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Ekati Mine, Lac de Gras, Northwest Territories, Canadai
Regional Level Types
Ekati MineMine
Lac de Gras- not defined -
Northwest Territories- not defined -
CanadaCountry

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Latitude & Longitude (WGS84): 64° 43' 20'' North , 110° 35' 57'' West
Latitude & Longitude (decimal): 64.72250,-110.59944
GeoHash:G#: ce925nrgy
Owned/operated by:Dominion Diamond Mines (100%)
Locality type:Mine
Köppen climate type:Dfc : Subarctic climate


Canada's first diamond mine.
Located near Lac de Gras 300 kilometres (186 mi) north-east of Yellowknife.

This first known kimberlite pipe in Canada was discovered at Pointe Lake in 1991 by Chuck Fipke and Stewart Blusson, who had been prospecting in the region for almost ten years, having found kimberlite indicator minerals as early as 1985.
Between 1998 and 2008, the mine has produced 40 million carats (8,000 kg / 17,636 lb) of diamonds out of six open pits. As the high grade ore close to surface was depleted, development was completed to access the ore utilizing underground methods. Two of the open pits (Panda and Koala) have been converted to underground mines.

3.7 Mct diamonds were produced in 2001.

150 kimberlite pipes (5 mined) on the property with the most important being Panda (3 ha), Koala (5 ha), Beartooth (0,5 ha), Lynx, Fox (largest of the mining development pipes (17 ha), Grizzly, Koala North (0,4 ha), Leslie, Rattler, Anaconda, Gazelle, Misery (1,5 ha), Jay (7 ha), Arnie, Mark, Phoenix, Piranha.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

17 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Diamond
Formula: C
Reference: Rocks & Minerals 81:278-283
Diopside
Formula: CaMgSi2O6
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Dolomite
Formula: CaMg(CO3)2
Reference: Sharygin, I. S., Golovin, A. V., Korsakov, A. V., & Pokhilenko, N. P. (2013). Eitelite in sheared peridotite xenoliths from Udachnaya-East kimberlite pipe (Russia)–a new locality and host rock type. European Journal of Mineralogy, 25(5), 825-834.
Eitelite
Formula: Na2Mg(CO3)2
Reference: Sharygin, I. S., Golovin, A. V., Korsakov, A. V., & Pokhilenko, N. P. (2013). Eitelite in sheared peridotite xenoliths from Udachnaya-East kimberlite pipe (Russia)–a new locality and host rock type. European Journal of Mineralogy, 25(5), 825-834.
Enstatite
Formula: MgSiO3
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Enstatite var: Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
'Fayalite-Forsterite Series'
Reference: Andrew Menzies, Kalle Westerlund, Herman Grütter, John Gurney, Jon Carlson, Agnes Fung, Tom Nowicki (2004) Peridotitic mantle xenoliths from kimberlites on the Ekati Diamond Mine property, N.W.T., Canada: major element compositions and implications for the lithosphere beneath the central Slave craton. Lithos, 77:395–412
Forsterite
Formula: Mg2SiO4
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Andrew Menzies, Kalle Westerlund, Herman Grütter, John Gurney, Jon Carlson, Agnes Fung, Tom Nowicki (2004) Peridotitic mantle xenoliths from kimberlites on the Ekati Diamond Mine property, N.W.T., Canada: major element compositions and implications for the lithosphere beneath the central Slave craton. Lithos, 77:395–412
Halite
Formula: NaCl
Reference: Sharygin, I. S., Golovin, A. V., Korsakov, A. V., & Pokhilenko, N. P. (2013). Eitelite in sheared peridotite xenoliths from Udachnaya-East kimberlite pipe (Russia)–a new locality and host rock type. European Journal of Mineralogy, 25(5), 825-834.
Ilmenite
Formula: Fe2+TiO3
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Norsethite
Formula: BaMg(CO3)2
Reference: Sharygin, I. S., Golovin, A. V., Korsakov, A. V., & Pokhilenko, N. P. (2013). Eitelite in sheared peridotite xenoliths from Udachnaya-East kimberlite pipe (Russia)–a new locality and host rock type. European Journal of Mineralogy, 25(5), 825-834.
'Orthopyroxene Subgroup'
Reference: Andrew Menzies, Kalle Westerlund, Herman Grütter, John Gurney, Jon Carlson, Agnes Fung, Tom Nowicki (2004) Peridotitic mantle xenoliths from kimberlites on the Ekati Diamond Mine property, N.W.T., Canada: major element compositions and implications for the lithosphere beneath the central Slave craton. Lithos, 77:395–412
Periclase
Formula: MgO
Reference: Tappert, R., Stachel, T., Harris, J. W., & Shimizu, N. (2005). Mineral inclusions in diamonds from the Panda kimberlite, Slave Province, Canada. European Journal of Mineralogy, 17(3), 423-440.
Periclase var: Ferropericlase
Formula: (Mg,Fe)O
Reference: Tappert, R., Stachel, T., Harris, J. W., & Shimizu, N. (2005). Mineral inclusions in diamonds from the Panda kimberlite, Slave Province, Canada. European Journal of Mineralogy, 17(3), 423-440.
Perovskite
Formula: CaTiO3
Reference: Tappert, R., Stachel, T., Harris, J. W., & Shimizu, N. (2005). Mineral inclusions in diamonds from the Panda kimberlite, Slave Province, Canada. European Journal of Mineralogy, 17(3), 423-440.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Pyrope
Formula: Mg3Al2(SiO4)3
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Spinel
Formula: MgAl2O4
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.
Sylvite
Formula: KCl
Reference: Sharygin, I. S., Golovin, A. V., Korsakov, A. V., & Pokhilenko, N. P. (2013). Eitelite in sheared peridotite xenoliths from Udachnaya-East kimberlite pipe (Russia)–a new locality and host rock type. European Journal of Mineralogy, 25(5), 825-834.
Zircon
Formula: Zr(SiO4)
Reference: Mundt, J. The EKATI–Kimberlite–Diamond–Mine in Canada.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Diamond1.CB.10aC
Group 3 - Halides
Halite3.AA.20NaCl
Sylvite3.AA.20KCl
Group 4 - Oxides and Hydroxides
Ilmenite4.CB.05Fe2+TiO3
Periclase4.AB.25MgO
var: Ferropericlase4.AB.25(Mg,Fe)O
Perovskite4.CC.30CaTiO3
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
Dolomite5.AB.10CaMg(CO3)2
Eitelite5.AC.05Na2Mg(CO3)2
Norsethite5.AB.30BaMg(CO3)2
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Diopside9.DA.15CaMgSi2O6
Enstatite9.DA.05MgSiO3
var: Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
Forsterite9.AC.05Mg2SiO4
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Pyrope9.AD.25Mg3Al2(SiO4)3
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3
'Orthopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Diamond1.3.6.1C
Group 4 - SIMPLE OXIDES
AX
Periclase4.2.1.1MgO
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Perovskite4.3.3.1CaTiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
Group 9 - NORMAL HALIDES
AX
Halite9.1.1.1NaCl
Sylvite9.1.1.2KCl
Group 14 - ANHYDROUS NORMAL CARBONATES
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Norsethite14.2.2.1BaMg(CO3)2
A2B(XO3)2
Eitelite14.3.2.1Na2Mg(CO3)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Pyrope51.4.3a.1Mg3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Enstatite65.1.2.1MgSiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Mixtures, etc.
Enstatite
var: Bronzite
-(Mg,Fe2+)2[SiO3]2
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3
'Orthopyroxene Subgroup'-
Periclase
var: Ferropericlase
-(Mg,Fe)O

