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Oklo Mine, Franceville, Haut-Ogooué Province, Gaboni
Regional Level Types
Oklo MineMine
Franceville- not defined -
Haut-Ogooué ProvinceProvince
GabonCountry

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Latitude & Longitude (WGS84): 1° 30' South , 13° 16' East
Latitude & Longitude (decimal): -1.50000,13.26667
GeoHash:G#: kr9rmyumz
Locality type:Mine
Köppen climate type:Aw : Tropical savanna, wet


This mine near the Mouana Mine is the site of over a dozen precambrian natural nuclear reactors. It is particularly known as the "Oklo phenomenon". Secondary enrichment of uranium oxides in cm to meter sized veins moderated by ground water consumed six tons of U-235 and elevated temperatures to a few hundred Celsius. This uranium isotope, normally standing for less than 1% of the uranium ore, is predicted to be at 3% level in Oklo in the beginning (now relatively strongly depleted). Remarkably the non-volatile fission products moved only a few cm in the veins during the last 1.5 billion years!

Gillberg-Wickmann (1983) points at Oklo as the only natural example of a significant isotope fractionaction between U-235 and U-238.

Meshik (2005) states, that (1) U-free Al phosphate minerals from the deposit concentrate the highest amount of xenon found in natural material; (2) once upon a time over 2 tons of plutonium 239 were generated within the deposit.

See also Bangombé, another natural nuclear reactor in the same area.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


43 valid minerals.

Detailed Mineral List:

