Collahuasi mine
Collahuasi mine is located in Chile Collahuasi mine Collahuasi mine | |
| Location | |
|---|---|
| Region | Tarapacá Region |
| Country | Chile |
| Coordinates | 20°59′29.19′′S 68°38′19′′W / 20.9914417°S 68.63861°W / -20.9914417; -68.63861 |
| Production | |
| Products | Copper Molybdenum |
| Owner | |
| Company | Compañía Minera Doña Inés de Collahuasi
|
The Collahuasi or Ujina mine is a large copper mine located at 4,200 m (13,800 ft) altitude in the north of Chile in the Tarapaca Region. Collahuasi represents one of the largest copper reserves in Chile and in the world having estimated reserves of 3.93 billion tonnes of ore grading 0.66% copper.[1] It lies about 15 km east of the copper mine of Quebrada Blanca.[2]
The mine produced 560,000 tonnes of copper in 2018, making it one of the world's largest copper mines.[3]
The ore concentrate produced in Collahuasi mine contain about 41% chalcopyrite, 18% chalcocite, 16% pyrite and 4% pyrrhotite.[A]
An early period of mining in Collahuasi occurred from about 1905 until 1930.[2]
2020s: Water scarcity and expansion project
[edit ]In the 2020s the mine has faced difficulties relating to water scarcity and decreasing ore grades.[5] In May 2026 the mine suffered a major legal reversal as the First Environmental Court of Antofagasta annulled a key permit (RCA) for a 3ドル.2 billion expansion of the mine.[6] The Environmental Assessment Service is set to reassess two items of the expansion project, the desalination plant and the "human environment" (Spanish: medio humano).[6] [7] The approval of other items remain intact.[7] If approved as whole, the expansion project will delay for 20 years the planned mine closure.[7]
Climate
[edit ]| Climate data for Collahuasi, elevation 4,800 m (15,700 ft) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 12.2 (54.0) |
8.3 (46.9) |
9.3 (48.7) |
9.3 (48.7) |
5.9 (42.6) |
1.9 (35.4) |
3.0 (37.4) |
3.9 (39.0) |
4.0 (39.2) |
7.7 (45.9) |
9.6 (49.3) |
10.3 (50.5) |
7.1 (44.8) |
| Daily mean °C (°F) | 3.5 (38.3) |
1.7 (35.1) |
1.3 (34.3) |
0.6 (33.1) |
−2.6 (27.3) |
−5.9 (21.4) |
−4.0 (24.8) |
−3.3 (26.1) |
−2.8 (27.0) |
−0.9 (30.4) |
0.0 (32.0) |
2.5 (36.5) |
−0.8 (30.5) |
| Mean daily minimum °C (°F) | −1.5 (29.3) |
−1.4 (29.5) |
−3.1 (26.4) |
−4.4 (24.1) |
−7.0 (19.4) |
−10.4 (13.3) |
−9.1 (15.6) |
−8.3 (17.1) |
−8.4 (16.9) |
−6.3 (20.7) |
−5.7 (21.7) |
−2.7 (27.1) |
−5.7 (21.8) |
| Average precipitation mm (inches) | 5.5 (0.22) |
5.1 (0.20) |
2.5 (0.10) |
0.0 (0.0) |
0.0 (0.0) |
4.5 (0.18) |
0.0 (0.0) |
0.0 (0.0) |
10.0 (0.39) |
2.5 (0.10) |
0.0 (0.0) |
5.0 (0.20) |
35.1 (1.39) |
| Source: Bioclimatografia de Chile[8] | |||||||||||||
Notes
[edit ]- ^ When dry and as weight percent.[4]
References
[edit ]- ^ "Copper mines". angloamerican.com. 2011. Archived from the original on 2013年02月02日. Retrieved 2013年07月06日.
- ^ a b Millán 1996, p. 152.
- ^ "Chile's Collahuasi copper mine expects to match 2018 record output this year – CEO". MINING.COM. 2021年05月12日. Retrieved 2022年07月22日.
- ^ Alvear Flores, Gerardo; Risopatrón, Carlos; Pease, Joe (2020). "Processing of Complex Materials in the Copper Industry: Challenges and Opportunities Ahead" (PDF). JOM . 72 (10). doi:10.1007/s11837-020-04255-9.
- ^ "Collahuasi pierde 74 % de utilidades por escasez hídrica y menor ley del cobre". Chile País Minero (in Spanish). 2025年06月30日. Retrieved 2025年07月01日.
- ^ a b Jamasmie, Cecilia (2026年05月22日). "Collahuasi permit setback jolts Chile copper sector". Mining.com. Retrieved 2026年05月22日.
- ^ a b c Rifo, Miguel (2026年05月22日). "Collahuasi logra aclaración judicial sobre anulación de RCA del proyecto C20+". Reporte Minero & Energético (in Spanish). Retrieved 2026年05月22日.
- ^ Hajek, Ernst; Castri, Francesco (1975). "Bioclimatografia de Chile" (PDF) (in Spanish). Archived from the original (PDF) on 22 November 2009. Retrieved 27 May 2024.
- Bibliography
- Millán, Augusto (1996). Evaluación y factibilidad de proyectos mineros (in Spanish). Editorial Universitaria. ISBN 956-11-1241-8.