Eagle Mine, U.S.A.
Nickel Copper Mine
The Eagle nickel and copper mine is located in the Upper Peninsula of Michigan, USA, in Michigamme Township, Marquette County. The property is on the watershed divide of the Yellow Dog River and Salmon Trout Rivers.
The closest community to the mine site is Big Bay, 24km from the property by road. Big Bay is an unincorporated community within Powell Township and has limited services. The closest full service community is Marquette, 53km by road from the property. Marquette provides a regional airport, rail and shipping facilities, and a full range of commercial services.
The Humboldt mill property, a former iron ore processing facility, occupying approximately 142 hectares, is located 61km west of Marquette, Michigan. The facility is located in the township of Humboldt, Marquette County, Michigan.
Ore from the Eagle mine will be trucked 105 km to the Humboldt mill for processing.
Road access to the mine property is by means of maintained loose surface and paved roads from the communities of Big Bay to the east, L'Anse to the west, and Marquette to the south. The Humbolt mill is located close to the main US Route 41.
The Eagle deposit is a high-grade magmatic sulphide deposit containing nickel and copper mineralization and minor amounts of cobalt, precious and platinum group metals (PGMs). The economic minerals associated with this deposit are predominately pentlandite and chalcopyrite.
Three distinct types of sulphide mineralization occur at the Eagle deposit. They are described as disseminated, semi-massive and massive sulphide. Massive sulphide is generally over 90% pyrrhotite-pentlandite-chalcopyrite. Semi-massive, or matrix ore, is 30% or greater net textured sulphide. Disseminated mineralization is generally uneconomic. The semi-massive and massive sulphides occur in separate zones called the Massive Sulphide, Semi-massive East, and Semi-massive West zones.
Eagle is a relatively shallow underground mine with access gained via a surface ramp that will serve as the route for waste, ore and backfill haulage. The mine will employ transverse bench-and-fill stoping with mining in an up-dip primary secondary sequence. Backfilling will be undertaken using cemented and uncemented rockfill. Two ventilation shafts are in place, with the downcast shaft also equipped for emergency egress. Ore from the mine will be stored in a covered coarse ore stockpile facility prior to transport by road 105km to the Humbolt mill site.
The Humbolt mill is a former iron ore processing plant that is being converted for processing Eagle ore. From a further covered coarse ore storage facility, the ore will be processed using a conventional crush, grind and differential flotation process to produce separate nickel and copper concentrates. Tailings from the plant will be deposited sub-aqueously in the adjacent former Humbolt iron ore open pit.
Nickel and copper concentrates will be stored in a covered concentrate building on site. A rail spur in to the site will be used to transport the concentrate direct to smelter facilities within North America or to the ports of Quebec, Montreal or Vancouver for shipment to overseas smelters.
Please see Annual Information Form
and Quarterly Operations Updates
and Financial Statements
for further information.
Quarterly Operations Update