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3.óMEC copper properties 60 ZCCM ASARCO Australia average net operating average total cost BC F BuMines Bureau of Mines byproduct credits C&F F Canada capital costs cash costs cash operating costs Chile contained copper copper industry copper properties included copper resources cost of production costs for copper crusher Current DCFROR dump leaching estimated average total evaluated flotation heap leaching increase January 1988 dollars leaching solution market economy countries MEC copper Metals million metric tons Minerals Availability Minero Peru mines and deposits Mining Corp Mining2 Namibia nonproducing deposits nonproducing mines Number Olympic Dam OP.SL F open pit Papua New Guinea Phelps Dodge Corp Philippines potential production producing mines quartile R&P F recoverable copper refined copper rock SAG mills selected MEC's SL F solvent extraction Sudbury operations sulfide SX-EW Table 3.óMEC copper total costs ranging Total or average total production costs truck Tsumeb U.S. dollars United upper quartile Zaire Zambia