The Mariners Nickel Mine was discovered and operated by WMC Resources Ltd between 1991 and 1999, over which period it produced 1,114,730 tonnes of ore at 2.53% nickel for 28,190 tonnes contained nickel metal. It was closed by WMC and written off in 1999 due to flooding which coincided with a period of low nickel prices. Mincor acquired the project at no cost as part of its acquisition of the Miitel Nickel Mine in 2001.
Mincor carried out feasibility studies on reopening Mariners during 2002 and 2003, and gave the project the go-ahead in 2004. After six months of pumping, the mine was de-watered and mining commenced.
Since then, and to September 2012, Mincor has extracted 1.14 million tonnes of ore at 2.6% nickel for 29,600 tonnes of contained nickel.
Unusually developed as a decline operation from an island in a salt lake - hence perhaps the name.