KeywordsArizona Geological Survey Bulletins
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DescriptionAssume that the prospector has found a promising outcrop, mineralized zone, or geological structure, indicating the possibility of an ore deposit, and that he has properly located and recorded a claim or claims to cover the area. The prospector then should sample the outcrop or zone by taking samples from trenches or test pits that have been dug into the solid rock of the outcrop or zone of mineralization. If the samples show that ore has been found, a development program can be planned, and, if capital is available, this plan can be put into operation. At this point many prospectors make a serious error by believing that the material found is ore. The United States Geological Survey defines ore as follows: "Ore is a natural aggregation of one or more minerals from which useful metals may be profitably extracted." It requires considerable mining and metallurgical experience to determine if the valuable minerals found can be "profitably extracted" and to determine if the material found is actually "ore."
Series/Report no.Geological Survey Bulletin No.164
Mineral Technology Series No. 48