Abstract
The Russian system of classification of ore reserves is defined; it includes five categories of reserves. Methods of estimating and designating the four main groups of ore deposits for the purpose of estimating reserves are described. Examples used include sedimentary marine iron, manganese, and bauxite deposits; residual limonitic iron ore, alluvial bauxite, magnetite skarn, copper-bearing sandstones, stratified copper-nickel sulfides, vein disseminated copper in secondary quartzite, lensing pyrite, hydrothermal ore vein, chromite, scheelite skarn, lateritic nickel ores, and placers. --M. Russell.
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