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Canada
Ekati Mine

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 Location:
308 km NE from Yellowknife, Northwest Territories, Canada

  Address:
900 – 606 4 Street SW
Calgary
Alberta, Canada
T2P 1T1
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Fax+1-403-910-1934
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Diamond
Mining Method
  • Truck & Shovel / Loader
  • Sub-level Retreat
Production Start...
Mine Life2028
Ekati is Canada’s first surface and underground diamond mine, with production at the mine having commenced in October 1998. Ekati operated continuously until March 2020, when COVID-19 prompted previous owners Dominion to temporarily suspend operations. Ekati recommenced operations in February 2021. There are two active mining operations at Ekati, including the Sable Open Pit and Misery Underground operations. The current mine-life of Ekati, including the addition of a new open pit development at Point Lake, runs to 2028.

Exploration and project evaluation activities are ongoing, including the development of innovative mining techniques that could be used to extract the deeper resources from the Sable Open Pit, Fox Open Pit and Point Lake Open Pit. If successful, the mining of these deeper portions of existing orebodies would extend the life of Ekati.


Owners

Source: p. 1,7
CompanyInterestOwnership
Arctic Canadian Diamond Company Ltd. 100 % Direct
Ekati is 100% owned by Arctic Canadian Diamond Company Limited and is no longer subject to joint venture agreements.

On 14 March, Burgundy Diamond Mines Ltd. announced that it has entered into a binding share purchase agreement with Arctic Canadian Holdings LLC to acquire 100% of the common shares of Arctic Canadian Diamond Company Limited and 100% of the common shares of Arctic Canadian Diamond Marketing N.V.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Kimberlite


Summary:

Bedrock at the Ekati Project is dominated by Archean granitoids, intruded by metagreywackes of the YK Supergroup and transected by Proterozoic mafic dykes. No younger cover sediments are preserved. Bedrock is overlain by Quaternary glacial deposits which are generally less than 5 m thick.

The 45 to 75 Ma kimberlites, part of the Lac de Gras kimberlite field, intrude both the granitoids and metasediments. The kimberlites are mostly small pipe-like bodies (surface area predominantly <3 ha but can reach as much as 20 ha) that typically extend to projected depths of 400–600 m below the current land surface. Kimberlite distribution is controlled by fault zones, fault intersections and dyke swarms.

The kimberlites are made up almost exclusively of volcaniclastic olivine-rich volcaniclastic kimberlite (VK), with lesser mud-rich, resedimented volcaniclastic kimberlite (RVK) and primary volcaniclastic kimberlite (PVK). In rare cases (e.g. Pigeon), pipes are dominated by or include significant proportions of magmatic kimberlite (MK). Economic mineralization is mostly limited to olivine-rich resedimented volcaniclastic and primary volcaniclastic types.

Diamond grades are highly variable. Estimated average grades for kimberlites that have been bulk sampled range from less than 0.05 cpt to more than 4 cpt.


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level Retreat


Summary:

Ore Reserves that are mined or will be mined using open pit methods include Sable and Point Lake. Sable open pit designs assumed dilution of 6% waste and mining recovery of 98% diluted material. The Point Lake open pit design assumes dilution of 2% waste and mining recovery of 98% diluted material.

Ore Reserves that are mined or will be mined using underground methods include Misery and Fox. The underground design for Misery is based on sublevel retreat with 25 m levels assuming an overall dilution of 12% waste and overall mining recovery of 94% of diluted material. Conceptual designs for Fox Underground are based on inclined cave mining method.

The Sable Open Pit is a 60,000 tonne per day (tpd) operation providing 10,500 tpd of kimberlite ore feed to the plant. The Misery Underground operation, which ramped up in 2021, utilizes a sublevel retreat mining method at a nominal mining rate of 3,000 tpd providing 2,750 tpd of ore to the process plant.

At the Ekati Diamond Mine, miners use two methods to remove the diamond-rich kimberlite ore from the ground: open pit mining and underground mining. In open pit mines, workers remove waste rock and earth to get to the kimberlite pipe using digging equipment and explosives. In underground mines, spiral-shaped tunnels are built to allow mining equipment to drill, blast, dig, and haul the ore from deeper parts of the kimberlite pipes.

The Ekati Diamond Mine plan involves bringing pits and un ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits20222017201620152014
Diamond k carats  ......  Subscription required5,2083,7323,1581,677
All production numbers are expressed as mineral.

Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required4,102,545 t5,036 kt4,649 kt
Waste  ......  Subscription required  ......  Subscription required19,507,195 wmt29,023,894 wmt22,427 kt21,586 kt
Tonnes processed  ......  Subscription required  ......  Subscription required4,102,545 t3.6 Mt2,940 kt3,618 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required10,800 t
Subscription required - Subscription is required.

Reserves at December 31, 2022:
Ore Reserves are calculated using a 1.2 mm (de-grit slotted screen) lower cut-off size with a final recovery using a 1.0 mm cut-off (circular aperture screen), whereas Mineral Resources are calculated using a 0.5 mm (de-grit slotted screen) lower cut-off size.

CategoryTonnage CommodityGradeContained carats
Probable 48.5 Mt Diamond 0.5 carats/t 26.1 M carats
Indicated 137.7 Mt Diamond 1.1 carats/t 147.6 M carats
Inferred 81.7 Mt Diamond 0.6 carats/t 47 M carats

Commodity Production Costs:

CommodityUnits20222017
Cash costs Diamond USD 38.8 / carat  
Total cash costs (sold) Diamond USD  ......  Subscription required
Subscription required - Subscription is required.

Operating Costs:

Units201720162015
Total operating costs ($/t milled) USD 67.587.384.5

Financials:

Units202220172016
Sustaining costs M USD 36   28  
Capital expenditures M USD 241   196.5  
Revenue M USD  ......  Subscription required
Operating Income M USD -97   -13.6  
EBITDA M USD  ......  Subscription required 64.9   129.1  
Subscription required - Subscription is required



Heavy Mobile Equipment:
HME TypeModelSizeQuantityLeased or
Contractor
Ref. Date
Dozer ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Drill ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Drill ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Drill ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Drill ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Drill (long hole) ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Drill jumbo (two boom) ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Excavator ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Excavator ....................... Subscription required 11 cu. m ....................... Subscription required Leased Jul 31, 2016
Excavator ....................... Subscription required 10 cu. m ....................... Subscription required Leased Jul 31, 2016
Excavator ....................... Subscription required 4.4 cu. m ....................... Subscription required Leased Jul 31, 2016
Excavator ....................... Subscription required 4.6 cu. m ....................... Subscription required Leased Jul 31, 2016
Grader ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Grader ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Loader ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Loader ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Loader ....................... Subscription required 6.4 ....................... Subscription required Leased Jul 31, 2016
Loader ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Loader (FEL) ....................... Subscription required 9.45 cu. m ....................... Subscription required Leased Jul 31, 2016
Loader (FEL) ....................... Subscription required 17 cu. m ....................... Subscription required Leased Jul 31, 2016
Load-Haul-Dump (LHD) ....................... Subscription required 10.5 t ....................... Subscription required Leased Jul 31, 2016
Load-Haul-Dump (LHD) ....................... Subscription required 8 t ....................... Subscription required Leased Jul 31, 2016
Shovel ....................... Subscription required Leased Mar 14, 2023
Shovel ....................... Subscription required Leased Mar 14, 2023
Shovel ....................... Subscription required ....................... Subscription required Leased Jul 31, 2016
Shovel (hydraulic) ....................... Subscription required 12 cu. m ....................... Subscription required Leased Jul 31, 2016
Truck (haul) ....................... Subscription required 90 t Mar 14, 2023
Truck (haul) ....................... Subscription required 170 t ....................... Subscription required Leased Jul 31, 2016
Truck (haul) ....................... Subscription required 225 t ....................... Subscription required Mar 14, 2023
Truck (haul) ....................... Subscription required 80 t ....................... Subscription required Leased Jul 31, 2016
Truck (haul) ....................... Subscription required Mar 14, 2023
Truck (underground) ....................... Subscription required Leased Mar 14, 2023
Truck (underground) ....................... Subscription required 28 t ....................... Subscription required Leased Jul 31, 2016
Truck (water) ....................... Subscription required 100 t ....................... Subscription required Leased Jul 31, 2016
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017

Corporate Filings & Presentations:

DocumentYear
Press Release 2023
Year-end Mineral Reserves 2023
Other 2022
Other 2022
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Annual Information Form 2017
Annual Report 2017
Project Description 2017
Annual Report 2016
Technical Report 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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