Underground Large poly-metallic deposit of iron oxide-copper-uranium-gold mineralisation.

Olympic Dam’s underground mine is made up of more than 450 kilometres of underground roads and tunnels, with a mine depth of 860 metres. The operation extracts copper uranium ore, with the ore hauled by automated train to feed underground crushing, storage and ore hoisting facilities.

Sub-level open stoping underground mine allows selective access to specific grades.

Olympic Dam’s processing plant consists of two grinding circuits in which high-quality copper concentrate is extracted from sulphide ore through a flotation extraction process. The operation includes a fully integrated metallurgical complex with a grinding and concentrating circuit, a hydrometallurgical plant incorporating solvent extraction circuits for copper and uranium, a copper smelter, a copper refinery and a recovery circuit for precious metals.