify for Reserve status; or *Have yet to meet all criteria for Reserve status〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mineral resource classification」の詳細全文を読む スポンサード リンク
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