Arrow image


Mount Gibson currently operates the Koolan Island mine in WA’s Kimberley region, and previously operated the Extension Hill/Iron Hill and Tallering Peak mines in the state’s Mid West region.

Koolan Island

Mount Gibson’s flagship operation, Koolan Island is located in the Buccaneer Archipelago 140km north of Derby. Acquired through the takeover of Aztec Resources Ltd in 2007, the former BHP mine boasts Australia’s highest grade hematite Ore Reserves, totalling 21.0 Mt grading 65.5% Fe. Mount Gibson completed recommissioning of the former BHP mine and commenced shipments in April 2007. Mining was interrupted in late 2014 by a seawall failure which flooded the Main Pit, by which time Koolan Island had exported in excess of 22Mt of ore for Mount Gibson. Production and sales of high-grade hematite recommenced in April 2019 following a two year seawall reconstruction and mine refurbishment program.

Extension Hill/Iron Hill

Located 260km east of the Mid West city of Geraldton, production commenced in late 2011 at the Extension Hill deposit which yielded over 15Mt of iron ore by the time reserves were depleted in late 2016. Production then switched to the nearby Iron Hill deposit in early 2017, yielding an additional 5Mt of DSO iron ore by the time final sales were completed in February 2019. Sales of stockpiled low grade material from Extension Hill are expected to be concluded in late 2019, after which the Mid West business will transition to final closure.

Tallering Peak

Located 175km east of Geraldton, Tallering Peak was Mount Gibson’s first mine, commencing production in late 2003 and sales in early 2004. Sales exceeded 25Mt by the time production ceased in late 2014, and final site rehabilitation was concluded in 2015.

Geraldton Port

Ore from Mount Gibson’s Mid West operations are  exported through its established export base at Geraldton Port in Western Australia, where the Company two storage facilities at the port with a combined ore storage capacity of 360,000 tonnes.