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C DiamondC
C EiteliteNa2Mg(CO3)2
C DolomiteCaMg(CO3)2
C NorsethiteBaMg(CO3)2
OOxygen
O Garnet GroupX3Z2(SiO4)3
O ForsteriteMg2SiO4
O PyropeMg3Al2(SiO4)3
O DiopsideCaMgSi2O6
O IlmeniteFe2+TiO3
O SpinelMgAl2O4
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Enstatite (var: Bronzite)(Mg,Fe2+)2[SiO3]2
O EnstatiteMgSiO3
O ZirconZr(SiO4)
O AlmandineFe32+Al2(SiO4)3
O EiteliteNa2Mg(CO3)2
O DolomiteCaMg(CO3)2
O NorsethiteBaMg(CO3)2
O Periclase (var: Ferropericlase)(Mg,Fe)O
O PerovskiteCaTiO3
O PericlaseMgO
NaSodium
Na EiteliteNa2Mg(CO3)2
Na HaliteNaCl
MgMagnesium
Mg ForsteriteMg2SiO4
Mg PyropeMg3Al2(SiO4)3
Mg DiopsideCaMgSi2O6
Mg SpinelMgAl2O4
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Enstatite (var: Bronzite)(Mg,Fe2+)2[SiO3]2
Mg EnstatiteMgSiO3
Mg EiteliteNa2Mg(CO3)2
Mg DolomiteCaMg(CO3)2
Mg NorsethiteBaMg(CO3)2
Mg Periclase (var: Ferropericlase)(Mg,Fe)O
Mg PericlaseMgO
AlAluminium
Al PyropeMg3Al2(SiO4)3
Al SpinelMgAl2O4
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al AlmandineFe32+Al2(SiO4)3
SiSilicon
Si Garnet GroupX3Z2(SiO4)3
Si ForsteriteMg2SiO4
Si PyropeMg3Al2(SiO4)3
Si DiopsideCaMgSi2O6
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Enstatite (var: Bronzite)(Mg,Fe2+)2[SiO3]2
Si EnstatiteMgSiO3
Si ZirconZr(SiO4)
Si AlmandineFe32+Al2(SiO4)3
ClChlorine
Cl SylviteKCl
Cl HaliteNaCl
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
K SylviteKCl
CaCalcium
Ca DiopsideCaMgSi2O6
Ca DolomiteCaMg(CO3)2
Ca PerovskiteCaTiO3
TiTitanium
Ti IlmeniteFe2+TiO3
Ti PerovskiteCaTiO3
FeIron
Fe IlmeniteFe2+TiO3
Fe Enstatite (var: Bronzite)(Mg,Fe2+)2[SiO3]2
Fe AlmandineFe32+Al2(SiO4)3
Fe Periclase (var: Ferropericlase)(Mg,Fe)O
ZrZirconium
Zr ZirconZr(SiO4)
BaBarium
Ba NorsethiteBaMg(CO3)2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Neoarchean
2500 - 2800 Ma



ID: 646097
Igneous: intrusive; Intrusive: granitic

Age: Neoarchean (2500 - 2800 Ma)

Description: North America, Slave Craton

Comments: Craton and massif; Hoffman et al., 1993; Stubley, 2005; Tella et al., unpublished compilation, 2007-08a

Lithology: Granite, granodiorite, tonalite, quartz diorite, diorite, gabbro

Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. [2]

Neoarchean
2500 - 2800 Ma



ID: 3188269
Archean intrusive rocks

Age: Neoarchean (2500 - 2800 Ma)

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

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