The HGO comprises an operating underground and open pit gold operation in the Norseman region of Western Australia.
HGO has a modern 1.3 million tonne-per-annum Carbon-in-Pulp (CIP) gold processing plant, a 300-person village, the Trident underground mine (multiple open-pit mines and requisite mine and process infrastructure). Mining at HGO currently is focused on the Mt Henry Gold Project replacing the Trident underground mine as the key long-term source of gold production. Ore is also supplied from some short-term open pits at Lake Cowan and HGO.
Mineral Resources and Ore Reserves
At 30 June 2016 HGO had the following Mineral Resources and Ore Reserves:
• A Measured, Indicated and Inferred Resource of 33.6 million tonnes at 2.04 g/t gold, containing 2.2 million ounces of gold (Table 4); and
• A Proved and Probable Reserve of 7.6 million tonnes at 1.78 g/t gold, containing 433,000 ounces of gold (Table 6).
Production and Mine Plan
The Mt Henry Gold Project, located approximately 70km south of HGO, was acquired by Westgold in September 2015. Mt Henry consists of three main deposits: Mt Henry, Selene and North Scotia, all of which are conventional open pit mining propositions.