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Okorusu Mine (Okarusu Mine), Otjiwarongo District, Otjozondjupa Region, Namibia

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Latitude & Longitude (WGS84): 20° 3' 0'' South , 16° 44' 42'' East
Latitude & Longitude (decimal): -20.05017,16.74513
GeoHash:G#: kk7vvjcrm
Locality type:Mine
Köppen climate type:BSh : Hot semi-arid (steppe) climate


An open pit fluorite mine located 48 (40?) km north of Otjiwarango. Part of an alkaline igneous-carbonatite ring dike complex where fluorite has replaced pegmatitic carbonatite.

Mined since around 1920. Then closed in 1963 (Weninger, 1972). Since 1988 operated by Okorusu Fluorspar (Pty) Ltd. Sold in 1997 to Solvay SA.

The mine is famous for outstanding blue and green fluorite crystals, often with phantoms. The mine management allows a specimen miner (Peter Eysselein) to extract fluorite specimens to be sold on the international market (Brandstetter, 2011).


The Early-Cretaceous alkaline rocks/sövite complex intruded Late Precambrian Damara series (quartzites, marbles and biotite schists). The metasedimentary rocks have been fenitized in the vicinity of the intrusion. Fluorite also replaces host-rocks (marbles and biotite schists).

REE-bearing minerals occur in beforsitic carbonatite dikes and carbonate-fluorite-bearing metasomatites. There HREE content is significant.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Okoruso Mine, Otjiwarongo, Karibib District, Namibia

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


25 valid minerals.

