OZ Earns 51% Interest in West Musgrave Project

Work at OZ Minerals’ West Musgrave project focuses on further drilling and improving
metallurgical recoveries.
OZ Minerals has earned a 51% interest in the West Musgrave nickel-copper project in Western Australia from Cassini Resources following an investment of $22 million. The project is located 30 kilometers (km) from Jameson, Western Australia, near the state’s borders with South Australia and the Northern Territory. OZ and Cassini are conducting a prefeasibility study (PFS) of the project, focused to date on further drilling and improving metallurgical recoveries. OZ Minerals is managing the PFS, which is scheduled for completion in the second quarter of 2019.

OZ can increase its interest in West Musgrave to 70% by investing an additional $14 million toward project studies and regional exploration. Current work at West Musgrave is based on a “further scoping study” (FSS) completed in November 2017 that considered an open-pit mining project having an initial mine life of eight years, with several opportunities to add to mine life through upgrading of inferred resources, developing other known deposits on the West Musgrave property, and continuing to advance existing regional exploration targets.

Based on a mining rate of 10 million metric tons per year (mt/y), the FSS estimated that average annual production at West Musgrave could come in at 20,000 mt/y to 25,000 mt/y of nickel and 25,000 mt/y to 30,000 mt/y of copper in separate concentrates during the first eight years of production. Pre-production capital costs were estimated at $730 million to $800 million.

Mining would focus on the adjacent Nebo and Babel deposits, with the Nebo deposit to be mined first. At the time of completion of the FSS, the two deposits had a combined mineable resource of about 150 million mt, grading 0.35% nickel and 0.40% copper. Mining would be by openpit methods, utilizing an appropriately sized earthmoving fleet operated by contractors.

Ore processing would include conventional crushing, milling, and classification circuits, followed by two stages of conventional flotation with cleaning and re-cleaning to produce separate nickel and copper concentrates.

Regarding completion of OZ Minerals’ 51% earn-in to West Musgrave, company CEO Andrew Cole said ongoing study results have been encouraging in a number of areas, including resource extension drilling and metallurgy, with good progress also being made in heritage clearances and community engagement.

As featured in Womp 2018 Vol 11 - www.womp-int.com