Westwood Mining Lease - BM1002 (Preissac)

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The Westwood property is part of the Doyon-Bousquet–La Ronde mining camp, located within the Southern Volcanic Zone of the Abitibi Sub-Province. This camp is characterized by a concentration of gold-rich base-metal deposits. The property covers some 20 square kilometres (1993 Ha) and since November 2006 IAMGOLD Corporation holds a 100% interest.

The Westwood Project is located within Archaean volcanic and intrusive rocks of the Bousquet Formation, at the top of the Blake River Group. The Westwood deposit is hosted in a volcanic sequence composed of felsic volcanic rocks (Zone 2 Extension), mafic to intermediate volcanic rocks (North Corridor) and intermediate to felsic volcanic rocks marked by a quartz-muscovite-sericite-calcite-garnet alteration (Westwood-Warrenmac).

The Westwood mineralization consists of gold-sulphide vein-type mineralization such as Zones 1 and 2 at former Doyon Mine (Zone 2 Extension and North Corridor deposits) as well as gold-rich VMS-type semi-massive to massive deposits (Warrenmac deposit on the western side of the Bousquet fault and Westwood deposit on the eastern side of the Bousquet fault) such as the Bousquet and LaRonde deposits. All mineralized lenses are sub-parallel to the stratigraphy (sub-vertical to steeply south dipping).

In October 2010, a fourth resource estimate was prepared based on additional drilling information and resulted in an update to 9.7 M tonnes of inferred resources grading 11.1 g Au/t, or approximately 3.5 million contained ounces of gold, in using a cut-off of 6g Au/t with all lens capped at 15g Au/t and a minimum width (true width) of 2.0 metres (IAMGOLD Corporation, April 1st 2011).

In May 2011, the fifth resource estimate was prepared based on additional drilling information.