Chuquicamata


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Chuquicamata

(cho͞o'kēkämä`tä), former town, Antofagasta region, N Chile, on the western slopes of the Andes. At an elevation of 10,435 ft (3,181 m), the location is the site of the world's largest copper mines. The extensive open-pit mining of the region dates to 1915. Smelting and flotation plants began operations in 1951; an expansion of refining plants in 1970 substantially increased copper output. In 2003, due to the expansion of the mine and environmental problems, the town was evacuated and its buildings removed; many residents moved to nearby Calama.

Chuquicamata

 

a city in northern Chile, in Antofagasta Province. Population, 28,800 (1966). Chuquicamata is situated at an elevation of approximately 3,000 m. It has a railroad station. Copper ores are mined and dressed and copper is smelted in the city.


Chuquicamata

 

the world’s largest copper deposit, located in northern Chile, in the Central Andes at an elevation of 2,840 m, 240 km northeast of the city of Antofagasta. The total geological reserves of commercial ores are estimated at about 900 million tons, with an average copper content of 0.99 percent (1978). Chuquicamata, a hydrothermal deposit of porphyry copper, is confined to a large meridional intrusion (20 km long and 3 to 4 km wide) of porphyritic monzonite. The commercial ores connected with the thick (more than 300 m) zone of oxidation form a steep stockwork that is 0.8 km wide and about 3 km long.

Three submeridional zones are distinguished in the Chuquicamata deposit: the western, the central, and the eastern zones. The western zone, which consists of copper-molybdenum ores, is 100 to 200 m wide and is the most intensively mineralized. It is composed of quartz-sericite rocks and quartzites; metalliferous minerals are represented (in addition to oxidized minerals) by pyrite, chalcocite, enargite, molybdenum, and chalcopyrite. The central zone, which consists of copper ores, is characterized by intensive kaolinization of porphyries and the development of chalcopyrite-chalcocite ores. The eastern zone consists of complex ores. The rocks are chloritized, and chalcopyrite is developed. Bornite, sphalerite, and galena are found less often.

The Chuquicamata deposit has been worked since 1915. By 1952, 4.6 million tons of copper had been extracted; 420,000 tons were mined in 1974.

V. I. STAROSTIN

References in periodicals archive ?
SANTIAGO, Chile, Dhu-AlQa'dah 25, 1436, Sep 9, 2015, SPA -- The world's top copper producing company says it has been forced to temporarily stop the concentrator at its Chuquicamata mine in Chile due to a protest by contract workers, according to AP.
Chile s Codelco has awarded the engineering services contract to Amec Foster Wheeler, the newly merged engineering giant, for a new secondary ore grinding processing facility, located at the Chuquicamata copper concentrator facility in northern Chile.
SeeNews) - Nov 13, 2012 - Chile's state-run copper miner Codelco confirmed yesterday that its Chuquicamata deposit will fall short of the initially planned output of 390,000 tonnes in 2012, as reported earlier in the day by local daily La Tercera.
It is turning Chuquicamata, the biggest open pit copper mine in the world, into an underground operation.
with over 30 years of experience, currently Process Engineering Manager with Antofagasta Minerals and previously with CODELCO Chile, Compania del Cobre Chuquicamata, Chile Copper Ltd and Chile Exploration Company (The Anaconda Company); - Guillermo Muller Masser, Mining Geologist with over 25 years of geology and mine reserve experience, currently Manager of Resources Evaluation in the Vice-Presidency of Mining Resources of Antofagasta Minerals (AMSA) and previous with CODELCO where his last post was Director of Geology.
1 copper miner, on Sunday said it has halted extraction of ore at its  Radomiro Tomic, Chuquicamata and part of Mina Sur mines in Chile after strong winds of up to 140 km/hour hurt visibility.
Concern has been growing as workers at Chile's Chuquicamata copper mine (the second biggest in the world) have recently been threatening to strike over pay disputes, with the state owned company Codelco announcing that the repercussions of any action could be a loss of around 1,800 tonnes daily to the market.
Copper marked a new 16-month high, despite the fact that the workers at Chuquicamata mine in Chile agreed with Codelco's offer and ended the strike," said Commerzbank analyst Carsten Fritsch.
About a third of the unionised workers at the Chuquicamata and Mina Sur mines refused to turn up for work on Monday.
The production of copper in sixth-century Chile's Chuquicamata mine.
Copper was extracted from Chuquicamata in pre-Inca times, and El Abra lies near the summit of a mountain.