George Fisher Mine, near Mount Isa in northwest Queensland, has been producing Pb-Zn-Ag ore since the late 1980s. It consists of two separate underground deposits, George Fisher South and George Fisher North. These two deposits are drilled and modelled separately but are crushed and hoisted as a single stream. The Pb-Zn concentrator in Mount Isa processes ore from George Fisher Mine and Black Star Open Cut, with production also from the Isa Lead Mine until January 2006._x000D_
This paper outlines the steps involved in setting up a robust reconciliation system for George Fisher Mine, in conjunction with requirements of the Pb-Zn concentrator, Black Star Open Cut Mine and the Mount Isa Lead Mine. Good quality input data and commitment to training have contributed to establishing a robust and effective reconciliation system. Reconciliation data has highlighted several other continuous improvement opportunities._x000D_
FORMAL CITATION:Mascini, J, 2006. Analysing and validating production performance - a reconciliation case study from George Fisher Mine, northwest Queensland, in Proceedings Sixth International Mining Geology Conference, pp 299-306 (The Australasian Institute of Mining and Metallurgy: Melbourne).