Lithosphere, mining and energy-resource decisions

Lithosphere, mining and energy-resource decisions

The lithosphere is Earth's solid outer part and contains minerals, ores, rocks and energy resources. A mineral is a naturally occurring inorganic solid with a characteristic composition and structure. An ore is a deposit containing a useful mineral at a concentration where extraction can be economically worthwhile; not every mineral deposit is an ore. Mining decisions involve chemistry, geology, water, energy, employment, health and rehabilitation. A credible answer separates a resource's benefit from its cost and names the evidence that would test a claim, such as water-quality data, dust monitoring or the concentration of the target mineral.

Work it through

A copper-containing rock becomes an ore only if copper can be recovered at a useful concentration with acceptable cost and impact. A proposed mine should identify the valuable material, the separation or extraction step, likely tailings or water risks and a rehabilitation plan. Saying that mining is simply good or bad skips the required evidence and trade-offs.

Mastery target

Explain the difference between a mineral and an ore, and evaluate one mining or energy-resource decision using a benefit, cost, stakeholder and measurable indicator.