ENV100Y5 Lecture Notes - Lecture 6: Leachate, Open-Pit Mining, Mountaintop Removal Mining
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ENV100Y5 Full Course Notes
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Document Summary
Critical flow resources (effectively nonrenewable because of mismanagement: rate of withdrawal is > raw of renewal. Mineral = naturally occurring solid inorganic chemical elemnt or compound with a crystal structure, a specific chemical composition, and distinct physical properties. Oil is not a mineral (not solid) Metal = chemical element that is shiny, opaque, malleable, conducts heat and electricity. Mining = systematic removal of rock, regolith, or other materials for the purpose of extracting minerals of economic interest. Most minerals are widely spread in low conc. Deposit: entrations: natural occurrence of a resource. Grade: level of concentration of a resource. Ore: economically valuable material in a deposit. Gangue: waste rock and nonvaluable materials. Layers of soil and rock are removed to expose a resource: overburden = overlying soil and rock that is removed first. Mountaintop removal is an extension of stirpmining. Placer mining: uses running water and settling, commonly used for gold.
