Mining and quarrying: how the industry works
Mines extract useful material from deposits and separate it from waste. Geology, grade, recovery, access, processing capacity, and closure obligations determine whether a deposit becomes a viable business.
Scope and segments
Covers extraction and initial processing of metal ores and industrial minerals, including quarrying. Oil and gas extraction is a separate profile. Mining methods and permits vary by deposit and jurisdiction; environmental sources below include U.S. and regional guidance.
- Surface mines and quarries
- Remove material accessible from the surface. Overburden, pit geometry, haul distance, and waste movement affect economics.
- Underground mines
- Access deeper deposits through shafts, declines, or other workings. Ground conditions, ventilation, and development constrain output.
- Processing and concentration
- Separates valuable material using a deposit-specific route. A mine may sell ore, concentrate, or a more refined product.
10 companies to know
Illustrative mining companies spanning bulk commodities, precious metals, copper, and other industrial minerals across several regions. This is not a ranking by reserves, output, or revenue; shared ventures are not counted as additional companies.
Listed alphabetically. Names link to official sources. Checked . How we select examples.
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Operates copper mines in Chile, including Los Pelambres and Centinela. Its mining division connects ore extraction and processing with the infrastructure required to bring copper products to market.
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Barrick Mining Corporation
Gold and copper mining
Operates gold and copper mining businesses across several countries, including joint ventures. Its portfolio connects mineral-resource development with mine operations, processing, and long-term investment decisions.
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Produces iron ore, steelmaking coal, and copper through open-cut and underground operations. Its diversified assets connect different ore bodies and processing requirements with industrial commodity markets.
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Operates mining and processing businesses producing copper, cobalt, molybdenum, tungsten, niobium, and phosphates. Its geographic portfolio connects different mineral deposits with specialized extraction and processing capabilities.
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Freeport-McMoRan
Copper mining and processing
Operates copper mines using routes including concentration, leaching, and solvent extraction with electrowinning. Its South American operations show how ore characteristics influence the form of copper sold.
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Produces metals and minerals and also markets physical commodities. Its industrial and trading businesses connect extraction and processing assets with transport, customer requirements, and commodity markets.
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Newmont
Gold and associated metals
Mines gold, copper, silver, and other metals through a portfolio of operations. Its business connects mineral exploration and reserve development with extraction, processing, and mine-lifecycle management.
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Produces commodities including iron ore, aluminium, copper, and lithium. Its portfolio connects mining and mineral processing with different industrial supply chains and the infrastructure each requires.
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Grupo México-controlled producer with mining, smelting, and refining facilities in Peru and Mexico. Its operations connect ore extraction with concentrate production and further conversion into copper products.
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Produces iron ore and pellets alongside copper and nickel, with associated logistics operations. Its business connects mineral extraction and processing with transport infrastructure and industrial customers.
How it works
Follow the main sequence. Actual operating models may combine or outsource individual stages.
- 1
Evaluate and develop
Characterize the deposit, test processing behavior, plan access and waste management, obtain approvals, and build infrastructure.
- 2
Extract and move
Drill, blast, cut, or otherwise recover material; separate ore from waste and transport it to stockpiles or processing.
- 3
Concentrate and recover
Crush, grind, sort, or use other appropriate separation processes. Recovery measures how much contained valuable material becomes product.
- 4
Sell and manage liabilities
Grade and ship product under customer terms while managing water, waste rock, tailings, rehabilitation, and eventual closure.
How money moves
- Revenue or funding unit
- A tonne of ore or concentrate, or a unit of payable metal/mineral, adjusted for grade, impurities, treatment charges, and contract terms.
- Who pays
- Smelters, refiners, manufacturers, traders, and construction-material users. Contained metal is not always fully payable metal.
Main costs
- Extraction and movement
- Development, drilling, blasting, loading, haulage, and waste removal vary with depth, geometry, and ground conditions.
- Processing and stewardship
- Comminution, reagents, energy, water management, tailings storage, maintenance, and rehabilitation affect lifecycle economics.
Assets and investment
Access development, processing plants, power, water, transport, and waste facilities require investment before dependable revenue. A deposit can be valuable yet uneconomic to develop.
The cash cycle
Ore stockpiles, product awaiting assay or shipment, spare parts, and customer settlement delays tie up cash. Development and closure spending are not captured by short-run production margins.
