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Onganja Mine (Emke Mine; Emka Mine; Otjisongati Mine; Ogonja Mine), Helen Farm 235 (Hellen claim; Parzelle Hellen), Onganja mining area, Seeis, Windhoek Rural, Khomas Region, Namibiai
Regional Level Types
Onganja Mine (Emke Mine; Emka Mine; Otjisongati Mine; Ogonja Mine)Mine
Helen Farm 235 (Hellen claim; Parzelle Hellen)Claim
Onganja mining areaVein
SeeisHamlet
Windhoek RuralConstituency
Khomas RegionRegion
NamibiaCountry

This page kindly sponsored by Don Windeler
Key
Latitude & Longitude (WGS84):
22° 5' 58'' South , 17° 27' 30'' East
Latitude & Longitude (decimal):
Locality type:


The Onganja mine is situated on Helen 235 & in the past ownership changed several times & was also known as Emke, Emka & Otjisongati.

The Onganja mine is situated on the Voitskopf vein which is continuous with the Maygift vein straddling the border between farms Helen 235 & Klein Onganja 148. Other veins in the immediate vicinity are Omahanga, Kronriff, Feldspatriff, Stanley, Kriegsfeldgang & several alphabetical veins A, B, E, F, G, H, L, N, all the veins are grouped as the Onganja mining area. Mineral specimens of cuprite & native copper came mostly from the Voitskopf-Maygift vein system.

Regions containing this locality

African PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


22 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: No reference listed
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Brochantite
Formula: Cu4(SO4)(OH)6
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Calcite
Formula: CaCO3
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.; Rock Currier; Graham, L. T., & Pogson, R. E. (2007). The Albert Chapman Mineral Collection: Australian Museum, Sydney, New South Wales, Australia. Rocks & Minerals, 82(1), 29-39.
Chalcocite
Formula: Cu2S
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Chalcopyrite
Formula: CuFeS2
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
'Chlorite Group'
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: No reference listed; John Sobolewski collection
Copper
Formula: Cu
Reference: No reference listed; No reference listed
Cuprite
Formula: Cu2O
Reference: Graham, L. T., & Pogson, R. E. (2007). The Albert Chapman Mineral Collection: Australian Museum, Sydney, New South Wales, Australia. Rocks & Minerals, 82(1), 29-39.; Cairncross, B. (2012). The Mineral Collection of Desmond Sacco, Johannesburg, South Africa. Rocks & Minerals, 87(5), 410-417.
Cuprite var: Chalcotrichite
Formula: Cu2O
Reference: Rock Currier
Fluorapatite
Formula: Ca5(PO4)3F
Reference: No reference listed; Rock Currier
Goethite
Formula: α-Fe3+O(OH)
Reference: No reference listed
Gold
Formula: Au
Reference: Cairncross, B. (2004) Field Guide To Rocks & Minerals Of Southern Africa.; Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Hematite
Formula: Fe2O3
Reference: No reference listed; Rock Currier
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Graham, L. T., & Pogson, R. E. (2007). The Albert Chapman Mineral Collection: Australian Museum, Sydney, New South Wales, Australia. Rocks & Minerals, 82(1), 29-39.; Cairncross, B. (2012). The Mineral Collection of Desmond Sacco, Johannesburg, South Africa. Rocks & Minerals, 87(5), 410-417.
Molybdenite
Formula: MoS2
Reference: No reference listed; Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.; Tailby, N., Mavrogenes, J., Hermann, J., & O’Neill, H. (2006). Goldschmidt Conference Abstracts 2006. Geochimica et Cosmochimica Acta, 70, A634-A662.
Pyrite
Formula: FeS2
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Quartz
Formula: SiO2
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.; Rock Currier
Rutile
Formula: TiO2
Reference: [www.johnbetts-fineminerals.com]; No reference listed
'Scapolite'
Reference: Moore, J. M. (2010). Comparative Study Of The Onganja Copper Mine, Namibia: A Link Between Neoproterozoic Mesothermal Cu (− Au) Mineralization In Namibia And Zambia. South African Journal of Geology, 113(4), 445-460.
Siderite
Formula: FeCO3
Reference: No reference listed
Silver
Formula: Ag
Reference: No reference listed
Smithsonite
Formula: ZnCO3
Reference: Keith Compton

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
var: Chalcotrichite4.AA.10Cu2O
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Siderite5.AB.05FeCO3
Smithsonite5.AB.05ZnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Brochantite7.BB.25Cu4(SO4)(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Scapolite'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
AX2
Rutile4.4.1.1TiO2
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 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
Smithsonite14.1.1.6ZnCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Brochantite30.1.3.1Cu4(SO4)(OH)6
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
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 with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
Cuprite
var: Chalcotrichite
-Cu2O
'Scapolite'-

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H AzuriteCu3(CO3)2(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H Goethiteα-Fe3+O(OH)
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H ApatiteCa5(PO4)3(Cl/F/OH)
H BrochantiteCu4(SO4)(OH)6
CCarbon
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
C AzuriteCu3(CO3)2(OH)2
C SideriteFeCO3
C SmithsoniteZnCO3
OOxygen
O CupriteCu2O
O RutileTiO2
O MalachiteCu2(CO3)(OH)2
O CalciteCaCO3
O AzuriteCu3(CO3)2(OH)2
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O FluorapatiteCa5(PO4)3F
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O MagnetiteFe2+Fe23+O4
O QuartzSiO2
O SideriteFeCO3
O Cuprite (var: Chalcotrichite)Cu2O
O SmithsoniteZnCO3
O AlbiteNa(AlSi3O8)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O ApatiteCa5(PO4)3(Cl/F/OH)
O BrochantiteCu4(SO4)(OH)6
FFluorine
F FluorapatiteCa5(PO4)3F
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al AlbiteNa(AlSi3O8)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si QuartzSiO2
Si AlbiteNa(AlSi3O8)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
PPhosphorus
P FluorapatiteCa5(PO4)3F
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S MolybdeniteMoS2
S PyriteFeS2
S ChalcopyriteCuFeS2
S ChalcociteCu2S
S BrochantiteCu4(SO4)(OH)6
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CaCalcium
Ca CalciteCaCO3
Ca FluorapatiteCa5(PO4)3F
Ca ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Ti RutileTiO2
FeIron
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe MagnetiteFe2+Fe23+O4
Fe SideriteFeCO3
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
CuCopper
Cu CupriteCu2O
Cu MalachiteCu2(CO3)(OH)2
Cu CopperCu
Cu AzuriteCu3(CO3)2(OH)2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu Cuprite (var: Chalcotrichite)Cu2O
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu BrochantiteCu4(SO4)(OH)6
ZnZinc
Zn SmithsoniteZnCO3
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag SilverAg
AuGold
Au GoldAu

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Cairncross, B. and Moir, S. (1996) Famous Mineral Localities: The Onganja Mining District, Namibia. Mineralogical Record, 27(2), 85-97.
Moore, J.M. (2010): Comparative study of the Onganja copper mine, Namibia: a link between Neoproterozoic mesothermal Cu(-Au) mineralization in Namibia and Zambia. South African Journal of Geology, 113, 443–458.


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