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'

ⓘ 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

ⓘ 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

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

ⓘ 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: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

ⓘ Nolanite

Formula: V³⁺₈Fe³⁺₂O₁₄(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

ⓘ 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.05	Cu
ⓘ	Lead	1.AA.05	Pb
Group 2 - Sulphides and Sulfosalts
ⓘ	Bornite	2.BA.15	Cu₅FeS₄
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Covellite	2.CA.05a	CuS
ⓘ	Digenite	2.BA.10	Cu₉S₅
ⓘ	Galena	2.CD.10	PbS
ⓘ	Molybdenite	2.EA.30	MoS₂
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Sphalerite	2.CB.05a	ZnS
Group 4 - Oxides and Hydroxides
ⓘ	Curienite	4.HB.15	Pb(UO₂)₂(VO₄)₂ · 5H₂O
ⓘ	Duttonite	4.HE.35	V⁴⁺O(OH)₂
ⓘ	Fourmarierite	4.GB.25	Pb(UO₂)₄O₃(OH)₄ · 4H₂O
ⓘ	Francevillite	4.HB.15	Ba(UO₂)₂(VO₄)₂ · 5H₂O
ⓘ	Goethite	4.00.	α-Fe³⁺O(OH)
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Karelianite	4.CB.05	V³⁺₂O₃
ⓘ	Metavanuralite	4.HB.20	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
ⓘ	Minium	4.BD.05	Pb₃O₄
ⓘ	Montroseite	4.FD.10	(V³⁺,Fe³⁺)O(OH)
ⓘ	Nolanite	4.CB.40	V³⁺₈Fe³⁺₂O₁₄(OH)₂
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Uraninite	4.DL.05	UO₂
ⓘ	var: Pitchblende	4.DL.05	UO₂
ⓘ	Vanuralite	4.HB.20	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
ⓘ	Wölsendorfite	4.GB.30	Pb₇(UO₂)₁₄O₁₉(OH)₄ · 12H₂O
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Rutherfordine	5.EB.05	(UO₂)CO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
ⓘ	Wulfenite	7.GA.05	Pb(MoO₄)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Bassetite	8.EB.10	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
ⓘ	Chervetite	8.FA.15	Pb₂(V₂O₇)
ⓘ	Dewindtite	8.EC.10	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
ⓘ	Torbernite	8.EB.05	Cu(UO₂)₂(PO₄)₂ · 12H₂O
Group 9 - Silicates
ⓘ	Coffinite	9.AD.30	U(SiO₄) · nH₂O
ⓘ	Kasolite	9.AK.15	Pb(UO₂)[SiO₄] · H₂O
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var: Illite	9.EC.15	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ	Roscoelite	9.EC.15	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
ⓘ	Sudoite	9.EC.55	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Uranophane	9.AK.15	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
ⓘ	Zircon	9.AD.30	Zr(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
ⓘ	Copper	1.1.1.3	Cu
ⓘ	Lead	1.1.1.4	Pb
Group 2 - SULFIDES
A_mB_nX_p, with (m+n):p = 2:1
ⓘ	Digenite	2.4.7.3	Cu₉S₅
A_mB_nX_p, with (m+n):p = 3:2
ⓘ	Bornite	2.5.2.1	Cu₅FeS₄
A_mX_p, with m:p = 1:1
ⓘ	Covellite	2.8.12.1	CuS
ⓘ	Galena	2.8.1.1	PbS
ⓘ	Sphalerite	2.8.2.1	ZnS
A_mB_nX_p, with (m+n):p = 1:1
ⓘ	Chalcopyrite	2.9.1.1	CuFeS₂
A_mB_nX_p, with (m+n):p = 1:2
ⓘ	Molybdenite	2.12.10.1	MoS₂
ⓘ	Pyrite	2.12.1.1	FeS₂
Group 4 - SIMPLE OXIDES
A₂X₃
ⓘ	Hematite	4.3.1.2	Fe₂O₃
ⓘ	Ilmenite	4.3.5.1	Fe²⁺TiO₃
ⓘ	Karelianite	4.3.1.4	V³⁺₂O₃
Miscellaneous
ⓘ	Nolanite	4.6.7.1	V³⁺₈Fe³⁺₂O₁₄(OH)₂
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO₂·xH₂O
ⓘ	Uraninite	5.1.1.1	UO₂
AX₂O₇·xH₂O
ⓘ	Wölsendorfite	5.4.3.2	Pb₇(UO₂)₁₄O₁₉(OH)₄ · 12H₂O
Miscellaneous
ⓘ	Fourmarierite	5.9.2.1	Pb(UO₂)₄O₃(OH)₄ · 4H₂O
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
ⓘ	Goethite	6.1.1.2	α-Fe³⁺O(OH)
ⓘ	Montroseite	6.1.1.4	(V³⁺,Fe³⁺)O(OH)
X(OH)₂
ⓘ	Duttonite	6.2.7.1	V⁴⁺O(OH)₂
Group 7 - MULTIPLE OXIDES
AB₂X₄
ⓘ	Minium	7.2.8.1	Pb₃O₄
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO₃)
ⓘ	Calcite	14.1.1.1	CaCO₃
ⓘ	Rutherfordine	14.1.4.1	(UO₂)CO₃
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO₄
ⓘ	Baryte	28.3.1.1	BaSO₄
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
Miscellaneous
ⓘ	Chervetite	38.5.5.1	Pb₂(V₂O₇)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB₂(XO₄)₂·xH₂O, containing (UO₂)²⁺
ⓘ	Bassetite	40.2a.16.1	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
ⓘ	Curienite	40.2a.27.2	Pb(UO₂)₂(VO₄)₂ · 5H₂O
ⓘ	Francevillite	40.2a.27.1	Ba(UO₂)₂(VO₄)₂ · 5H₂O
ⓘ	Torbernite	40.2a.13.1	Cu(UO₂)₂(PO₄)₂ · 12H₂O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A₅(XO₄)₃Z_q
ⓘ	Fluorapatite	41.8.1.1	Ca₅(PO₄)₃F
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)₇(XO₄)₄Z_q·xH₂O
ⓘ	Dewindtite	42.9.8.1	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
(AB)₃(XO₄)₂Z_q·xH₂O
ⓘ	Metavanuralite	42.11.13.2	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
ⓘ	Vanuralite	42.11.13.1	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO₄
ⓘ	Wulfenite	48.1.3.1	Pb(MoO₄)
Group 51 - NESOSILICATES Insular SiO₄ Groups Only
Insular SiO₄ Groups Only with cations in >[6] coordination
ⓘ	Coffinite	51.5.2.4	U(SiO₄) · nH₂O
ⓘ	Zircon	51.5.2.1	Zr(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
ⓘ	Titanite	52.4.3.1	CaTi(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)
ⓘ	Kasolite	53.3.1.1	Pb(UO₂)[SiO₄] · H₂O
ⓘ	Uranophane	53.3.1.2	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
ⓘ	Muscovite	71.2.2a.1	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var: Illite	71.2.2d.2	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ	Roscoelite	71.2.2a.4	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
ⓘ	Sudoite	71.4.1.3	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO₂ with [4] coordinated Si
ⓘ	Quartz	75.1.3.1	SiO₂
Unclassified Minerals, Mixtures, etc.
ⓘ	'Albite-Anorthite Series'	-
ⓘ	'Chlorite Group'	-
ⓘ	Uraninite var: Pitchblende	-	UO₂

