Diavik Diamond Mine

Diavik Diamond Mine
Original uploader was User:Trevor MacInnis at en.wikipedia · Public domain · source
Name	Diavik Diamond Mine
Location	Lac de Gras, Northwest Territories, Canada
Coordinates	64°26′N 110°23′W
Owner	Dominion Diamond Mines / formerly Rio Tinto / Harry Winston
Products	Gem-quality diamonds
Discovery	1991
Opening	2003
Type	Open pit and underground

Diavik Diamond Mine The Diavik Diamond Mine is an open pit and underground diamond mining project located on Lac de Gras in the Northwest Territories of Canada. The operation sits within the Slave Geological Province and has been one of the largest sources of gem-quality gemstones in North America, producing stones sold into markets such as Antwerp diamond district, Mumbai, New York City, and Hong Kong. The site has intersected interests of federal institutions like Indigenous and Northern Affairs Canada, territorial bodies such as the Government of the Northwest Territories, and corporations including Rio Tinto Group, Dominion Diamond Mines, and Harry Winston.

Overview

The project exploits kimberlite pipes discovered in the early 1990s on the tundra near Great Slave Lake and adjacent to Yellowknife, combining surface and subsurface methods similar to operations at Ekati Diamond Mine and international mines like Jwaneng and Orapa. Its infrastructure includes an artificial rock island in Lac de Gras, an all-weather winter road connecting to the Tibbitt to Contwoyto Winter Road, an airstrip used by carriers to Yellowknife Airport and charter operators linked with Air Tindi and North-Wright Airways, and a processing plant modeled on flowsheets used at Diavik-class kimberlite operations. Stakeholders have included the Dogrib Treaty 11 (Akaitcho Treaty), Tłı̨chǫ Government, and mining companies with capital markets presence on the Toronto Stock Exchange and engagement with institutions like the Canadian Northern Economic Development Agency.

History and Development

Exploration began after prospecting campaigns by parties such as Chuck Fipke and Eco Resource Investments led to kimberlite discoveries near Lac de Gras in 1991. Early permitting involved consultations with Tłı̨chǫ and Northwest Territories Métis Nation, regulatory review by Mackenzie Valley Environmental Impact Review Board and approvals under regimes influenced by the Canadian Environmental Assessment Act (1992). Construction commenced in the early 2000s with financing and off-take agreements negotiated among Rio Tinto Group and partners; production began in 2003. Ownership and corporate control evolved through transactions with Aber Resources, Harry Winston, and later Dominion Diamond Mines and ArcelorMittal-linked interests, reflecting patterns seen in mergers like Alrosa-era consolidations and investment by private equity entities involved in mining asset portfolios.

Geology and Diamond Deposits

The project exploits kimberlite pipes within the Slave Craton, a relict fragment of the Precambrian Shield analogous to cratons underlying Kaapvaal Craton and Yilgarn Craton. The kimberlite bodies contain macrocrystic and hypabyssal facies with indicator minerals comparable to those studied at Kirstenbosch-era collections and in academic work by geologists affiliated with Geological Survey of Canada and universities such as University of Alberta and McGill University. Diamond quality ranges from industrial to high-carat gem stones; parcels have been sold through trading hubs like Sotheby's, Christie's, and diamond merchants in Antwerp diamond district. Geochemical sampling, geophysical surveys using magnetics and gravity methods, and core drilling followed protocols established by bodies such as the Canadian Institute of Mining, Metallurgy and Petroleum.

Mining Operations and Processing

Operations combine open pit extraction on shallower kimberlite phases with an underground bulk-sampling and block-cave style development akin to techniques deployed at Jwaneng and large underground operations such as Argyle diamond mine. Ore is transported to a centrally located processing plant where crushing, dense media separation (DMS), x-ray fluorescence sensors, and hand-sorting recover diamonds. The mine’s logistics management coordinates with vendors like Caterpillar Inc., Sandvik, and Metso for heavy equipment and flow-sheet components; power generation has involved co-located diesel and fuel-management systems modeled on Arctic mining installations and monitored by engineering firms with ties to Bechtel and Fluor Corporation.

Environmental Management and Reclamation

Environmental programs were designed to meet terms negotiated with the Mackenzie Valley Environmental Impact Review Board and the Tłı̨chǫ Agreement, addressing impacts on lacustrine systems, permafrost, and wildlife including barren-ground caribou and migratory birds. Mitigation includes an engineered rock island to limit lakebed disturbance, water treatment facilities employing sedimentation and recycling systems, and progressive reclamation plans coordinated with the Gwich'in Tribal Council and territorial regulators. Post-closure scenarios follow frameworks influenced by precedent projects such as Gahcho Kué and guidance from the Canadian Northern Economic Development Agency and environmental NGOs including WWF-Canada in monitoring water quality, benthic communities, and re-establishment of tundra vegetation.

Economic Impact and Ownership

The mine has contributed royalties, employment, and regional procurement to the Northwest Territories economy and to Indigenous corporations such as Akaitcho Territory Government-linked development corporations, with diamond sales participating in global supply chains through houses in Antwerp diamond district, Mumbai, London Diamond District, and Tel Aviv. Ownership shifted from early investors to major mining houses: Aber Resources and Harry Winston were involved in early phases, followed by majority stakes held by Rio Tinto Group and later asset transfers to Dominion Diamond Mines and private consortia. Fiscal arrangements include impact and benefit agreements modeled on templates like the Voisey's Bay agreement and royalty frameworks administered by the Government of the Northwest Territories.

Safety, Workforce, and Community Relations

Safety systems follow standards promulgated by organizations such as the Canadian Centre for Occupational Health and Safety and industry groups like the International Council on Mining and Metals, with training curricula developed in partnership with educational institutions including Aurora College and occupational providers. Workforce composition has included fly-in fly-out personnel using Yellowknife Airport and locally sourced Indigenous workers supported by employment and training commitments negotiated with the Tłı̨chǫ Government and Northwest Territories Métis Nation. Community relations programs cover cultural heritage monitoring, benefit-sharing, and grievance mechanisms coordinated with consensus-based boards similar to those used in projects reviewed by the Mackenzie Valley Review Board.

Category:Diamond mines in Canada Category:Buildings and structures in the Northwest Territories