Letneye mine
Orenburg Oblast, Russia
The Letneye mine is a large copper mine located in the south-west region of Russia in Orenburg Oblast. Letneye represents one of the largest copper reserve in not only Russia but also in the world having estimated reserves of 272 million tonnes of ore grading 2.89% copper.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).