USGS Fact Sheet 2006–3072: Copper-Silver Deposits of the Revett Formation, Montana and Idaho

Copper-Silver Deposits of the Revett Formation, Montana and Idaho—Origin and Resource Potential

By Thomas P. Frost and Michael L. Zientek

Abstract

The Revett Formation of northern Idaho and western Montana contains major stratabound copper-silver deposits near Troy, Rock Creek, and Rock Lake, Montana. To help the U.S. Forest Service (USFS) meet its goal of integrating geoscience information into the land-planning process, U.S. Geological Survey (USGS) scientists recently completed a compilation of regional stratigraphy and mineralogy of the Revett Formation and a mineralresource assessment of Revett-type copper-silver deposits. The USGS assessment indicates that a large area of USFS-administered land in northwestern Montana and northern Idaho may contain significant undiscovered Revett-type copper-silver deposits.

First posted May 23, 2006

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For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591
http://geomaps.wr.usgs.gov/gmeg/

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Suggested citation:

Frost, T.P., and Zientek, M.L., 2006, Copper-silver deposits of the Revett Formation, Montana and Idaho—Origin and resource potential: U.S. Geological Survey Fact Sheet 2006–3072, 2 p., https://pubs.usgs.gov/fs/2006/3072/.