Westwood gold mine

The Westwood Underground Gold Mine is located on the Doyon property, 2.5 kilometres east of the former Doyon Gold Mine in the Bousquet Township, approximately 40 kilometres east of Rouyn-Noranda and 80 kilometres west of Val d’Or in southwestern Québec, Canada. This area is approximately 420km northwest of Montreal. The Westwood Project covers 1,925 hectares and consists of 120 titles, one mining lease, one surface lease and three tailings leases. The Westwood Project is held 100% by IAMGOLD.

The Doyon-Westwood property is accessible year-round via paved roads.

The 120 km separating Rouyn-Noranda from Val-d’Or is scattered with producing and past-producing mining projects such as: Mouska, Doyon, Bousquet, LaRonde and Lapa.

Communications are via fast network links and water supply facilities are available to the Westwood Project. The nearest active railway line is located less than 10 km south of the project.

History

Westwood began production in the first quarter of 2013. The mine commenced commercial production in July 2014, producing 70,000 ounces in the first two quarters, with an average diluted grade of 7.98 grams of gold per tonne.

Ownership:

100% – IAMGOLD.

Mine Type‎:

Underground

Deposit Type:

VMS, Hydrothermal.

The Westwood Project is part of the Doyon-Bousquet-LaRonde (DBL) mining camp. The project is located within the southern Abitibi Sub-Province, in Archaean volcanic and intrusive rocks of the Bousquet Formation (2701-2696 Ma). The DBL mining camp hosts two world class deposits: the Doyon and LaRonde-Penna mines and is by far the largest Au-Cu-Zn-Ag producing district in Québec.

The Westwood Project area is underlain by meta-volcanics of the Blake River Group and partly by meta-sediments of the Cadillac and Kewagama Groups. Stratigraphy generally strikes east-west (100-110°), dips steeply to moderately (70-80°) towards the south and is interpreted to have a southerly facing direction. The Mooshla intrusive, a synvolcanic differentiated pluton, intrudes the volcanics in the western part of the property. Gold bearing VMS and disseminated sulphide zones occurring in the eastern part of the claims are known as the Warrenmac and Westwood showings, respectively to the west and to the east of the Bousquet Fault. Rocks hosting the Warrenmac-Westwood mineralization are lithologically and geochemically similar to the host rocks of the main sulphide lenses at the LaRonde-Penna mine. The regional foliation strikes east-west, parallel to the stratigraphy, with dips varying from sub-vertical to 70° towards the south. Regional metamorphism is transitional from greenschist to lower amphibolites facies.

Mining Method(s)‎:

Alimak; Longhole stoping.

Processing Method(s):

Ore processing utilizes the pre-existing Doyon carbon-in-pulp (“CIP”) mill complex.

Ore from the Westwood underground is hauled to the Doyon mill (two kilometres away) to be crushed and ground. The ore grinding circuit utilizes a SAG mill and a 1,000 HP ball mill.

Because of its legacy, where the Doyon mill had the capacity to process more than 1 million tonnes per year in the 1990’s, the existing gold recovery circuit has more capacity than required to recover the annual gold production from Westwood, which is expected to peak at about 850,000 tonnes per year. Consequently, Westwood continues to seek opportunities to find additional ore to process in the region surrounding its operation.

Mine Life‎:

2033

Production:

91 kozt Au in 2019

AISC (2019):

$1,079/oz Au

Reserves / Resources (12/31/2019):

1,184 kozt – P&P; 3,165 – MI&I

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