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Star Mine, Theunissen kimberlite field, Theunissen, Lejweleputswa District, Free State, South Africai
Regional Level Types
Star MineMine
Theunissen kimberlite field- not defined -
Theunissen- not defined -
Lejweleputswa DistrictDistrict
Free StateProvince
South AfricaCountry

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 28° 14' 23'' South , 26° 7' 35'' East (est.)
Margin of Error:~0km
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Kimberlite 15 km northeast of Theunissen.
A small diamond mine, working a set of four kimberlite dykes. Some parts of the dykes have very high grades, and the diamonds are generally of high quality. In 2004, the mine produced 16,000 cts at an average value of 179 US$/ct.

Regions containing this locality

African PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

'Apatite'
Reference: Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Calcite
Formula: CaCO3
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.; Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Diamond
Formula: C
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.; Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.
Mannardite
Formula: Ba(Ti4+6V3+2)O16
Reference: Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa. Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Perovskite
Formula: CaTiO3
Reference: Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Priderite
Formula: K(Ti4+7Fe3+)O16
Reference: Minerals of South Africa; Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Pyrite
Formula: FeS2
Reference: Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Spinel
Formula: MgAl2O4
Reference: Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456

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
Mannardite4.DK.05bBa(Ti4+6V3+2)O16
Perovskite4.CC.30CaTiO3
Priderite4.DK.05bK(Ti4+7Fe3+)O16
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-
'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
Perovskite4.3.3.1CaTiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
AB8X16
Mannardite7.9.5.1Ba(Ti4+6V3+2)O16
Priderite7.9.4.1K(Ti4+7Fe3+)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
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.
'Apatite'-
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C DiamondC
C CalciteCaCO3
OOxygen
O MannarditeBa(Ti64+V23+)O16
O PrideriteK(Ti74+Fe3+)O16
O Garnet GroupX3Z2(SiO4)3
O CalciteCaCO3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O SpinelMgAl2O4
O PerovskiteCaTiO3
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg SpinelMgAl2O4
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al SpinelMgAl2O4
SiSilicon
Si Garnet GroupX3Z2(SiO4)3
Si PhlogopiteKMg3(AlSi3O10)(OH)2
SSulfur
S PyriteFeS2
KPotassium
K PrideriteK(Ti74+Fe3+)O16
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca PerovskiteCaTiO3
TiTitanium
Ti MannarditeBa(Ti64+V23+)O16
Ti PrideriteK(Ti74+Fe3+)O16
Ti PerovskiteCaTiO3
VVanadium
V MannarditeBa(Ti64+V23+)O16
FeIron
Fe PrideriteK(Ti74+Fe3+)O16
Fe PyriteFeS2
BaBarium
Ba MannarditeBa(Ti64+V23+)O16

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Roger H. Mitchell and Henry O. A. Meyer (1989) Niobian K-Ba-V Titanates from Micaceous Kimberlite, Star Mine, Orange Free State, South Africa. Mineralogical Magazine 53:451-456
Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa.
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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