Canadian Mining Journal

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DIAMONDS: A-21 pipe development okayed at Diavik

NORTHWEST TERRITORIES – The decision has been made to proceed with development of the A-21 pipe at the Diavik diamond mine near Lac de Gras. The mine is a project of Toronto's Dominion Diamond Corp. (40%) and operator Rio Tinto plc (60%).



NORTHWEST TERRITORIES – The decision has been made to proceed with development of the A-21 pipe at the Diavik diamond mine near Lac de Gras. The mine is a project of Toronto’s Dominion Diamond Corp. (40%) and operator Rio Tinto plc (60%).

Total capital cost of the A-21 project is expected to be US$350 million. Production is to begin in late 2018. The pipe contains 3.6 million tonnes of measured resources, at a grade of 2.8 ct per tonne, and 0.4 million tonnes of indicated resources at a grade of 2.6 ct per tonne. An updated resource estimate will be available in Q1 2015.

The A-21 kimberlite is located just south of Diavik’s existing mining operations. A dike must be built to isolate the proposed open pit, but the bulk of the needed infrastructure is already in place from the previous dike construction at the site. The needed licences and agreements are in place.

Dike construction and pre-stripping will take place for four years (2015-18) followed by five years of mining.

Visit www.Diavik.ca for further details.