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| TABLE 3 | |||||||||
| MINE PRODUCTION OF COPPER-BEARING ORES AND RECOVERABLE COPPER CONTENT OF ORES | |||||||||
| PRODUCED IN THE UNITED STATES, BY SOURCE AND TREATMENT PROCESS1 | |||||||||
| (Metric tons) | |||||||||
| 2005 | 2006 | ||||||||
| Gross | �Recoverable | Gross | �Recoverable | ||||||
| Source and treatment process | weight2 | copper | weight2 | copper | |||||
| Mined copper ore: | |||||||||
| Concentrated | 154,000,000 | 529,000 | 163,000,000 | 603,000 | |||||
| Leached | NA | 554,000 | NA | 530,000 | |||||
| Total | NA | 1,080,000 | NA | 1,130,000 | |||||
| Copper precipitates shipped, leached from | |||||||||
| tailings, dumps, and in-place material | 1,490 | 1,990 | 1,990 | 2,840 | |||||
| Other copper-bearing ores3 | 5,170,000 | 55,000 | 5,000,000 | 60,700 | |||||
| Grand total | XX | 1,140,000 | XX | 1,200,000 | |||||
| NA Not available.� XX Not applicable.� | |||||||||
| 1Data are rounded to no more than three significant digits; may not add to totals shown. | |||||||||
| 2In 2006, 18,000 kilograms of gold and 220 metric tons of silver were recovered from concentrated ore.� The� | |||||||||
| average value of gold and silver per metric ton of ore concentrated was $2.65. | |||||||||
| 3Includes gold ore, lead ore, silver ore, silver-copper ore, zinc ore, and ore shipped directly to smelters. | � | ||||||||
Source: United States Geological Survey Mineral Resources Program