As at 30 June 2011, the Bronzewing Project had 1,067,000oz of JORC compliant gold resources at an average grade of 2.1g/t Au, of which 738,000oz were in the Indicated category and 329,000oz were in the Inferred category.
* Resource estimate by Coffey, 2011, within a $2,000/oz optimised pit shell; ** Resource estimate by Navigator, 2010; *** Resource estimate by Navigator, 2011. (Note: Challenger Pit depleted by Navigator for mining to 30 June 2011); **** Resource estimate by Coffey, 2006, and reported, 2011, beneath a $2,000/oz optimised pit shell and depleted for the Calista underground workings.
The mineral reserves include 540,000oz of JORC compliant ore reserves in the Probable category. These ore reserves are located in the Challenger, Cockburn and Corboys pits. The reserves have an average grade of 1.8g/t.
There is substantial exploration upside at Bronzewing that could further increase reserves and resources and ultimately the life of the mine. Navigator is currently focussing brownfields exploration efforts at Bronzewing on extending the projected mine life by another five years which would extend production out to 2020.