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Eight mining districts and numerous individual mines ring the eastern Pioneer Mountains, Beaverhead County, Montana, and are within 4 mi of the boundary of the eastern Pioneer area. Mineralized ground peripheral to these districts extends into the area at several places. Three of 12 molybdenum prospects in the Pioneer Mountains are within the eastern Pioneer area. Several areas of Paleozoic carbonate rocks are mineralized or favorably situated with respect to the Pioneer batholith. All such areas have probable resource potential. Detailed studies of structural and stratigraphic controls of ore deposition and its association with intrusive rocks of particular types and ages may be useful in providing the basis for a more precise resource assessment.
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EASTERN PIONEER MOUNTAINS, MONTANA.
Geological Survey Professional Paper (United States)