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The Middle Fork of the Judith River Wilderness Study Area in Montana has several prospects containing local small inferred resources and several exposed mineral occurrences bearing silver, lead, copper, and gold along its north and west edges with no identified resource potential. Geologic, geophysical, and geochemical studies, conducted to appraise the mineral resources of the study area, identified no other anomalous concentrations of metallic elements. A gem-quality sapphire resource, present near the east boundary, cannot be identified within the study area. The area holds little promise for the occurrence of other mineral or energy resources.
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MIDDLE FORK OF THE JUDITH RIVER WILDERNESS STUDY AREA, MONTANA.
Geological Survey Professional Paper (United States)