Mineral Resources Energy Resources-coal, oil, natural gas, uranium, geothermal energy Metallic mineral resources-iron, copper, aluminum, gold, silver.

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Presentation transcript:

Mineral Resources Energy Resources-coal, oil, natural gas, uranium, geothermal energy Metallic mineral resources-iron, copper, aluminum, gold, silver Nonmetallic mineral resources-salt, gypsum, clay, sand, phosphates, water, soil

Metallic Mineral Resources Vocabulary: Ore—A metal-yielding material that can be economically extracted. Economically Depleted—when cost of finding, extracting, transporting and processing remaining deposits exceed the returns.

Types of Mining Minerals Subsurface mining—removal of deep deposits of minerals (Ex. Coal mining)

Types of Mining Minerals Surface mining—used to retrieve shallow mineral deposits; often produces tons of waste and unusable product. * Overburden—soil and rock which lies over shallow mineral deposits. Must be removed. * Spoil—waste material

Types of Mining Minerals Types of Surface Mining: Dredging—scrape up mineral deposits underwater using chain buckets and draglines

Types of Mining Minerals Types of Surface Mining: Open-pit mining—dig a large hole to remove ores

Types of Mining Minerals Strip mining— overburden is removed in strips.  Area Strip mining— terrain is flat, overburden is stripped away and mineral deposit is removed by power shovels then trench is filled with overburden; Spoil banks are left forming a wavy series of hills

Types of Mining Minerals Strip mining— overburden is removed in strips.  Contour Strip mining— terrain is hilly. Terraces are cut into the side of the hill; overburden is removed and mineral is extracted. Overburden from each terrace dumped into the one below.

Types of Mining Minerals Mountaintop Removal—mountain tops are completely removed. Debris is dumped into the valleys.

Environmental Effects of Mining Requires a huge amount of energy Scarring and disruption of land Fires in coal mines Land subsidence Erosion of spoil heaps by water and wind Air and water pollution Rainwater carries toxins to nearby streams Other mine waste—radioactive uranium compounds, lead, mercury, arsenic (gold mines) and cadmium

Mining Legislation Surface Mining Control and Reclamation Act— Requires mining companies to restore most surface mined land so it can be used for the same purpose as it was before it was mined. Originally passed in Amended several times. Regulates coal mining.