ⓘ 'Albite-Anorthite Series'
Reference: Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.
ⓘ Baryte
Formula: BaSO4
Reference: Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208
ⓘ Bassetite
Formula: Fe2+(UO2)2(PO4)2 · 10H2O
Reference: Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.
ⓘ Bornite
Formula: Cu5FeS4
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Calcite
Formula: CaCO3
Reference: Econ Geol (1989) 84:2286-2295; Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Chalcopyrite
Formula: CuFeS2
Reference: Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Chervetite
Formula: Pb2(V2O7)
ⓘ 'Chlorite Group'
Reference: Econ Geol (1989) 84:2286-2295; Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.; Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Coffinite
Formula: U(SiO4) · nH2O
Reference: Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Copper
Formula: Cu
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Covellite
Formula: CuS
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Curienite
Formula: Pb(UO2)2(VO4)2 · 5H2O
ⓘ Dewindtite
Formula: H2Pb3(UO2)2(PO4)4O4 · 12H2O
ⓘ Digenite
Formula: Cu9S5
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Duttonite
Formula: V4+O(OH)2
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
Reference: Radiochimica Acta (1996), 74 277-282.; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Fourmarierite
Formula: Pb(UO2)4O3(OH)4 · 4H2O
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Francevillite
Formula: Ba(UO2)2(VO4)2 · 5H2O
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Galena
Formula: PbS
Reference: Lena Zetterström and Torbjörn Sunde (2000). Galena Crystallization and the Origin of Sulfur in the Oklo and Bangombé Natural Reactors: The Effects of a ca. 900 Ma Thermal Event. MRS Proceedings, 663, 953 doi:10.1557/PROC-663-953. ; Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Goethite
Formula: α-Fe3+O(OH)
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Hematite
Formula: Fe2O3
Reference: Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Ilmenite
Formula: Fe2+TiO3
Reference: Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.
ⓘ Karelianite
Formula: V3+2O3
ⓘ Kasolite
Formula: Pb(UO2)[SiO4] · H2O
ⓘ Lead
Formula: Pb
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Metavanuralite
Formula: Al(UO2)2(VO4)2(OH) · 8H2O
ⓘ Minium
Formula: Pb3O4
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Molybdenite
Formula: MoS2
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Montroseite
Formula: (V3+,Fe3+)O(OH)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Econ Geol (1989) 84:2286-2295; H. Isobe, T. Ohnuki, T. Murakami and F. Gauthier-Lafaye (1994). Uranium Redistribution Under Oxidizing Conditions in Oklo Natural Reactor Zone 2, Gabon. MRS Proceedings, 353, 1211 doi:10.1557/PROC-353-1211. ; Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: Econ Geol (1989) 84:2286-2295; H. Isobe, T. Ohnuki, T. Murakami and F. Gauthier-Lafaye (1994). Uranium Redistribution Under Oxidizing Conditions in Oklo Natural Reactor Zone 2, Gabon. MRS Proceedings, 353, 1211 doi:10.1557/PROC-353-1211. ; Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Nolanite
Formula: (V3+,Fe3+,Fe2+,Ti)10O14(OH)2
ⓘ Pyrite
Formula: FeS2
Reference: H. Isobe, T. Ohnuki, T. Murakami and F. Gauthier-Lafaye (1994). Uranium Redistribution Under Oxidizing Conditions in Oklo Natural Reactor Zone 2, Gabon. MRS Proceedings, 353, 1211 doi:10.1557/PROC-353-1211. ; Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Quartz
Formula: SiO2
