Name: Red Lake mines.

Location: The Red Lake mines are located in one of the world’s most prolific gold camps, about 230 km north-west of Dryden, Ontario, Canada.

Controlling Company: Goldcorp.

Brief Description: Red Lake mines consists of the Campbell complex and the Red Lake complex, which feed two separate processing facilities.

The High Grade Zone is the backbone of the Red Lake operation, with an average grade of more than two ounces of gold per tonne. Recent investments in infrastructure and development have positioned the mine for many more years of long-term sustainable production. 

Included in Red Lake's cash generating unit is the Cochenour deposit, which combines the existing workings of the historic Cochenour mine with the Bruce Channel gold discovery in the Red Lake camp. The mine has the potential to share infrastructure when the project is in production.

Brief History: Red Lake mines have been in continuous operation since 1949.

The Campbell mine was formerly owned by Placer Dome and is now owned by Goldcorp, following Placer’s take-over by Barrick Gold in early 2006. Barrick subsequently sold several former Placer properties to Goldcorp, especially where there was the potential for operational synergies between neighbouring mines.

Upon the merger with Placer Dome, Goldcorp merged the Red Lake and Campbell mines.

Products: Gold.

Geology/Mineralisation: The Red Lake operations are situated in the eastern part of the Red Lake greenstone belt, in the Birch-Uchi Lake subprovince of the Superior province, within the core of the Canadian Shield. The Balmer Assemblage, which hosts the Red Lake gold mines, is part of the oldest sequence in the belt, consisting of a highly deformed Mesoarchean tholeiitic volcano-sedimentary complex, which locally plunges steeply to the south-west. This folded volcanic package is in contact with the main regional unconformity up against the Neoarchean sedimentary dominated Bruce Channel Assemblage.

This deposit occurs within predominantly intensely altered mafic and ultramafic rocks, with lesser amounts of intercalated intermediate to felsic intrusive rocks and chemical to clastic sedimentary units. Hydrothermal alteration of the deposit comprises multiple superimposed zoned alteration events. Early widespread alteration and carbonate vein formation was controlled by permeable shears, faults, lithologic contacts and other high angle brittle structures. This early stage alteration provided ground preparation and control for the late stage silicious ore fluids, which overprinted the earlier alteration and formed more discrete mineralisation along active dilatant structures.
Ore types include silica replaced carbonate veins with free milling gold, siliceous replacement-type mineralization (rich with arsenopyrite) marginal to veins, broad disseminated sulphide mineralisation along major shears, and some minor sulphidised chemical sediment-hosted ore.

Reserves: Total proven and probable reserves as at June 30, 2016, were estimated at 7.55-million tonnes grading 8.36 g/t gold.

Resources: Total measured and indicated resources as at June 30, 2016, were estimated at 4.48-million tonnes grading 16/79 g/t gold. Inferred resources were estimated at 4.58-million tonnes grading 17.11 g/t gold.

Mining Method: Underground using overhand cut and fill, underhand cut and fill, and long hole.

Major Infrastructure and Equipment: Innovative mining techniques have improved efficiency, such as a wet shotcrete system and the use of larger trucks, electric man carriers and a portable diamond drill mounted on a jumbo carrier. The operation is supported by two mill processing facilities, providing a total milling capacity of 3 100 t/d, including crushing, processing and pastefill plants. The processing plant's operations consist of grinding, gravity concentrating, leaching, carbon-in-pulp, carbon elution and reactivation, electrowinning, bullion smelting/refining and cyanide destruction, flotation and concentrate handling – all of which are required to recover the gold in Red Lake’s ore types.

Prospects: Continued transition to mechanised mining, bulk mining and material movement automation is expected to result in lower grades and lower mining costs.

The Cochenour/Bruce Channel deposit is key to plans for future consolidation. The work on enlarging and upgrading the existing Cochenour shaft has been completed and a 6 km haulage drift now connects the existing Red Lake underground infrastructure with Cochenour. The haulage drift will enable the efficient hauling of Cochenour/Bruce Channel ore to the Campbell mine for processing at the existing mill. The drift also extends exploration to more than 6 km of untested ground in one of the world’s richest gold districts.

Contact Person: Investor enquiries Lynette Gould.

Contact Details:
Goldcorp – Red Lake Gold Mines
Tel +1 807 735 2077
Fax +1 807 735 2765
Email RLGM.HR@goldcorp.com
Website http://www.goldcorp.com