Ekati Diamond Mine

Ekati Diamond Mine
Jason Pineau, photographer · CC BY-SA 3.0 · source
Name	Ekati Diamond Mine
Location	Lac de Gras, Nunavut (near border with Northwest Territories)
Coordinates	64°40′N 110°11′W
Country	Canada
Owner	Dominion Diamond Mines (formerly BHP, Diavik, Aber, Harry Winston affiliates)
Products	diamonds
Discovery	1991
Opening	1998
Type	open pit and underground

Ekati Diamond Mine Ekati Diamond Mine is a kimberlite-hosted diamond mining complex in the subarctic Canadian Arctic near Lac de Gras. It was Canada’s first surface and underground diamond mine and catalyzed a major expansion of the Canadian mining sector, northern economic development, Indigenous partnership frameworks, and environmental regulatory practice. The project has been central to interactions among resource developers, the territorial administrations of Nunavut and the Northwest Territories, and Indigenous governments such as the Tłı̨chǫ Government and the Akaitcho Treaty 8 First Nations.

Overview

Ekati is located within the Canadian Shield and the Kazan-Selwyn Basin region near Great Slave Lake and the Mackenzie River watershed. The site comprises multiple kimberlite pipes accessed by a combination of open pits and underground declines, supported by all-season infrastructure including an airstrip, winter roads linking to the Dempster Highway and seasonal ice roads, and a camp. Initial project proponents included Chuck Fipke and Stu Blusson with corporate partners such as Aber Resources and BHP Billiton. Subsequent ownership changes involved Harry Winston and later acquisitions by Dominion Diamond Mines and private equity interests, reflecting consolidation in the global diamond industry alongside major players like De Beers and Rio Tinto.

History and Development

Exploration began following kimberlite discoveries by prospectors including Charles Fipke and Stuart Blusson in the late 1980s and early 1990s, against the backdrop of mineral exploration booms contemporaneous with finds in Ekati-adjacent areas such as Diavik and Snap Lake. Regulatory approvals required environmental assessments under frameworks evolved from the Canadian Environmental Assessment Act and territorial land use boards like the Wekʼèezhìı Land and Water Board. Construction commenced in the mid-1990s with financing involving institutions such as the Canada Pension Plan Investment Board and mining financiers like RBC Capital Markets. The mine opened in 1998, initiated full production in 1999, and expanded through phases adding the Misery and Beartooth facilities and underground development at pipes such as Panda and Koala.

Geology and Mineralization

Ekati sits on Archean crystalline basement within the Canadian Shield and contains kimberlite pipes emplaced during the Cretaceous and other Phanerozoic events. Host lithologies include garnet- and ilmenite-bearing peridotitic and eclogitic garnet suites similar to global kimberlite provinces like Kimberley and Lac de Gras kimberlites. Indicator mineral studies leveraged techniques developed by geologists affiliated with Geological Survey of Canada and universities such as the University of British Columbia and McGill University. Diamond grades and sizes vary by pipe, with notable gem-quality output comparable to historical mines like Premier Mine and contemporaries including Diavik Diamond Mine.

Operations and Production

Production methods combine open-pit mining, block caving, and underground decline access to kimberlite bodies, with processing circuits including crushing, dense media separation, X-ray recovery and final security sorting in secure facilities akin to procedures at De Beers Consolidated Mines. Ore transport cycles depend on winter ice roads connecting to logistical hubs like Yellowknife and air transport via charter services often linked to operators such as Air Tindi and Canadian North. Annual output has contributed significantly to Canada’s standing within the global diamond market dominated by companies including Alrosa and Rio Tinto. The operational workforce has included fly-in fly-out personnel, contractors from companies like SNC-Lavalin and Fluor Corporation, and a resident northern camp workforce.

Environmental Management and Monitoring

Environmental stewardship programs at the site employ practices shaped by environmental science institutions such as the Canadian Wildlife Service and regional regulators like the Nunavut Impact Review Board. Monitoring covers water quality in Lac de Gras, fish habitat studies referencing species such as Lake Trout and Arctic Char, and wildlife monitoring for species like Caribou (including the Barren-ground caribou herds), Grizzly bear, and migratory birds regulated under frameworks aligned with the Migratory Birds Convention Act. Tailings management, containment of processed kimberlite (PK), and progressive reclamation plans have been informed by research from organizations such as the Canadian Arctic Resources Committee and the World Wildlife Fund.

Socioeconomic Impact and Indigenous Relations

Ekati’s development catalyzed regional socioeconomic changes including employment, training programs administered with partners like Aurora College and Indigenous and Northern Affairs Canada, and business opportunities for Indigenous-owned suppliers such as Det’on Cho and community corporations in Whati and Behchokǫ̀. Impact and benefit agreements were negotiated with Indigenous groups including the Tłı̨chǫ and Kúélek̨e (Gwich’in) partners, reflecting models used in agreements like those at Diavik Diamond Mine and the Voisey's Bay Mine project. Revenue flows affected territorial fiscal arrangements involving the governments of Nunavut and the Northwest Territories and federal institutions such as the Department of Natural Resources.

Safety and Incidents

Operational safety adheres to occupational standards influenced by regulators such as the Territorial Worker Safety and Compensation Board and federal agencies like Transport Canada for air operations. Incidents over the mine’s history have included workplace injuries, winter-road transport challenges similar to those experienced in projects like Snap Lake Mine, and environmental events prompting investigations by bodies like the Environmental Review Tribunal. Emergency response coordination has involved local search and rescue groups, Royal Canadian Mounted Police detachments, and medical evacuation services linked to providers such as Ornge and regional health authorities.

Category:Diamond mines in Canada Category:Mines in Nunavut Category:1998 establishments in Canada