Reference: Econ Geol (1989) 84:2286-2295; Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.; Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Roscoelite
Formula: K(V3+,Al)2(AlSi3O10)(OH)2
ⓘ Rutherfordine
Formula: (UO2)CO3
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Sphalerite
Formula: ZnS
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Sudoite
Formula: Mg2Al3(Si3Al)O10)(OH)8
Reference: Dymkov, Y., Holliger, P., Pagel, M., Gorshkov, A., and Artyukhina, A. (1997): Mineralium Deposita 32, 617-620.
ⓘ Titanite
Formula: CaTi(SiO4)O
Reference: Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.
ⓘ Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Uraninite
Formula: UO2
Reference: Dymkov, Y., Holliger, P., Pagel, M., Gorshkov, A., and Artyukhina A. (1997): Characterization of a La-Ce-Sr-Ca aluminous hydroxy phosphate in nuclear zone 13 in the Oklo uranium deposit (Gabon). Mineralium Deposita, 32, 617-620.; Econ Geol (1989) 84:2286-2295; Lena Z. Evins, Keld A. Jensen, Rodney C. Ewing, Uraninite recrystallization and Pb loss in the Oklo and Bangombé natural fission reactors, Gabon, Geochimica et Cosmochimica Acta, Volume 69, Issue 6, 15 March 2005, Pages 1589-1606, ISSN 0016-7037, 10.1016/j.gca.2004.07.013.; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Uraninite var: Pitchblende
Formula: UO2
Reference: Econ Geol (1989) 84:2286-2295; Douglas G. Brookins (1982) Migration and retention of elements at the Oklo natural reactor. Environmental Geology Volume 4, Issue 3-4 , pp 201-208; Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Vanuralite
Formula: Al(UO2)2(V2O8)(OH) · 11H2O
ⓘ Wölsendorfite
Formula: Pb7(UO2)14O19(OH)4 · 12H2O
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
ⓘ Wulfenite
Formula: Pb(MoO4)
ⓘ Zircon
Formula: Zr(SiO4)
Reference: Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ'Copper'1.AA.05Cu
ⓘLead1.AA.05Pb
Group 2 - Sulphides and Sulfosalts
ⓘ'Bornite'2.BA.15Cu5FeS4
ⓘ'Chalcopyrite'2.CB.10aCuFeS2
ⓘ'Covellite'2.CA.05aCuS
ⓘ'Digenite'2.BA.10Cu9S5
ⓘ'Galena'2.CD.10PbS
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘSphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
ⓘ'Curienite'4.HB.15Pb(UO2)2(VO4)2 · 5H2O
ⓘ'Duttonite'4.HE.35V4+O(OH)2
ⓘ'Fourmarierite'4.GB.25Pb(UO2)4O3(OH)4 · 4H2O
ⓘ'Francevillite'4.HB.15Ba(UO2)2(VO4)2 · 5H2O
ⓘ'Goethite'4.00.α-Fe3+O(OH)
ⓘ'Hematite'4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘKarelianite4.CB.05V3+2O3
ⓘMetavanuralite4.HB.20Al(UO2)2(VO4)2(OH) · 8H2O
ⓘMinium4.BD.05Pb3O4
ⓘMontroseite4.FD.10(V3+,Fe3+)O(OH)
ⓘNolanite4.CB.40(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
ⓘQuartz4.DA.05SiO2
ⓘUraninite4.DL.05UO2
ⓘvar: Pitchblende4.DL.05UO2
ⓘVanuralite4.HB.20Al(UO2)2(V2O8)(OH) · 11H2O
ⓘWölsendorfite4.GB.30Pb7(UO2)14O19(OH)4 · 12H2O
Group 5 - Nitrates and Carbonates
ⓘ'Calcite'5.AB.05CaCO3
ⓘRutherfordine5.EB.05(UO2)CO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ'Baryte'7.AD.35BaSO4
ⓘWulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ'Bassetite'8.EB.10Fe2+(UO2)2(PO4)2 · 10H2O
ⓘ'Chervetite'8.FA.15Pb2(V2O7)
ⓘ'Dewindtite'8.EC.10H2Pb3(UO2)2(PO4)4O4 · 12H2O
ⓘ'Fluorapatite'8.BN.05Ca5(PO4)3F
ⓘTorbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
ⓘ'Coffinite'9.AD.30U(SiO4) · nH2O
ⓘKasolite9.AK.15Pb(UO2)[SiO4] · H2O
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar: Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘRoscoelite9.EC.15K(V3+,Al)2(AlSi3O10)(OH)2
ⓘSudoite9.EC.55Mg2Al3(Si3Al)O10)(OH)8
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘUranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘZircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
ⓘ'Albite-Anorthite Series'-
ⓘ'Chlorite Group'-