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Wölsendorfite	Pb₇(UO₂)₁₄O₁₉(OH)₄ · 12H₂O
H	ⓘ Coffinite	U(SiO₄) · nH₂O
H	ⓘ Montroseite	(V³⁺,Fe³⁺)O(OH)
H	ⓘ Roscoelite	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Duttonite	V⁴⁺O(OH)₂
H	ⓘ Nolanite	V₈³⁺Fe₂³⁺O₁₄(OH)₂
H	ⓘ Vanuralite	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
H	ⓘ Metavanuralite	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
H	ⓘ Dewindtite	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
H	ⓘ Kasolite	Pb(UO₂)[SiO₄] · H₂O
H	ⓘ Francevillite	Ba(UO₂)₂(VO₄)₂ · 5H₂O
H	ⓘ Curienite	Pb(UO₂)₂(VO₄)₂ · 5H₂O
H	ⓘ Torbernite	Cu(UO₂)₂(PO₄)₂ · 12H₂O
H	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
H	ⓘ Sudoite	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
H	ⓘ Bassetite	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
H	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
H	ⓘ Fourmarierite	Pb(UO₂)₄O₃(OH)₄ · 4H₂O
H	ⓘ Goethite	α-Fe³⁺O(OH)
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Rutherfordine	(UO₂)CO₃
O	Oxygen
O	ⓘ Uraninite	UO₂
O	ⓘ Baryte	BaSO₄
O	ⓘ Wölsendorfite	Pb₇(UO₂)₁₄O₁₉(OH)₄ · 12H₂O
O	ⓘ Coffinite	U(SiO₄) · nH₂O
O	ⓘ Montroseite	(V³⁺,Fe³⁺)O(OH)
O	ⓘ Roscoelite	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Duttonite	V⁴⁺O(OH)₂
O	ⓘ Nolanite	V₈³⁺Fe₂³⁺O₁₄(OH)₂
O	ⓘ Chervetite	Pb₂(V₂O₇)
O	ⓘ Vanuralite	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
O	ⓘ Metavanuralite	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
O	ⓘ Dewindtite	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
O	ⓘ Kasolite	Pb(UO₂)[SiO₄] · H₂O
O	ⓘ Wulfenite	Pb(MoO₄)
O	ⓘ Francevillite	Ba(UO₂)₂(VO₄)₂ · 5H₂O
O	ⓘ Karelianite	V₂³⁺O₃
O	ⓘ Uraninite (var: Pitchblende)	UO₂
O	ⓘ Curienite	Pb(UO₂)₂(VO₄)₂ · 5H₂O
O	ⓘ Torbernite	Cu(UO₂)₂(PO₄)₂ · 12H₂O
O	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Sudoite	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
O	ⓘ Bassetite	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
O	ⓘ Rutherfordine	(UO₂)CO₃
O	ⓘ Minium	Pb₃O₄
O	ⓘ Fourmarierite	Pb(UO₂)₄O₃(OH)₄ · 4H₂O
O	ⓘ Goethite	α-Fe³⁺O(OH)
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Mg	Magnesium
Mg	ⓘ Sudoite	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
Al	Aluminium
Al	ⓘ Roscoelite	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Vanuralite	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
Al	ⓘ Metavanuralite	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
Al	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Al	ⓘ Sudoite	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Coffinite	U(SiO₄) · nH₂O
Si	ⓘ Roscoelite	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Kasolite	Pb(UO₂)[SiO₄] · H₂O
Si	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Sudoite	Mg₂Al₃(Si₃Al)O₁₀)(OH)₈
