Short answer: Major mines are the operations that define a commodity, a region or an era of industry: the largest copper mine, the richest iron ore deposit in the Arctic, the salt flat that supplies a large share of the world’s lithium. This section profiles them one by one: where they are, who runs them, how they work and why they matter beyond their own fence line.
A handful of mines carry an outsized share of the world’s supply of certain materials. When one of them has a strike, a drop in ore grade or a dispute over water, the effect can reach manufacturers and commodity markets on other continents. Understanding these operations is the most direct way to understand how the material world is actually supplied.
What makes a mine “major”
Size is the obvious measure, but it is not the only one. A mine can be major because of:
- Output. Escondida in Chile produces more copper than any other single mine in most years.
- Quality. Mary River on Baffin Island mines iron ore rich enough to ship with little processing.
- Concentration. A few deposits in the Democratic Republic of the Congo supply most of the world’s cobalt.
- Strategic weight. The Salar de Atacama is one of the lowest-cost lithium sources on Earth at a moment when batteries depend on it.
- Engineering. Diavik built dykes in an Arctic lake to reach diamonds beneath the water.
Each profile in this section states which of these measures it uses, because rankings change with the year and the definition.
The mines in this section
Escondida, Chile
The world’s largest copper mine by production, operated by BHP in the Atacama Desert more than 3,000 metres above sea level. Its story is one of scale and of water: it now relies mainly on desalinated seawater pumped up from the coast. Read the full profile: Escondida Mine: The Copper Giant of the Atacama.
Salar de Atacama, Chile
A salt flat whose brine is pumped into evaporation ponds and refined into lithium chemicals for batteries. It is central to the global lithium market and to the debate over how lithium extraction affects a fragile desert water system. Read more: Salar de Atacama: Lithium Brine Beneath the Salt Flat.
Mary River (Baffinland), Canada
An iron ore mine on northern Baffin Island whose ore is so rich it needs little processing, and whose output leaves by ship only during the short Arctic shipping season. A case study in how distance and community consent set the pace of a mine. Read more: Baffinland Mine: High-Grade Iron Ore in the Canadian Arctic.
The cobalt mines of the Congo
Most cobalt is a by-product of copper and nickel mining, and the Democratic Republic of the Congo dominates supply. Understanding cobalt means understanding copper, refining in China and the traceability of artisanal production. Read more: Cobalt Mines: Where the Battery Metal Comes From.
Diavik, Canada
A diamond mine built on an island in Lac de Gras in the Northwest Territories, where engineers held back the lake with dykes to mine the kimberlite beneath it. Now in the last stage of its life, its closure is as important as its production. Read more: Diavik Diamond Mine: Engineering on an Arctic Lake.
How to read a mine profile
Each profile opens with a short answer and an “At a glance” table: location, operator, commodity, mining method and the feature that defines the mine. The body explains how the mine works, what limits it and why it matters. Sources are listed at the end, so any figure can be checked against the company or the regulator that published it.
Mines change. Grades decline, expansions are approved or refused, ownership moves. When an operation changes in a way that affects what we have written, we update the profile.
Related sections
Some of the most remarkable mines appear under Extreme Mines, which covers records such as depth and the most unusual operations on Earth. The economic forces that decide whether a mine is built at all are covered in Mining & Economics, and the minerals that are becoming strategic in New Mining.
Frequently asked questions
What is the largest mine in the world?
It depends on the measure. By copper production, Escondida in Chile. By the size of the excavation, Bingham Canyon in Utah is often cited. Rankings by output, area, depth or reserves give different answers.
Which country has the most major mines?
Major mines are spread across several countries. Chile, Australia, Canada, China, Russia, Brazil, South Africa and the Democratic Republic of the Congo all host operations that are among the largest for at least one commodity.
Why do a few mines matter so much to world markets?
Because supply of some materials is concentrated in a small number of large operations. A disruption at one of them removes a noticeable share of world supply at once.
How does ResourceClips decide which mines to profile?
We choose mines that define a commodity, a region or a technology, or that illustrate a problem every mine faces, such as water, distance, closure or community consent.