MLN 1121 Annual Report for the period 5 January 2015 to 4 January 2016

Abstract

The McArthur River mine is one of the world's largest zinc, lead and silver mines, situated approximately 70 kilometres southwest of Borroloola, near the Gulf of Carpentaria in the Northern Territory. It is operated by McArthur River Mining (MRM), a subsidiary of the Swiss mining company Glencore. Although discovered in 1955, when it was originally named the HYC ('Here's Your Chance') deposit, mining operations did not commence until 1995. MLN 1121 encompasses the main pit area of the McArthur River Mine and was granted in 1993. Initially an underground mining operation, the mine transitioned across to an open-cut operation in 2006. The sediment-hosted stratiform HYC deposit is approximately 1.5km long and 1.0km wide with an average thickness of 55m. The HYC deposit has similarities with ore-bodies at Mount Isa in Queensland. A Waste Characterisation Drilling Program was undertaken on MLN 1121 during the reporting period. Samples were collected from 24 reverse circulation holes that targeted the Upper Breccia Unit, immediately south of the Woyzbun Fault. Analytical results are pending and will become available during the forthcoming period. Analysis results from the 2014 Waste Characterisation Drilling Program became available during the reporting period and are included in the dataset submitted together with this report.