Mount Isa Mines, Ltd.

Australian company

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July 1, 2026

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Mount Isa Mines, Ltd. is an Australian company primarily known for its significant mining operations in Queensland, Australia. The company's origins trace back to 1923 when John Campbell Miles discovered silver-lead ore deposits, leading to the establishment of Mount Isa Mines, Ltd. as the principal leaseholder.1

The mines are a major source of silver, lead, zinc, and copper in Australia. In the early 1970s, the discovery of substantial silver, lead, and zinc deposits at Hilton, north of Mount Isa, propelled Mount Isa Mines, Ltd. to become the world's largest single producer of these metals. The area also supports cattle ranching and hosts an annual rodeo.1

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Mount Isa
Subsequently, Mount Isa Mines, Ltd., the principal leaseholder, developed the minefields, which are Australia’s main source of silver, lead, zinc, and copper. In the early 1970s large silver, lead, and zinc deposits found at Hilton, about 20 miles (32 km) north of Mount Isa, made Mount…
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Subsequently, Mount Isa Mines, Ltd., the principal leaseholder, developed the minefields, which are Australia’s main source of silver, lead, zinc, and copper. In the early 1970s large silver, lead, and zinc deposits found at Hilton, about 20 miles (32 km) north of Mount Isa, made Mount…
Read More