Located in the town of Pyhäjärvi in the south of Oulu province, in central Finland, the Pyhäsalmi mine is an underground copper and zinc mine, owned by Canadian mining corporation First Quantum Minerals.
With a depth measuring 1,444 metres, or 4,738 feet, it is the deepest metal mine in Europe and among the continents oldest. It origins date back to 1958, when a local farmer came across gossan ore during a well construction. A sample of this ore was soon delivered to Outokumpu Corporation, which, following analysis of the sample ordered a more thorough geological survey to be conducted on the area. Said survey revealed a rich volcanogenic massive sulphide (VMS) deposit rich in copper and zinc, and come 1959 the decision was taken to open up a new mine at the site of the ore discovery.
The Pyhäsalmi mine opened on 1 March 1962. For the first five years it existed as an open cast pit, before underground mining operations commenced in 1967. Outokumpu was responsible for designing an underground development plan for the mine and in 2001 completed the construction of a 1,450 metre deep automated hoisting shaft. A year later the mine was acquired by Inmet Mining, who continued forward with the underground development plan. Fast forward to 2013 and the company found itself being acquired by First Quantum Minerals as part of its purchase of the Inmet Mining group.