The economic mechanism
Recovered output depends on tonnes processed, grade, and recovery. A fall in grade can require more rock, energy, and waste handling for the same product quantity. Throughput and recovery can also trade off, so maximizing tonnes alone may reduce value.
Inside the operation
Measures that matter
| Measure | What it measures | Why it matters |
|---|---|---|
| Head grade | Valuable material concentration in feed entering the process. | Shows how much potential product is carried by each tonne. |
| Recovery | Recovered valuable material divided by valuable material in the feed. | Connects metallurgy to output; it is not the same as concentrate grade. |
| Stripping ratio | Waste moved relative to ore mined, with units and basis stated. | Reveals a key surface-mining cost driver. |
Sources: [2]. See source scope below.
What shapes the industry
A mineral resource estimate is not a promise of profitable production. Commodity prices, processing behavior, infrastructure, environmental obligations, and financing can change the economic boundary of a deposit.
Mines are geographically fixed, while customers and prices may be global. Nearby infrastructure can transform project economics, but a larger plant cannot remove geological uncertainty. Production schedules also affect which grades are mined now and which remain for later years.
Sources: [1]. See source scope below.
Who it connects to
These relationships describe typical flows. They are not a list of every supplier or customer.
Buys from / depends on
- Electric utilities
Power processing and other mine systems.
- Oil and gas
Supply fuels used by mobile equipment and logistics.
Substitutes and alternatives
- Recycled materials
Can replace some primary mineral demand, depending on collection, purity, product requirements, and recovery economics.
Grade and recovery are separate levers
Illustrative calculation
The inputs below are hypothetical. They explain a mechanism and are not industry benchmarks or a forecast.
Assumptions
- Illustrative metal ore: 100,000 tonnes processed at 1% grade and 90% recovery.
- A second case has 0.8% grade at the same tonnes and recovery.
Calculation
- First case: 100,000 × 0.01 × 0.90 = 900 tonnes recovered metal.
- Second case: 100,000 × 0.008 × 0.90 = 720 tonnes recovered metal.
The same processing throughput produces 20% less recovered metal. The calculation excludes payability, refining losses, and changes in cost.
What changes when…
Ore hardness increases while the plant equipment is unchanged.
- Grinding may require more energy per tonne or processing throughput may fall.
- The mine must reconcile material delivery with the slower processing constraint.
- Blending or process changes can help, but recovery and product quality must be monitored alongside throughput.
What to watch
- Energy per tonne
- Plant throughput and recovery
- Stockpile quality and inventory
A qualitative scenario based on the operating model, not a quantitative prediction.
Risks and misconceptions
- Geological or recovery shortfall
- Actual ore quality or processing behavior differs from the plan, reducing saleable output or increasing cost.
- Safety and ground instability
- Ground failure, equipment incidents, or inadequate controls can harm workers and halt production.
- Water or tailings failure
- Waste facilities and drainage create long-lived environmental and safety obligations extending beyond the last sale.
Sources: [2] [3]. See source scope below.
Common misconceptions
- A large deposit is automatically a profitable mine.
- Grade, recovery, access, costs, permissions, infrastructure, and closure obligations determine economic viability.
Sources and scope
Primary references anchor the factual mechanisms below. Operating models, relationship choices, and worked examples are editorial synthesis. Linked sources do not constitute endorsement.
- How do we extract minerals?U.S. Geological Survey
How deposit location, shape, strength, grade, cost, and price influence mining method.
- EIA Technical Review Guidelines: Non-Metal and Metal Mining Volume IU.S. Environmental Protection Agency
Mine lifecycle, processing, environmental impacts, and waste-management planning; 2011 technical guidance.
- Report to Congress: Wastes from the Extraction and Beneficiation of Metallic Ores, Phosphate Rock, Asbestos, Overburden from Uranium Mining and Oil ShaleU.S. Environmental Protection Agency
Definitions and mechanisms of ore beneficiation, tailings, and extraction wastes; historical technical reference.
Process descriptions draw on the cited primary sources. Business-model interpretation is editorial synthesis; worked-example figures are illustrative assumptions, not industry benchmarks. Regulation and commercial arrangements vary by jurisdiction.
From understanding to operating
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