Since its discovery in 1883 by BHP Ltd, the Central Mining Lease (CML7) has reportedly produced 54Mt of ore grading 6.5% Zn, 12.5% Pb and 280g/t Ag. The license initially passed to Broken Hill South Ltd and subsequently to Minerals Mining & Metallurgy Ltd, which ceased mining in 1991. Following the sale of the Pasminco operation to Perilya and after the rejection of advances by CBH Resources to Perilya, CBH Resources changed its plans to a stand-alone milling operation. CBH Resources was taken over by Toho Zinc in 2010, but retained CBH Resources as the operating title.
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