The mine opened in 1955 and comprises both underground and surface workings within a sulfide ore body.

It is possible to find mineral specimens in the spoil heaps of the old mine, such as chalcopyrite, pyrite, bornite, malachite, dolomite, hessite, merenskyite, millerite, palladium, quartz and others.

The Lake Temagami Access Road was created to ship ore from the mine site.

Copper-nickel mineralization at the mine is associated with semi-massive to disseminated pyrite at the lower contact between altered gabbro and rhyolite of the Temagami Greenstone Belt.

Copperfields Mine is the discovery site of a bright white mineral called temagamite.