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Description: In sodic fenites associated withpegmatitic carbonatites. In fenites.
Reference: Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Andradite var: Melanite
Formula: Ca3Fe3+2(SiO4)3
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
'Apatite'
Description: In pegmatitic carbonatites and in associated sodic fenites.
Reference: Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
Baryte
Formula: BaSO4
Description: Baryte occurs with fluorite and quartz.
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.; Fluorite: The Collector's Choice. Extra Lapis English No. 9. Cairncross, B. (2004) Field Guide To Rocks & Minerals Of Southern Africa: 47.
'Biotite'
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.; Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Calcite
Formula: CaCO3
Description: In pegmatitic carbonatites and in associated sodic fenites : crystals up to 10 cm diameter. In fenites.
Reference: Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284.; Fluorite: The Collector's Choice. Extra Lapis English No. 9; Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Cancrinite
Formula: (Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Celestine
Formula: SrSO4
Reference: Heinz Mahlzahn (2014) "Neues über die Fluorit Lagerstätte Okorusu in Namibia" - Mineralien Welt 2/2014, 48 - 61.
Chalcopyrite
Formula: CuFeS2
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
Diopside
Formula: CaMgSi2O6
Reference: Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
'Feldspar Group'
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Fluorite
Formula: CaF2
Habit: Cubic (sharp & lustrous)
Colour: Deep sea green to purple
Fluorescence: Brilliant blue (best LW UV; SW UV).
Description: This mine produced some of the finest sea green fluorite crystal specimens in the world. Fluorite replaces calcite in pegmatitic carbonatites and associated sodic fenites, but also host-rock marbles and biotite schists.
Reference: Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284.; Fluorite: The Collector's Choice. Extra Lapis English No. 9; Rustemeyer, P. (2000): Okosuru: Fundstelle attraktiver Fluorite in Namibia. Lapis 25(3), 24-29, 50.; Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Fluorite var: Yttrofluorite
Formula: (Ca1-xYx)F2+x where 0.05< x <0.3
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Galena
Formula: PbS
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
Goethite
Formula: α-Fe3+O(OH)
Description: Replaces pyrite, pyrrhotite and aegirine-augite.
Reference: Fluorite: The Collector's Choice. Extra Lapis English No. 9
Hematite
Formula: Fe2O3
Description: Replaces titanomagnetite in pegmatite carbonatites replaced by fluorite.
Reference: Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284.; Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
Hematite var: Martite
Formula: Fe2O3
Description: Replaces titanomagnetite in pegmatite carbonatites replaced by fluorite.
Reference: Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
'K Feldspar'
Reference: Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284.
Magnetite
Formula: Fe2+Fe3+2O4
Description: In sodic fenites associated with pegmatitic carbonatites. Secondary magnetite after replacement of pyrrhotite by goethite.
Reference: Fluorite: The Collector's Choice. Extra Lapis English No. 9; Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Magnetite var: Titaniferous Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Description: In pegmatitic carbonatites : crystals up to 13 cm diameter. In fenites.
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.; Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
'Manganese Oxides'
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
'Monazite'
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Nepheline
Formula: Na3K(Al4Si4O16)
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Pyrite
Formula: FeS2
Description: In pegmatitic carbonatites and in associated sodic fenites.
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573. ; Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.
'Pyrochlore'
Reference: Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
'Pyroxene Group'
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Pyrrhotite
Formula: Fe7S8
Description: In pegmatitic carbonatites and in associated sodic fenites..
Reference: Journal of Microtextural Mineralogy, 52 (4), 2000, pp. 17-20.; Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Quartz
Formula: SiO2
Reference: Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284.; Fluorite: The Collector's Choice. Extra Lapis English No. 9
Quartz var: Citrine
Formula: SiO2
Reference: various added photos
Sphalerite
Formula: ZnS
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
Strontianite
Formula: SrCO3
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
'Synchysite'
Description: Inclusions.
Reference: Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
Thorite
Formula: Th(SiO4)
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Titanite
Formula: CaTi(SiO4)O
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Xenotime-(Y)
Formula: Y(PO4)
Reference: Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
var: Yttrofluorite3.AB.25(Ca1-xYx)F2+x where 0.05< x <0.3
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
var: Martite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
var: Titaniferous Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
Quartz4.DA.05SiO2
var: Citrine4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Strontianite5.AB.15SrCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Baryte'7.AD.35BaSO4
'Celestine'7.AD.35SrSO4
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
'Aegirine'9.DA.25NaFe3+Si2O6
'Aegirine-augite'9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
'Andradite'9.AD.25Ca3Fe3+2(SiO4)3
var: Melanite9.AD.25Ca3Fe3+2(SiO4)3
'Cancrinite'9.FB.05(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Diopside9.DA.15CaMgSi2O6
Nepheline9.FA.05Na3K(Al4Si4O16)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Thorite9.AD.30Th(SiO4)
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Biotite'-
Feldspar Group-
K Feldspar-
Limonite-(Fe,O,OH,H2O)
Manganese Oxides-
Monazite-
Pyrochlore-
Pyroxene Group-
Synchysite-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Strontianite14.1.3.3SrCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Celestine28.3.1.2SrSO4
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
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
Titanite52.4.3.1CaTi(SiO4)O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Aegirine-augite65.1.3b.2(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Cancrinite76.2.5.3(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Nepheline76.2.1.2Na3K(Al4Si4O16)
Unclassified Minerals, Rocks, etc.
Andradite
var: Melanite
-Ca3Fe3+2(SiO4)3
'Apatite'-
'Biotite'-
'Feldspar Group'-
Fluorite
var: Yttrofluorite
-(Ca1-xYx)F2+x where 0.05< x <0.3
Hematite
var: Martite
-Fe2O3
'K Feldspar'-
'Limonite'-(Fe,O,OH,H2O)
Magnetite
var: Titaniferous Magnetite
-Fe2+(Fe3+,Ti)2O4
'Manganese Oxides'-
'Monazite'-
'Pyrochlore'-
'Pyroxene Group'-
Quartz
var: Citrine
-SiO2
'Synchysite'-
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
H Goethiteα-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
C Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
C StrontianiteSrCO3
OOxygen
O AegirineNaFe3+Si2O6
O Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
O AndraditeCa3Fe23+(SiO4)3
O BaryteBaSO4
O CalciteCaCO3
O Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
O CelestineSrSO4
O Quartz (var: Citrine)SiO2
O DiopsideCaMgSi2O6
O FluorapatiteCa5(PO4)3F
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O Limonite(Fe,O,OH,H2O)
O MagnetiteFe2+Fe23+O4
O Hematite (var: Martite)Fe2O3
O Andradite (var: Melanite)Ca3Fe23+(SiO4)3
O NephelineNa3K(Al4Si4O16)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O QuartzSiO2
O StrontianiteSrCO3
O ThoriteTh(SiO4)
O Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
O TitaniteCaTi(SiO4)O
O Xenotime-(Y)Y(PO4)
FFluorine
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F Fluorite (var: Yttrofluorite)(Ca1-xYx)F2+x where 0.05< x <0.3
NaSodium
Na AegirineNaFe3+Si2O6
Na Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Na Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Na NephelineNa3K(Al4Si4O16)
MgMagnesium
Mg Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mg DiopsideCaMgSi2O6
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Al Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Al Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Al NephelineNa3K(Al4Si4O16)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Si AegirineNaFe3+Si2O6
Si Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Si AndraditeCa3Fe23+(SiO4)3
Si Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Si Quartz (var: Citrine)SiO2
Si DiopsideCaMgSi2O6
Si Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Si NephelineNa3K(Al4Si4O16)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si QuartzSiO2
Si ThoriteTh(SiO4)
Si TitaniteCaTi(SiO4)O
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Xenotime-(Y)Y(PO4)
SSulfur
S BaryteBaSO4
S Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
S CelestineSrSO4
S ChalcopyriteCuFeS2
S GalenaPbS
S PyriteFeS2
S PyrrhotiteFe7S8
S SphaleriteZnS
KPotassium
K NephelineNa3K(Al4Si4O16)
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Ca AndraditeCa3Fe23+(SiO4)3
Ca CalciteCaCO3
Ca Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Ca DiopsideCaMgSi2O6
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Ca TitaniteCaTi(SiO4)O
Ca Fluorite (var: Yttrofluorite)(Ca1-xYx)F2+x where 0.05< x <0.3
TiTitanium
Ti Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
Ti TitaniteCaTi(SiO4)O
FeIron
Fe AegirineNaFe3+Si2O6
Fe Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Fe AndraditeCa3Fe23+(SiO4)3
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe MagnetiteFe2+Fe23+O4
Fe Hematite (var: Martite)Fe2O3
Fe Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
SrStrontium
Sr CelestineSrSO4
Sr StrontianiteSrCO3
YYttrium
Y Xenotime-(Y)Y(PO4)
Y Fluorite (var: Yttrofluorite)(Ca1-xYx)F2+x where 0.05< x <0.3
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS
ThThorium
Th ThoriteTh(SiO4)

