Mineral Commodities

Mineral Commodities - Figure 1.2. Growth of the worlds...

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Unformatted text preview: Figure 1.2. Growth of the worlds population through history. Notice the sharp drop due to the Black Death that struck Europe in 1348, and the sharp rise that occurred in the nineteenth and twentieth centuries. From Craig, J.R., Vaughan, D.J., and Skinner, B.J., 2001, Resources of the Earth Origin, Use, and Environmental Impact, 3 rd Edition. Prentice-Hall, 520p. The periodic table Classification of Minerals Silicates Most important mineral group Comprise most of the rock-forming minerals Very abundant due to large amounts of silicon and oxygen in Earths crust Basic building block is the silicon-oxygen tetrahedron molecule Four oxygen ions surrounding a much smaller silicon ion Classification of Minerals Important nonsilicate minerals Several major groups exist including Oxides Sulfides Sulfates Native Elements Carbonates Halides Phosphates Mineral resources The endowment of useful minerals ultimately available commercially Mineral resources include Reserves already identified deposits (proven) Known deposits that are not yet economically or technologically recoverable (speculative) Mineral resources Ore A useful metallic mineral that can be mined at a profit Must be concentrated above its average crustal abundance Profitability may change because of economic changes Table 3-3. List of the common ore minerals. From Jensen, M.L., and Bateman, A.M., 1981, Economic Mineral Deposits, 3 rd Edition, Revised Printing. John Wiley & Sons, New York, 593p. MAGMA...
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Mineral Commodities - Figure 1.2. Growth of the worlds...

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