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Dutoitspan Mine, KEM JV Mine (Kimberley Ekapa Mining Joint Venture mine; Kimberley Underground mine), Kimberley, Francis Baard District, Northern Cape, South Africai
Regional Level Types
Dutoitspan MineMine
KEM JV Mine (Kimberley Ekapa Mining Joint Venture mine; Kimberley Underground mine)Mine (Active)
Kimberley- not defined -
Francis Baard DistrictDistrict
Northern CapeProvince
South AfricaCountry

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Key
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Latitude & Longitude (WGS84): 28° 45' 38'' South , 24° 47' 57'' East
Latitude & Longitude (decimal): -28.76074,24.79943
GeoHash:G#: kdcskk62s
Locality type:Mine
Köppen climate type:BSh : Hot semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Kimberley142,089 (2012)4.8km
Ritchie9,960 (2014)36.3km
Barkly West11,621 (2012)36.9km


Located on Dorstfontein farm. A diamond mine in a kimberlite pipe, owned by the De Beers and closed in 2005. The deepest mining level was 870 meters below surface.

In 1974, a miner at Dutoitspan picked up an octahedral diamond of 616 ct. This crystal is the largest diamond ever found in all of the Kimberley mines, and also the largest ever octahedral diamond that has been recovered.

Regions containing this locality

African PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


11 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Afwillite (TL)
Formula: Ca3(HSiO4)2 · 2H2O
Type Locality:
Reference: [Mineralogical Magazine(1925) 20, 277-285; Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]
Armalcolite
Formula: (Mg,Fe2+)Ti2O5
Reference: J. W. Anthony et al.: Handbook of Mineralogy, Vol. 3 (1997), 22
Bultfonteinite
Formula: Ca2(HSiO4)F · H2O
Reference: Parry J, Williams A F, Wright F E (1932) On bultfonteinite, a new fluorine-bearing hydrous calcium silicate from South Africa. Mineralogical Magazine 23, 145-162; Minerals of South Africa
Chromite
Formula: Fe2+Cr3+2O4
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
'Clinopyroxene Subgroup'
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
Diamond
Formula: C
Description: Occurs in kimberlite.
Reference: Dana 7:I:149.
Enstatite
Formula: MgSiO3
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
'Fayalite-Forsterite Series'
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
Ilmenite
Formula: Fe2+TiO3
Reference: J. W. Anthony et al.: Handbook of Mineralogy, Vol. 3 (1997), 22
Pectolite
Formula: NaCa2Si3O8(OH)
Reference: Cairncross photo ID 738550
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
Pyrite
Formula: FeS2
Reference: Minerals of South Africa
Rutile
Formula: TiO2
Reference: J. W. Anthony et al.: Handbook of Mineralogy, Vol. 3 (1997), 22

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Diamond1.CB.10aC
Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Armalcolite4.CB.15(Mg,Fe2+)Ti2O5
Chromite4.BB.05Fe2+Cr3+2O4
Ilmenite4.CB.05Fe2+TiO3
Rutile4.DB.05TiO2
Group 9 - Silicates
Afwillite (TL)9.AG.75Ca3(HSiO4)2 · 2H2O
Bultfonteinite9.AG.80Ca2(HSiO4)F · H2O
Enstatite9.DA.05MgSiO3
Pectolite9.DG.05NaCa2Si3O8(OH)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3

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 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
AB2X5
Armalcolite7.7.1.2(Mg,Fe2+)Ti2O5
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Afwillite (TL)52.4.7.1Ca3(HSiO4)2 · 2H2O
Bultfonteinite52.4.7.2Ca2(HSiO4)F · H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Enstatite65.1.2.1MgSiO3
Single-Width Unbranched Chains, W=1 with chains P=3
Pectolite65.2.1.4aNaCa2Si3O8(OH)
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.
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H AfwilliteCa3(HSiO4)2 · 2H2O
H BultfonteiniteCa2(HSiO4)F · H2O
H PhlogopiteKMg3(AlSi3O10)(OH)2
H PectoliteNaCa2Si3O8(OH)
CCarbon
C DiamondC
OOxygen
O AfwilliteCa3(HSiO4)2 · 2H2O
O BultfonteiniteCa2(HSiO4)F · H2O
O Armalcolite(Mg,Fe2+)Ti2O5
O RutileTiO2
O IlmeniteFe2+TiO3
O EnstatiteMgSiO3
O ChromiteFe2+Cr23+O4
O Garnet GroupX3Z2(SiO4)3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O PectoliteNaCa2Si3O8(OH)
FFluorine
F BultfonteiniteCa2(HSiO4)F · H2O
NaSodium
Na PectoliteNaCa2Si3O8(OH)
MgMagnesium
Mg Armalcolite(Mg,Fe2+)Ti2O5
Mg EnstatiteMgSiO3
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Si AfwilliteCa3(HSiO4)2 · 2H2O
Si BultfonteiniteCa2(HSiO4)F · H2O
Si EnstatiteMgSiO3
Si Garnet GroupX3Z2(SiO4)3
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si PectoliteNaCa2Si3O8(OH)
SSulfur
S PyriteFeS2
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca AfwilliteCa3(HSiO4)2 · 2H2O
Ca BultfonteiniteCa2(HSiO4)F · H2O
Ca PectoliteNaCa2Si3O8(OH)
TiTitanium
Ti Armalcolite(Mg,Fe2+)Ti2O5
Ti RutileTiO2
Ti IlmeniteFe2+TiO3
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe PyriteFeS2
Fe Armalcolite(Mg,Fe2+)Ti2O5
Fe IlmeniteFe2+TiO3
Fe ChromiteFe2+Cr23+O4

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

Quaternary
0 - 2.588 Ma



ID: 3308871

Age: Pleistocene (0 - 2.588 Ma)

Lithology: Sedimentary

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Permian
251.902 - 298.9 Ma



ID: 2230572
Prince Albert Formation of Ecca Group of Karoo Supergroup

Age: Phanerozoic (251.902 - 298.9 Ma)

Stratigraphic Name: Prince Albert Formation

Description: Dark-grey mudrock

Reference: Council for Geoscience. Geologic map of South Africa, 1:1M. National Science Councils of South Africa. [41]

Permian
251.902 - 298.9 Ma



ID: 3189153
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 298.9 Ma)

Stratigraphic Name: Karoo Supergroup

Comments: Karoo Basin

Lithology: Sedimentary 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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Parry, J. and Wright, F.E., (1925). Afwillite, a new hydrous calcium silicate from the Dutoitspan mine, Kimberley, South Africa. Mineralogical Magazine, 20, 277-286.
Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Some Aspects of the Mineralogy and Petrology of Ultramafic Xenoliths in Kimberlite. Contributions to Mineralogy and Petrology 26, 75-123.
Mining Annual Review(1985):147.
Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, 160 pp.
Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Kimberlite-hosted diamond deposits of southern Africa: A review. Ore Geology Reviews 34, 33-75.
Dana 7:I:149.


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