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
ⓘLead1.1.1.4Pb
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
ⓘDigenite2.4.7.3Cu9S5
AmBnXp, with (m+n):p = 3:2
ⓘBornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
ⓘCovellite2.8.12.1CuS
ⓘGalena2.8.1.1PbS
ⓘSphalerite2.8.2.1ZnS
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
A2X3
ⓘHematite4.3.1.2Fe2O3
ⓘIlmenite4.3.5.1Fe2+TiO3
ⓘKarelianite4.3.1.4V3+2O3
Miscellaneous
ⓘNolanite4.6.7.1(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
ⓘUraninite5.1.1.1UO2
AX2O7·xH2O
ⓘWölsendorfite5.4.3.2Pb7(UO2)14O19(OH)4 · 12H2O
Miscellaneous
ⓘFourmarierite5.9.2.1Pb(UO2)4O3(OH)4 · 4H2O
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
ⓘGoethite6.1.1.2α-Fe3+O(OH)
ⓘMontroseite6.1.1.4(V3+,Fe3+)O(OH)
X(OH)2
ⓘDuttonite6.2.7.1V4+O(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
ⓘMinium7.2.8.1Pb3O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
ⓘCalcite14.1.1.1CaCO3
ⓘRutherfordine14.1.4.1(UO2)CO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
ⓘBaryte28.3.1.1BaSO4
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
Miscellaneous
ⓘChervetite38.5.5.1Pb2(V2O7)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
ⓘBassetite40.2a.16.1Fe2+(UO2)2(PO4)2 · 10H2O
ⓘCurienite40.2a.27.2Pb(UO2)2(VO4)2 · 5H2O
ⓘFrancevillite40.2a.27.1Ba(UO2)2(VO4)2 · 5H2O
ⓘTorbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
ⓘFluorapatite41.8.1.1Ca5(PO4)3F
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)7(XO4)4Zq·xH2O
ⓘDewindtite42.9.8.1H2Pb3(UO2)2(PO4)4O4 · 12H2O
(AB)3(XO4)2Zq·xH2O
ⓘMetavanuralite42.11.13.2Al(UO2)2(VO4)2(OH) · 8H2O
ⓘVanuralite42.11.13.1Al(UO2)2(V2O8)(OH) · 11H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
ⓘWulfenite48.1.3.1Pb(MoO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
ⓘCoffinite51.5.2.4U(SiO4) · nH2O
ⓘZircon51.5.2.1Zr(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 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
ⓘKasolite53.3.1.1Pb(UO2)[SiO4] · H2O
ⓘUranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
ⓘMuscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
ⓘvar: Illite71.2.2d.2K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘRoscoelite71.2.2a.4K(V3+,Al)2(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
ⓘSudoite71.4.1.3Mg2Al3(Si3Al)O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
ⓘQuartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
ⓘ'Albite-Anorthite Series'-
ⓘ'Chlorite Group'-
ⓘUraninite
var: Pitchblende		-UO2

