Search USGS⌕ Search
Home/Archive/USGS

USGS · fs20063072

Copper-silver deposits of the Revett Formation, Montana and Idaho: Origin and resource potential

Thomas P. Frost·Michael L. Zientek
View original source ↗Read source document ↗Export metadata ↓

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 mineral resource 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.

Explore related subjects

Fact SheetReport
90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 47.35° to 48.3833° latitude; -116.3667° to -115.1167° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Thomas P. Frost, Michael L. Zientek. 2006. Copper-silver deposits of the Revett Formation, Montana and Idaho: Origin and resource potential. https://doi.org/10.3133/fs20063072

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related USGS reports

USGS2026

Compensatory offsetting tool for energy infrastructure

The U.S. Geological Survey and the Habitat and Population Evaluation Team of the U.S. Fish and Wildlife Service created several tools that enable compensatory offsets for displacement of breeding grassland birds and waterfowl associated with energy infrastructure, including renewable-energy, oil, and gas facilities and roads. The Avian-Impact Offset Method (AIOM) addresses displacement affecting grassland birds and waterfowl. The basis of the AIOM is a calculation that quantifies the displacement of grassland birds and waterfowl associated with energy infrastructure (that is, the disturbance features). The AIOM then estimates the amount of habitat needed to compensate for this displacement. The AIOM converts the number of bird pairs lost owing to avian behavioral avoidance and estimates the site-specific area of grasslands or the number of wetlands needed to compensate for displaced pairs of grassland birds or waterfowl, respectively. Decision-support tools spatially apply the AIOM to estimate grassland and wetland offsets and guide the location of offsetting measures. The AIOM can be applied to offsetting measures, including preserving existing habitat, restoring former habitat, or establishing conservation banks.

Fact Sheet↗
USGS2026

The National Wildlife Disease Database

The National Wildlife Disease Database (NWDD) is a national information hub that integrates wildlife disease data across jurisdictions to guide natural resource management and deliver early warnings of unusual events and emerging threats, strengthening public health preparedness and protecting the agricultural economy.

Fact Sheet↗