Mineral resource assessment of the Dillon 1 degree x 2 degrees Quadrangle, Idaho and Montana
- Robert Carl Pearson, C.M. Trautwein, E.T. Ruppel, W.F. Hanna, L.C. Rowan, J.S. Loen, and B.R. Berger
The Dillon 1°x2° quadrangle in southwestern Montana and east-central Idaho was investigated as part of the U.S. Geological Survey's Conterminous United States Mineral Assessment Program (CUSMAP) to determine its mineral resource potential. An interdisciplinary study was made of geology, geochemistry, geophysics (gravity and aeromagnetics), remote sensing, and mineral deposits. The results of those studies, as well as mineral resource assessment of numerous mineraldeposit types, are published separately as a folio of maps. This report summarizes the studies, provides background information on them, and presents a selected bibliography relevant to the geology and mineral resources of the quadrangle.
The quadrangle contains large resources of gold and substantial resources of talc and chlorite, all of which were being mined in the 1980's and early 1990's. Submarginal resources of molybdenum, copper, tungsten, and iron range from moderately large to large. Other commodities that may be present in significant amounts are chromite, lead, zinc, silver, barite, zeolite minerals, and various nonmetallic metamorphic minerals.
Additional publication details
- Publication type:
- Publication Subtype:
- USGS Numbered Series
- Mineral resource assessment of the Dillon 1 degree x 2 degrees Quadrangle, Idaho and Montana
- Series title:
- Series number:
- Year Published:
- U.S. Government Printing Office
- Publisher location:
- Washington, D.C.
- Contributing office(s):
- Earth Resources Observation and Science (EROS) Center
- iii, 15 p.