Sierra Gorda Sociedad Contractual Minera (Sierra Gorda SCM), a JV between Japanese firms Sumitomo Metal Mining Co. Ltd. (31.5%) and Sumitomo Corp. (13.5%) and Polish mining company KGHM International Ltd. (55%), is developing the Sierra Gorda copper-molybdenum mine in northern Chile's Antofagasta region (II). Construction of the mine is being carried out in two stages. The first was completed in July 2014 and involved the construction of a conventional open-pit mine, infrastructure and a processing plant for the separation of molybdenum concentrate with a processing capacity of 110,000t/d of ore, the oxide ore being stored for potential heap leaching. The copper concentrates produced by Sierra Gorda is transported to the port of Antofagasta, and from there by sea to smelters around the world. The mine also has exploration potential in adjacent terrain. In the second stage the firm aims to expand the mine's capacity, envisioning a production of 220,00t copper, 25,000oz molybdenum and 64,000oz gold a year during the mine's 23-year lifespan.