I worked as a contractor in the Nickel mining industry in the early to mid 1970's, South of Kambalda. Nickel was in huge demand back then, for armaments and armour plating, largely because of the Vietnam War. It was an interesting time. Anaconda Copper of America came to Australia, and formed Anaconda Nickel (Aust), to mine the Nickel S of Widgiemooltha (this company wasn't the Anaconda Nickel that Andrew "Twiggy" Forrest formed later on in the late 1980's, to mine nickel at Murrin Murrin - "Twiggy" just "borrowed" the name).
Anaconda Nickel of the 1970's spent money like water, and their financial controls were poor, to say the least - but they were one of the richest mining companies in America. Then the copper price went way down, and the Chile Govt of Salvador Allende nationalised their copper mines in Chile, with little or no compensation.
The Anaconda company and its subsidiaries effectively became almost bankrupt over a very short period of time, and they had to sell what assets they had left, to try and survive. Atlantic Richfield (ARCO) took over their copper assets in the late 1970's, including the huge Anaconda copper mine, smelter and refinery in Butte, Montana - but ARCO then closed down all the Anaconda operations by 1982, leaving Butte a ghost town - and a seriously contaminated one at that.
The History of Anaconda Copper and the Anaconda Company - https://utahrails.net/mining/anaconda-history.php
The sad story of Butte, Montana - https://www.theatlantic.com/magazine/archive/2001/04/the-profits-of-doom/302177/
The story of Butte above, was written in 2001. The cleanup of the massive levels of toxic waste and water contamination from Anaconda's mining, still goes on in Montana today.
https://dailymontanan.com/2024/06/28/down-with-dirty-dirt-and-waste-in-place-in-butte/