A company that wants to extract gold from piles of decades-old mining waste outside Leadville no longer plans to use cyanide in its processes after hearing concerns from locals about the toxic ...

Toxic sodium cyanide has been used in gold mining since 1887, and it remains the primary reagent in use for gold processing ...

The Barrick Gold Canadian multinational company admitted that at least 224,000 liters of a “cyanide solution” have been spilled and said it was waiting on laboratory results over the substance.

Western Australia-based Mineral Process Control aims to raise the bar on gold assay efficiency, general manager Nathan Edwards said. Since 1995, the […] ...

The Yukon government says it has been informed of an "unauthorized discharge of cyanide-impacted water" at the site of last summer's mine disaster north of Mayo.

MCCALL, Idaho— Local and national conservation groups sued the U.S. Forest Service today to challenge its approval of the Stibnite Gold Project, an open-pit cyanide leach gold mine in Idaho’s Salmon ...