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

Ediacaran - Cryogenian
541 - 720 Ma



ID: 3306663

Age: Neoproterozoic (541 - 720 Ma)

Lithology: Sedimentary and volcaniclastic

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

Neoproterozoic
541 - 1000 Ma



ID: 3190685
Neoproterozoic sedimentary rocks

Age: Neoproterozoic (541 - 1000 Ma)

Stratigraphic Name: Damara Supergroup

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)
Einecke, G. (1956)
Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284. [http://www.zobodat.at/pdf/DerKarinthin_66_0001-0036.pdf]
Daul, J., Bauer, K. & Moser, P. (1993): Bergbau in Namiba - Erfahrungen einer Studienreise. Institut für Bergbaukunde, Bergtechnik und Bergwirtschaft, Wissenschaftliche Schriftenreihe No. 3, Leoben, Austria, 130 pp (in German).
Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
Rustemeyer, P. (2000): Okosuru: Fundstelle attraktiver Fluorite in Namibia. Lapis 25(3), 24-29, 50 (in German).
Buhn, B., Rankin, A.H., Schneider, J. and Dulski, P. (2002). The nature of orthomagmatic carbonatitic fluids precipitating REE, Sr-rich fluorite: fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chemical Geology, 186, 75-98.
Orris, G.J., and Grauch, R.I. (2002): Rare earth element mines, deposits, and occurrences. USGS Open-File Report 02-189.
Cairncross, B. (2004) Field Guide To Rocks & Minerals Of Southern Africa: 47.
Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Brandstetter, R. (2011): Aus der Okorusu Mine in Namibia: Neue Fluoritfunde mit spektakulären Phantombildungen. Lapis 36 (9), 13-23; 62.
Van der Meersche, E. & Brandstetter, R. (2011): Sensationell flächenreiche Fluorite aus dem B-Pit der Okorusu Mine, Namibia. Lapis 36 (9), 24-26; 62.
Mineral. Record: 20(5), 396.

External Links



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