Barrick Gold Corporation (Barrick) is engaged in the production and sale of gold, as well as related activities, such as exploration and mine development. Barrick also produces copper, principally from the Zaldivar and Lumwana mines and holds other interests, including a nickel development project located in Africa. Barrick�s business is organized into seven primary operating segments: four regional gold businesses, a global copper business unit, an oil and gas business, and a capital projects group. Its producing gold mines are concentrated in three regional business units (RBU): North America, South America, and Australia Pacific. Its Copper business unit contains producing copper mines located in Chile and Zambia. Barrick�s North American RBU consists of its Cortez, and 60% interest in the new Pueblo Viejo mine. In October 2013, Barrick Gold Corporation completed the divestiture of its Yilgarn South assets (Yilgarn South) in Western Australia to Gold Fields Limited.