Doña Inés de Collahuasi is a Chilean mining company which owns the world's fourth largest copper mining operation. The operation consists of two main porphyry copper deposits, Ujina and Rosario, as well as a smaller deposit called Huinquintipa that contains only sulfide mineralization and copper oxides. Collahuasi has an expected mine life of more than 50 years. It processes copper sulphide and oxide ores to produce copper concentrates and cathodes, respectively. Its on-site facilities include open pit mines, concentrator plant, SX-EW plant, and a 200km pipeline to transport concentrate from the mine to the port of Punta Patache, 60km south of Iquique in northern Chile. Collahuasi is controlled by Swiss-based Xstrata and London-based Anglo American, both with a 44% share. The remainder belongs to a group of Japanese companies led by Mitsui.
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