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Letlhakane Mine, Letlhakane, Central District, Botswanai
Regional Level Types
Letlhakane MineMine
LetlhakaneVillage
Central DistrictDistrict
BotswanaCountry

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Latitude & Longitude (WGS84): 21° 31' 9'' South , 25° 41' 20'' East
Latitude & Longitude (decimal): -21.51944,25.68889
GeoHash:G#: ks4m8dd04
Owned/operated by:Debswana Diamond Company Ltd (50%) - a joint venture of De Beers Group of Companies
Locality type:Mine
Köppen climate type:BSh : Hot semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Letlhakane18,136 (2018)15.3km
Orapa9,189 (2013)39.7km


A diamond mine in a kimberlite pipe, owned by Debswana, a 50:50 joint venture of De Beers and the Botswanian government. The deposit was discovered in 1970 and production started in 1973. The mine works two pipes, of which the larger one was mined continuously since the mine was started. The smaller pipe was only worked for a short period of time, from June 1985 to May 1986. While the diamond grade of the pipe is considerably lower than that at Orapa, Letlhakane produces diamonds of higher quality. In 2004, it produced 1.03 million ct from 3.4 million tons of ore. About 40% of the stones are of gem-quality.

The pipe hosts a varied suite of mantle xenoliths, including peridotites, pyroxenites, eclogites, megacrysts and glimmerites.

Located 40 km southeast of the Orapa mine and about 190 km west of Francistown.

Regions containing this locality

African PlateTectonic Plate
Kalahari Desert, AfricaDesert

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


7 valid minerals.

Detailed Mineral List:

'Chrome-Spinel (of Dana)'
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Diamond
Formula: C
Reference: Mining Ann. Review 91985): 147 & 415.
Diopside
Formula: CaMgSi2O6
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Diopside var: Chromian Diopside
Formula: Ca(Mg,Cr)Si2O6
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Enstatite
Formula: MgSiO3
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Forsterite
Formula: Mg2SiO4
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Ilmenite
Formula: Fe2+TiO3
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.
Spinel
Formula: MgAl2O4
Reference: Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Contributions to Mineralogy and Petrology 127, 147-158.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Diamond1.CB.10aC
Group 4 - Oxides and Hydroxides
Ilmenite4.CB.05Fe2+TiO3
Spinel4.BB.05MgAl2O4
Group 9 - Silicates
Diopside9.DA.15CaMgSi2O6
var: Chromian Diopside9.DA.15Ca(Mg,Cr)Si2O6
Enstatite9.DA.05MgSiO3
Forsterite9.AC.05Mg2SiO4
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Chrome-Spinel (of Dana)'-
'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 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
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.
'Chrome-Spinel (of Dana)'-
Diopside
var: Chromian Diopside
-Ca(Mg,Cr)Si2O6
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C DiamondC
OOxygen
O PhlogopiteKMg3(AlSi3O10)(OH)2
O IlmeniteFe2+TiO3
O ForsteriteMg2SiO4
O EnstatiteMgSiO3
O Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
O Garnet GroupX3Z2(SiO4)3
O DiopsideCaMgSi2O6
O SpinelMgAl2O4
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg ForsteriteMg2SiO4
Mg EnstatiteMgSiO3
Mg Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Mg DiopsideCaMgSi2O6
Mg SpinelMgAl2O4
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al SpinelMgAl2O4
SiSilicon
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si ForsteriteMg2SiO4
Si EnstatiteMgSiO3
Si Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Si Garnet GroupX3Z2(SiO4)3
Si DiopsideCaMgSi2O6
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Ca DiopsideCaMgSi2O6
TiTitanium
Ti IlmeniteFe2+TiO3
CrChromium
Cr Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
FeIron
Fe IlmeniteFe2+TiO3

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 - Tertiary
0 - 66 Ma



ID: 3185837
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 66 Ma)

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]

Pleistocene - Paleogene
0.0117 - 66 Ma



ID: 3306660

Age: Cenozoic (0.0117 - 66 Ma)

Lithology: Sedimentary

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

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)
Mining Annual Review (1985): 147 & 415.
Stiefenhofer, J., Viljoen, K.S., and Marsh, J.S. (1997): Petrology and geochemistry of peridotite xenoliths from the Letlhakane kimberlites, Botswana. Contributions to Mineralogy and Petrology 127, 147-158.
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.

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