The Robinson Mine near Ely produced 23.7 million pounds of copper during the second quarter, up from 22.9 million pounds a year earlier.
The mine also produced 15,200 ounces of precious metals gold, platinum and palladium during the quarter, says its owner, Quadra FNX Mining of Vancouver.
That's down from 18,031 ounces of precious metals produced by the mine a year earlier.