List of minerals for each chemical element

HHydrogen
Hⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Hⓘ CoffiniteU(SiO4) · nH2O
Hⓘ CurienitePb(UO2)2(VO4)2 · 5H2O
Hⓘ DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
Hⓘ DuttoniteV4+O(OH)2
Hⓘ FourmarieritePb(UO2)4O3(OH)4 · 4H2O
Hⓘ FrancevilliteBa(UO2)2(VO4)2 · 5H2O
Hⓘ Goethiteα-Fe3+O(OH)
Hⓘ Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ KasolitePb(UO2)[SiO4] · H2O
Hⓘ MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2O
Hⓘ Montroseite(V3+,Fe3+)O(OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
Hⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Hⓘ SudoiteMg2Al3(Si3Al)O10)(OH)8
Hⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Hⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Hⓘ VanuraliteAl(UO2)2(V2O8)(OH) · 11H2O
Hⓘ WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
CCarbon
Cⓘ CalciteCaCO3
Cⓘ Rutherfordine(UO2)CO3
OOxygen
Oⓘ BaryteBaSO4
Oⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Oⓘ CalciteCaCO3
Oⓘ ChervetitePb2(V2O7)
Oⓘ CoffiniteU(SiO4) · nH2O
Oⓘ CurienitePb(UO2)2(VO4)2 · 5H2O
Oⓘ DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
Oⓘ DuttoniteV4+O(OH)2
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ FourmarieritePb(UO2)4O3(OH)4 · 4H2O
Oⓘ FrancevilliteBa(UO2)2(VO4)2 · 5H2O
Oⓘ Goethiteα-Fe3+O(OH)
Oⓘ HematiteFe2O3
Oⓘ Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ KarelianiteV23+O3
Oⓘ KasolitePb(UO2)[SiO4] · H2O
Oⓘ MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2O
Oⓘ MiniumPb3O4
Oⓘ Montroseite(V3+,Fe3+)O(OH)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
Oⓘ Uraninite (var: Pitchblende)UO2
Oⓘ QuartzSiO2
Oⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Oⓘ Rutherfordine(UO2)CO3
Oⓘ SudoiteMg2Al3(Si3Al)O10)(OH)8
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Oⓘ UraniniteUO2
Oⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Oⓘ VanuraliteAl(UO2)2(V2O8)(OH) · 11H2O
Oⓘ WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
Oⓘ WulfenitePb(MoO4)
Oⓘ ZirconZr(SiO4)
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
MgMagnesium
Mgⓘ SudoiteMg2Al3(Si3Al)O10)(OH)8
AlAluminium
Alⓘ Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2O
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Alⓘ SudoiteMg2Al3(Si3Al)O10)(OH)8
Alⓘ VanuraliteAl(UO2)2(V2O8)(OH) · 11H2O
SiSilicon
Siⓘ CoffiniteU(SiO4) · nH2O
Siⓘ Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ KasolitePb(UO2)[SiO4] · H2O
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Siⓘ SudoiteMg2Al3(Si3Al)O10)(OH)8
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Siⓘ ZirconZr(SiO4)
PPhosphorus
Pⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Pⓘ DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
Pⓘ FluorapatiteCa5(PO4)3F
Pⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
SSulfur
Sⓘ BaryteBaSO4
Sⓘ BorniteCu5FeS4
Sⓘ ChalcopyriteCuFeS2
Sⓘ CovelliteCuS
Sⓘ DigeniteCu9S5
Sⓘ GalenaPbS
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
KPotassium
Kⓘ Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
TiTitanium
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
Tiⓘ TitaniteCaTi(SiO4)O
VVanadium
Vⓘ ChervetitePb2(V2O7)
Vⓘ CurienitePb(UO2)2(VO4)2 · 5H2O
Vⓘ DuttoniteV4+O(OH)2
Vⓘ FrancevilliteBa(UO2)2(VO4)2 · 5H2O
Vⓘ KarelianiteV23+O3
Vⓘ MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2O
Vⓘ Montroseite(V3+,Fe3+)O(OH)
Vⓘ Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
Vⓘ RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
Vⓘ VanuraliteAl(UO2)2(V2O8)(OH) · 11H2O
FeIron
Feⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ Goethiteα-Fe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ IlmeniteFe2+TiO3
Feⓘ Montroseite(V3+,Fe3+)O(OH)
Feⓘ Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ CopperCu
Cuⓘ CovelliteCuS
Cuⓘ DigeniteCu9S5
Cuⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
Znⓘ SphaleriteZnS
ZrZirconium
Zrⓘ ZirconZr(SiO4)
MoMolybdenum
Moⓘ MolybdeniteMoS2
Moⓘ WulfenitePb(MoO4)
BaBarium
Baⓘ BaryteBaSO4
Baⓘ FrancevilliteBa(UO2)2(VO4)2 · 5H2O
PbLead
Pbⓘ ChervetitePb2(V2O7)
Pbⓘ CurienitePb(UO2)2(VO4)2 · 5H2O
Pbⓘ DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
Pbⓘ FourmarieritePb(UO2)4O3(OH)4 · 4H2O
Pbⓘ GalenaPbS
Pbⓘ KasolitePb(UO2)[SiO4] · H2O
Pbⓘ LeadPb
Pbⓘ MiniumPb3O4
Pbⓘ WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
Pbⓘ WulfenitePb(MoO4)
UUranium
Uⓘ BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Uⓘ CoffiniteU(SiO4) · nH2O
Uⓘ CurienitePb(UO2)2(VO4)2 · 5H2O
Uⓘ DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2O
Uⓘ FourmarieritePb(UO2)4O3(OH)4 · 4H2O
Uⓘ FrancevilliteBa(UO2)2(VO4)2 · 5H2O
Uⓘ KasolitePb(UO2)[SiO4] · H2O
Uⓘ MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2O
Uⓘ Uraninite (var: Pitchblende)UO2
Uⓘ Rutherfordine(UO2)CO3
Uⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Uⓘ UraniniteUO2
Uⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Uⓘ VanuraliteAl(UO2)2(V2O8)(OH) · 11H2O
Uⓘ WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O

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

Paleoproterozoic
1600 - 2500 Ma



ID: 3187849
Paleoproterozoic sedimentary rocks

Age: Proterozoic (1600 - 2500 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]

Rhyacian
2050 - 2300 Ma



ID: 3310214

Age: Rhyacian (2050 - 2300 Ma)

Lithology: Sedimentary and volcaniclastic

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)
- Econ Geol 84 (1989) 2286-2295.
- Radiochimica Acta 66/67 (1994) 455-461.
- Dymkov, Y., Holliger, P., Pagel, M., Gorshkov, A., and Artyukhina, A. (1997): Characterization of a La-Ce-Sr-Ca aluminous hydroxy phosphate in nuclear zone 13 in the Oklo uranium deposit (Gabon). Mineralium Deposita 32, 617-620.
- Janeczek, J. (1999): Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, 38, 321-392.
- Meshik, A. P. (November 2005): "The Workings of an Ancient Nuclear Reactor". Scientific American
- Hidaka, H. (2007): Geochemical characteristics of an ancient nuclear reactor "Oklo". Journal of Nuclear and Radiochemical Sciences 8, 99-103.

External Links



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