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
P	Phosphorus
P	ⓘ Dewindtite	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
P	ⓘ Torbernite	Cu(UO₂)₂(PO₄)₂ · 12H₂O
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Bassetite	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
S	Sulfur
S	ⓘ Baryte	BaSO₄
S	ⓘ Galena	PbS
S	ⓘ Pyrite	FeS₂
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Molybdenite	MoS₂
S	ⓘ Covellite	CuS
S	ⓘ Digenite	Cu₉S₅
S	ⓘ Bornite	Cu₅FeS₄
S	ⓘ Sphalerite	ZnS
K	Potassium
K	ⓘ Roscoelite	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Muscovite (var: Illite)	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
Ti	Titanium
Ti	ⓘ Titanite	CaTi(SiO₄)O
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
V	Vanadium
V	ⓘ Montroseite	(V³⁺,Fe³⁺)O(OH)
V	ⓘ Roscoelite	K(V³⁺,Al)₂(AlSi₃O₁₀)(OH)₂
V	ⓘ Duttonite	V⁴⁺O(OH)₂
V	ⓘ Nolanite	V₈³⁺Fe₂³⁺O₁₄(OH)₂
V	ⓘ Chervetite	Pb₂(V₂O₇)
V	ⓘ Vanuralite	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
V	ⓘ Metavanuralite	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
V	ⓘ Francevillite	Ba(UO₂)₂(VO₄)₂ · 5H₂O
V	ⓘ Karelianite	V₂³⁺O₃
V	ⓘ Curienite	Pb(UO₂)₂(VO₄)₂ · 5H₂O
Fe	Iron
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Montroseite	(V³⁺,Fe³⁺)O(OH)
Fe	ⓘ Nolanite	V₈³⁺Fe₂³⁺O₁₄(OH)₂
Fe	ⓘ Bassetite	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Bornite	Cu₅FeS₄
Fe	ⓘ Goethite	α-Fe³⁺O(OH)
Cu	Copper
Cu	ⓘ Torbernite	Cu(UO₂)₂(PO₄)₂ · 12H₂O
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Copper	Cu
Cu	ⓘ Covellite	CuS
Cu	ⓘ Digenite	Cu₉S₅
Cu	ⓘ Bornite	Cu₅FeS₄
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Mo	Molybdenum
Mo	ⓘ Wulfenite	Pb(MoO₄)
Mo	ⓘ Molybdenite	MoS₂
Ba	Barium
Ba	ⓘ Baryte	BaSO₄
Ba	ⓘ Francevillite	Ba(UO₂)₂(VO₄)₂ · 5H₂O
Pb	Lead
Pb	ⓘ Galena	PbS
Pb	ⓘ Wölsendorfite	Pb₇(UO₂)₁₄O₁₉(OH)₄ · 12H₂O
Pb	ⓘ Chervetite	Pb₂(V₂O₇)
Pb	ⓘ Dewindtite	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
Pb	ⓘ Kasolite	Pb(UO₂)[SiO₄] · H₂O
Pb	ⓘ Wulfenite	Pb(MoO₄)
Pb	ⓘ Curienite	Pb(UO₂)₂(VO₄)₂ · 5H₂O
Pb	ⓘ Lead	Pb
Pb	ⓘ Minium	Pb₃O₄
Pb	ⓘ Fourmarierite	Pb(UO₂)₄O₃(OH)₄ · 4H₂O
U	Uranium
U	ⓘ Uraninite	UO₂
U	ⓘ Wölsendorfite	Pb₇(UO₂)₁₄O₁₉(OH)₄ · 12H₂O
U	ⓘ Coffinite	U(SiO₄) · nH₂O
U	ⓘ Vanuralite	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
U	ⓘ Metavanuralite	Al(UO₂)₂(VO₄)₂(OH) · 8H₂O
U	ⓘ Dewindtite	H₂Pb₃(UO₂)₂(PO₄)₄O₄ · 12H₂O
U	ⓘ Kasolite	Pb(UO₂)[SiO₄] · H₂O
U	ⓘ Francevillite	Ba(UO₂)₂(VO₄)₂ · 5H₂O
U	ⓘ Uraninite (var: Pitchblende)	UO₂
U	ⓘ Curienite	Pb(UO₂)₂(VO₄)₂ · 5H₂O
U	ⓘ Torbernite	Cu(UO₂)₂(PO₄)₂ · 12H₂O
U	ⓘ Bassetite	Fe²⁺(UO₂)₂(PO₄)₂ · 10H₂O
U	ⓘ Uranophane	Ca(UO₂)₂(SiO₃OH)₂ · 5H₂O
U	ⓘ Rutherfordine	(UO₂)CO₃
U	ⓘ Fourmarierite	Pb(UO₂)₄O₃(OH)₄ · 4H₂O

