Coeur d'Alene-type

Metamorphic dewatering of moderately oxidized siliciclastic sequences during exhumation with fluid flow along dilatant structures. Metasedimentary host rocks may contain basin brine path Pb-Zn and Cu±Co deposits.
Color on map:

Deposit types

Name Commodities Critical minerals
Polymetallic sulfide Ag, Pb, Zn, Cu Sb, Co, Ge, Ga, In
Antimony Sb Sb
Uranium U U

References


Source: Hofstra, A.H., and Kreiner, D.C., 2020, Systems-Deposits-Commodities-Critical Minerals Table for the Earth Mapping Resources Initiative: U.S. Geological Survey Open-File Report 2020-1042, 24 p., https://doi.org/10.3133/ofr20201042.

List of Earth MRI focus areas with mineral system = Coeur d'Alene-type

6 focus areas match these criteria.

Focus area Region States Mineral Systems Deposit types Commodities
Clark Fork Northwest Idaho Coeur d'Alene-type Polymetallic sulfide copper; gold; lead; silver
Coeur d'Alene Mining District (Silver Valley antimony) Northwest Idaho; Montana Coeur d'Alene-type Antimony; Polymetallic sulfide cadmium; copper; lead; silver
Front Range Proterozoic Rocky Mountains Colorado Coeur d'Alene-type Uranium uranium
Southwest Arkansas Antimony District South Central Arkansas Coeur d'Alene-type Antimony; Polymetallic sulfide copper; lead; silver
Box Elder district Southwest Utah Coeur d'Alene-type Antimony; Polymetallic sulfide copper; lead; silver
Picuris district (Copper Hill) Southwest New Mexico Coeur d'Alene-type Polymetallic sulfide copper; gold; lead; silver