Quantitative Mineral Resource Assessment of Selected Mineral Deposits in the Challis National Forest, Idaho

摘要

The quantitative assessment of selected mineral deposits in the Challis National Forest, Idaho, is provided to assist the U.S. Forest Service in complying with Title 36, Chapter 2, part 219.22, Code of Federal Regulations, which requires the Forest Service to provide information and interpretations so that mineral resources can be considered with other kinds of resources in land use planning. The quantitative assessment involves three steps that are followed by a computer simulation. Using available information and the MARK3 program, it is estimated at a 50-percent confidence level that undiscovered mineral deposits in the Challis National Forest contain 35 tonnes of gold, 7,700 tonnes of silver, 12,900 tonnes of copper, 4,790,000 tonnes of lead, 7,880,000 tonnes of zinc, 52,700 tonnes of tungsten, and 221,000 tonnes of molybdenum.