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Gauthier-Lafaye, F., Weber, F., Ohmoto, H. (1989) Natural fission reactors of Oklo. Economic Geology: 84(8): 2286-2295. https://doi.org/10.2113/gsecongeo.84.8.2286

Eberly, P. Janeczek, J., Ewing, R.C. (1994) Petrographic Analysis of Samples from the Uranium Deposit at Oklo, Republic of Gabon. Radiochimica Acta: 66/67: 455-461. https://doi.org/10.1524/ract.1994.6667.s1.455

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. (2005) The Workings of an Ancient Nuclear Reactor. Scientific American: 293(5): 82-6, 88, 90-1.

Hidaka, H. (2007) Geochemical characteristics of an ancient nuclear reactor "Oklo". Journal of Nuclear and Radiochemical Sciences: 8: 99-103.

External Links

http://en.wikipedia.org/wiki/Oklo

http://www.curtin.edu.au/curtin/centre/waisrc/OKLO/Where/Where.html

http://jdlc.curtin.edu.au/research/oklo/oklo.cfm

http://www.physics.isu.edu/radinf/Files/Okloreactor.pdf

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Oklo Mine, Franceville, Haut-Ogooué Province, GaboniRegional Level TypesOklo MineMine Franceville- not defined - Haut-Ogooué ProvinceProvince GabonCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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List of minerals arranged by Strunz 10th Edition classification

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Other Regions, Features and Areas containg this locality

Oklo Mine, Franceville, Haut-Ogooué Province, Gabon i
Regional Level Types
Oklo Mine Mine
Franceville - not defined -
Haut-Ogooué Province Province
Gabon Country