Sulphide deposits sit on broadly defined trends of mineralisation along basal brecciated rocks of the Sudbury Igneous Complex as pentlandite-pyrrhotite-chalcopyrite rich concentrations as well as within the underlying footwall in fractured pathways as chalcopyrite dominated polymetallic (Cu, Ni, Au, Ag, Pt, Pd) vein-style sulphides.

Nickel Rim South (NRS) is a modern mine using blast-hole open stoping with backfill as a means of bulk mining.

The Strathcona concentrator receives ore from the two Sudbury mines as well as third-party custom feed ores and produces two concentrate streams – a nickel-copper concentrate that goes to the Sudbury Smelter for smelting and a copper concentrate that goes to Glencore Copper for smelting and refining. The mill has a maximum capacity of approximately 2.75 million tonnes of ore per year.