Mount Isa Mines' Copper Operations: Celebrating Over 70 Years of Legacy

This week marks a significant milestone in Australian mining history as Glencore’s Mount Isa Mines (MIM) underground copper operations, Enterprise and X41, officially conclude more than 70 years of continuous production.

An Iconic Chapter Comes to a Close

The end of operations at Mount Isa Copper Operations (MICO) represents the conclusion of one of Australia's longest-running and most iconic copper mining ventures. Since commencing in the 1950s, MICO has extracted hundreds of millions of tonnes of ore, playing a critical role in supplying the world with essential minerals and contributing to the development of Mount Isa into a cornerstone of the nation’s mining industry.

With more than 1,000 kilometres of underground roadways and mining infrastructure, MICO has stood as a symbol of industrial innovation, workforce development, and operational resilience for generations.

Acknowledging the People and the Community

Glencore Metals Australia Interim Chief Operating Officer, Troy Wilson, reflected on the significance of the moment. Having started his own mining career over 30 years ago at the neighbouring zinc-lead mine, Wilson emphasised the enduring legacy of MICO.

“Mount Isa Mines, including MICO, has a rich history. For generations, working at MIM has been considered a rite of passage for Australian miners,” he said.

“We extend our deepest gratitude to all MICO employees, past and present, and their families. We also thank the Mount Isa community, who have supported and welcomed the mine with unwavering pride and perseverance since day one.”

Wilson highlighted the vital contributions of MICO’s workforce: “The skills, resilience, and teamwork shown by our people have been remarkable. Their legacy will continue to shape the future of this region and inspire future generations.”

Marking the Final Chapter

On Monday, July 28, crews gathered underground for a momentous and emotional ‘last blast’, the final use of explosives on-site. This symbolic event marked the end of production activities at the mine. On 31 July, the last official shift concluded with the final lift of the underground cage, bringing an era to its symbolic close.

Looking Ahead: A Continued Commitment to Mount Isa

Despite the closure of MICO, Glencore remains committed to the long-term future of Mount Isa Mines. The George Fisher Mine, focused on zinc and lead production, is operational and forecast to continue through to at least 2042.

Additionally, the company is advancing plans for the Black Star Open Cut zinc-lead-silver project. If approved, this project could see an investment of approximately A$1 billion and a potential mine life of up to two decades, reaffirming Glencore’s enduring presence in the region.