In mining, cyanide spills can cause fish kills and other problems, most recently at a river in Ghana last week downstream from a gold mine. While cyanide in mining is nothing new, using heap leaching ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Evidence abounds across Montana of the ruinous environmental legacy of cyanide-based open-pit ...

Since the modern gold rushes of the 1970s and 1980s, gold has been one of Australia's major exports. Australia is the second-largest gold producer globally behind China and holds the second largest ...

A groundbreaking new technology for gold extraction from cyanide processes is revolutionizing the mining industry by significantly boosting precious metal recovery rates through the recycling of this ...

I was horrified to watch the state Senate at the 11th hour pass a bill to reopen the door to cyanide heap-leach mining. This is a method of open-pit mining that uses cyanide to leach out gold and ...

Getting your Trinity Audio player ready... LEADVILLE — Millions of tons of waste from decades-old mining operations sit in the hills east of town. The brown and orange piles of abandoned ore rise 30 ...

Thiosulfate leaching is emerging as a promising alternative to traditional cyanidation methods in gold extraction. This process utilises thiosulfate as a lixiviant, offering enhanced environmental ...

Exceptional Gold Recovery: 96% and 91% gold recoveries from coarse ¾ inch material, representing a mix of oxidized and non-oxidized fresh mineralization from 9 drill holes from the Chicken Mountain ...

That same year Pegasus Gold filed for bankruptcy. On Monday, the Montana Department of Environmental Quality announced it has transferred an operating permit from Majesty Mining to Bear Claw Mining ...