Minerals and resource use

Objective: Explain ore and nonrenewable resource, distinguish their meanings, and apply them to a described case.

Ore: Ore is material containing valuable substances in concentrations that can be economically extracted under current conditions. Nonrenewable resource: A nonrenewable resource is replenished too slowly to replace human use on relevant timescales. A mineral deposit's economic usefulness changes with technology, prices, and environmental or regulatory conditions. Extraction and processing create material flows much larger than the final product alone. Waste management depends on physical stability and chemical behavior at the site. Recycling can reduce virgin-material demand but requires collection and processing and rarely recovers everything perfectly. Life-cycle comparisons must deliver a comparable service and use consistent boundaries. Application: A deposit becomes workable when processing costs and prices permit extraction. This most directly illustrates ore. A metal deposit forms much more slowly than it is mined. This most directly illustrates nonrenewable resource.

Objective: Explain mining disturbance and tailings, distinguish their meanings, and apply them to a described case.

Mining disturbance: Mining can alter land, habitats, drainage, and exposure depending on the method and site. Tailings: Tailings are residual materials left after valuable components are separated from mined material. A mineral deposit's economic usefulness changes with technology, prices, and environmental or regulatory conditions. Extraction and processing create material flows much larger than the final product alone. Waste management depends on physical stability and chemical behavior at the site. Recycling can reduce virgin-material demand but requires collection and processing and rarely recovers everything perfectly. Life-cycle comparisons must deliver a comparable service and use consistent boundaries. Application: An extraction site changes nearby slopes and drainage. This most directly illustrates mining disturbance. A processing operation stores fine-grained waste in a managed facility. This most directly illustrates tailings.

Objective: Explain material recycling and life-cycle perspective, distinguish their meanings, and apply them to a described case.

Material recycling: Recycling recovers materials for further use but involves collection, energy, and losses. Life-cycle perspective: A life-cycle perspective examines impacts from extraction through processing, use, and end-of-life. A mineral deposit's economic usefulness changes with technology, prices, and environmental or regulatory conditions. Extraction and processing create material flows much larger than the final product alone. Waste management depends on physical stability and chemical behavior at the site. Recycling can reduce virgin-material demand but requires collection and processing and rarely recovers everything perfectly. Life-cycle comparisons must deliver a comparable service and use consistent boundaries. Application: Recovered metal is processed into a new product. This most directly illustrates material recycling. A comparison includes both manufacturing and disposal effects. This most directly illustrates life-cycle perspective.