Olympic DamOlympic Dam is a vertically integrated operationOperation producing cathodeCathode copperCopper, uranium oxide concentrateConcentrate and goldGold and silverSilver bullion. The site includes an underground mineMine, concentratorConcentrator, hydrometallurgical circuit with copperCopper and uranium solvent extractionSolvent extraction, smelterSmelter, copper electrorefineryCopper electrorefinery and slimes treatment. Owing to the integrated nature of the site, the behaviour of minor and deleterious elementsElements is important. The sulphides in the orebody are predominantly copperCopper- or ironIron-sulphides, and these have been successfully recovered in the concentratorConcentrator bulk sulphide flotationFlotation circuit. The geometallurgyGeometallurgy programme identified localised concentrations of sphaleriteSphalerite in un-mined areas of the orebody, which are being considered for future bulk miningMining strategies. Initial test work and mineMine plans indicated gradesGrade in concentrateConcentrate of above 2% zincZinc. Since zincZinc has not been part of the ore feed, the behaviour of zincZinc through the highly integrated processingProcessing circuit was not understood. The expected behaviour of sphaleriteSphalerite and zincZinc through the surface flowsheet, and around the future Flash SmeltingFlash smelting and Converting smelterSmelter was modelled to inform limits in concentrateConcentrate and in ore, to allow appropriate limits for zincZinc to be placed on mineMine sources, and identify blending options.