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Mount Isa Mines, Mount Isa, City of Mount Isa, Queensland, …
The ore mineralisation is stratiform, occurring in the 1,600 million-year-old Lower Proterozoic Urquhart Shale sequence. At Mount Isa, the sequence is 1 km thick and dips at 65°. The orebodies lie within the upper 650 m and are bounded by the Mount Isa fault on the west and by volcanic greenstones to the east.