Deposits and prospects used to assess undiscovered copper resources (with reported mineral montmorillonite/smectite)
| Site name | Country | State or province | Development |
|---|---|---|---|
| Castle Dome | United States | Arizona | Occurrence |
| Christmas | United States | Arizona | Occurrence |
| Gaby-Papa Grande | Ecuador | Azuay | Prospect |
| El Salvador | Chile | Atacama | Producer |
| El Teniente | Chile | Libertador General Bernardo O'Higgins | Producer |
| Campana Mahuida | Argentina | Neuquén | Producer |
| San Fabian | Philippines | Nueva Vizcaya | Prospect |
| Grasberg | Indonesia | Papua | Producer |
| Site name | Country | State or province | Development |
|---|