Gunnison Copper (TSX: GCU; OTCQB: GCUMF) produced copper using Rio Tinto’s (NYSE, LSE, ASX: RIO) Nuton sulphide-leaching ...

Companies with upcoming copper mines in the US could be poised to benefit from tailwinds in the sector, including supply deficits and the Trump administration's promises to cut "red tape" for critical ...

A proposed open-pit copper mine in the Santa Rita Mountains would harm the area's ecosystem and views and threaten groundwater supplies and the tourism industry, county Supervisor Ray Carroll says.

It will also be used to advance the adjacent Southwest Open Pit copper project The transaction was completed in Q2 of 2025 Kinterra expects Pumpkin Hollow to restart copper production within 24 months ...

The U.S. Forest Service will look into the potential environmental and social impact of a mile-wide open-pit mine that a company proposes digging in the Santa Rita Mountains. Notice of Coronado ...

People in a drought-stricken valley worry an expanding copper mine and other mineral projects could sap or contaminate their water. SAN JUAN COUNTY, Utah — President Donald Trump’s push for a ...

The Canadian company’s mine in Arizona would produce copper and molybdenum concentrate. Developers of an ambitious open-pit copper mine in Arizona have now enlisted former Interior Secretary David ...