Ajo Copper Mine
closed in 1985

Ajo Mine Tailings

Section A is waste rock from the pit, referred to as the "Dump."
Sections B, C, D and E are waste or by product of concentrating the copper ore for smelting.
Section F, the black slag dump, is the waste from smelting the concentrated ore.

The refined copper was cast into anodes weighing approximately 720 pounds. The copper anodes were shipped to El Paso, Texas for further purification by electrolytic deposition. There was enough gold and silver recovered from the anodes to pay for the cost of the electrolytic process.

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