Copper Mining: News, Analysis and Market Coverage

US copper production has not stopped but has declined substantially from its historical peak due to depletion of high-grade ore at major deposits and rising production costs at ageing operations. The Kennecott Bingham Canyon mine in Utah remains one of the world's largest producing copper mines, operated by Rio Tinto. Arizona hosts several major US copper operations including Freeport-McMoRan's Morenci mine. US copper output represents a modest share of global production compared to Chile and Peru. Environmental permitting timelines and water availability in arid producing regions are constraints on new US copper mine development.

Chile accounts for approximately 25 to 30 percent of global copper mine production, making it by far the world's largest copper-producing nation. Output comes predominantly from large porphyry copper deposits in the Atacama and Andes regions, including Escondida (BHP), Collahuasi (Anglo American and Glencore), and Codelco's multiple state-owned operations. Copper royalties and taxes from mining are a significant component of Chile's government revenue. Chilean production disruptions, whether from labour disputes, water restrictions, or policy changes, can move global copper prices due to the country's concentrated share of world supply.

Porphyry copper deposits are mined primarily by open pit methods due to their large surface footprint and relatively uniform grade distribution. Ore is blasted, loaded onto haul trucks, and transported to a primary crusher before being ground in large semi-autogenous and ball mills. The ground ore is processed through froth flotation to separate copper and molybdenum sulphide minerals into a concentrate. The concentrate is then smelted and refined to produce copper cathode. High-sulphide oxide ore zones are often processed by heap leach and solvent extraction-electrowinning to produce copper cathode directly without smelting.

A battery electric vehicle uses approximately 60 to 80 kilograms of copper, compared to 20 to 25 kilograms in a conventional internal combustion engine vehicle. The additional copper in electric vehicles is concentrated in the battery pack, power electronics, and electric motor windings. Charging infrastructure adds further copper demand: a fast-charging station uses significantly more copper than a domestic charger. The global electric vehicle fleet expansion represents a substantial incremental copper demand driver above and beyond existing industrial and construction applications.

Escondida in Chile, operated by a BHP-led consortium, is the world's largest copper mine by production volume, producing over one million tonnes annually from one of the largest porphyry copper deposits ever discovered. Collahuasi in northern Chile, operated by Anglo American and Glencore, is a major producer. Grasberg in Papua, Indonesia, operated by Freeport-McMoRan, is one of the world's largest copper and gold mines. Morenci in Arizona is the largest copper mine in North America. Codelco's Chuquicamata and El Teniente in Chile are among the world's longest-operating major copper mines.