|
| TABLE 8 | ||||||||
| EXPLORATION ACTIVITY IN THE UNITED STATES IN 2007, BY METHOD, COMMODITY, AND STATE1 | ||||||||
| (Meters) | ||||||||
| Rotary and | Percussion | |||||||
| Churn and | reverse | drilling, other | ||||||
| diamond | circulation | drilling, and | ||||||
| Commodity or State | drilling | drilling | trenching | Grand total | ||||
| Commodity: | ||||||||
| Gold | 268,000 | 679,000 | W | 947,000 | ||||
| Silver | 21,300 | -- | W | 21,300 | ||||
| Other2 | 57,000 | 127,000 | 308,000 | 492,000 | ||||
| � Total | 346,000 | 806,000 | 308,000 | 1,460,000 | ||||
| � Percentage of grand total | 24 | 55 | 21 | 100 | ||||
| State: | ||||||||
| Alaska | 2,670 | 9,200 | W | 11,900 | ||||
| Missouri | 11,100 | 10,100 | -- | 21,200 | ||||
| Nebraska | -- | 63,300 | -- | 63,300 | ||||
| Nevada | 260,000 | 670,000 | W | 930,000 | ||||
| New York | 16,200 | -- | -- | 16,200 | ||||
| Undistributed3 | 56,500 | 53,300 | 308,000 | 417,000 | ||||
| Total | 346,000 | 806,000 | 308,000 | 1,460,000 | ||||
| W Withheld to avoid disclosing company proprietary data; included with "Other" or "Undistributed."� -- Zero. | ||||||||
| 1Data are rounded to no more than three significant digits; may not add to totals shown. | ||||||||
| 2Includes boron minerals, brucite, copper, iron ore, lead, lead-zinc, molybdenum, uranium, talc, zinc, and commodity indicated� | ||||||||
| by symbol W.�� | ||||||||
| 3Includes Arizona, California, Colorado, Idaho, Minnesota, Montana, New Mexico, Tennessee, Wyoming, and States indicated� | ||||||||
| by symbol W.�� | ||||||||
Source: United States Geological Survey Mineral Resources Program