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Um Bogma Formation, Um Bogma area, South Sinai Governorate, Egypti
Regional Level Types
Um Bogma FormationFormation
Um Bogma area- not defined -
South Sinai GovernorateGovernorate
EgyptCountry

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Latitude & Longitude (WGS84):
29° 0' 0'' North , 33° 19' 59'' East
Latitude & Longitude (decimal):
29.00000,33.33333
GRN:
N20E21
Type:
Formation
Age:
358.9 ± 0.4 to 323.2 ± 0.4 Ma
Geologic Time:
Mississippian
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
426480
Long-form identifier:
mindat:1:2:426480:7
GUID (UUID V4):
0


Sallam (2020) used XRD to identify some rare minerals that are probably not at the location (incorrect associated minerals).

The Um Bogma Formation is Lower Carboniferous (Middle Visean) in age and forms the main radioactive horizon in Egypt’s Paleozoic record. This formation is exposed at Gabal Allouga, Abu Thor, Wadi El Sahu, and Abu Zarab, reaching a thickness of up to 43 m in Wadi Khaboba. It is subdivided into three members: the lower dolostone, bearing secondary copper and Mn-Fe ore; the middle member, a silty dolomitic limestone deposited under shallow, open-marine conditions, which is rich in fossils and radioactive anomalies; and the upper member, a dolostone with gibbsite. The unit is considered a polymineralized rock because it contains uranium, thorium, copper, manganese, iron, and rare earth elements.
Uranium in the formation is unevenly distributed. Paleokarst dissolution structures in the middle carbonate member have the highest concentrations, which differ in shape, size, and composition. These paleokarsts are filled with lateritic material formed under tropical-to-semi-tropical weathering, providing primary sites for uranium precipitation. Mineralization always appears in the karst fill, distinguishing Um Bogma-type deposits from stratiform or sandstone-hosted types. Iron oxides act as the main geochemical trap for uranium within these fills, with enrichment factors (GEF) far higher than those of clay minerals.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


31 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Antlerite
Formula: Cu3(SO4)(OH)4
ⓘ Atacamite
Formula: Cu2(OH)3Cl
ⓘ Azurite
Formula: Cu3(CO3)2(OH)2
ⓘ Baryte
Formula: BaSO4
ⓘ Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcanthite
Formula: CuSO4 · 5H2O
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcophanite
Formula: ZnMn4+3O7 · 3H2O
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ Covellite
Formula: CuS
ⓘ Cryptomelane
Formula: K(Mn4+7Mn3+)O16
ⓘ Cuprite
Formula: Cu2O
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Hausmannite
Formula: Mn2+Mn3+2O4
ⓘ Hematite
Formula: Fe2O3
ⓘ Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
ⓘ Jacobsite
Formula: Mn2+Fe3+2O4
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ 'Manganese Oxides'
ⓘ Manganite
Formula: Mn3+O(OH)
ⓘ Manjiroite
Formula: Na(Mn4+7Mn3+)O16
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Copper
Formula: Cu
ⓘ Pseudomalachite
Formula: Cu5(PO4)2(OH)4
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Quartz
Formula: SiO2
ⓘ Romanèchite
Formula: (Ba,H2O)2(Mn4+,Mn3+)5O10
ⓘ Todorokite
Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘCovellite2.CA.05aCuS
ⓘPyrite2.EB.05aFeS2
Group 3 - Halides
ⓘAtacamite3.DA.10aCu2(OH)3Cl
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘCuprite4.AA.10Cu2O
ⓘJacobsite4.BB.05Mn2+Fe3+2O4
ⓘHausmannite4.BB.10Mn2+Mn3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘPyrolusite4.DB.05Mn4+O2
ⓘCryptomelane4.DK.05aK(Mn4+7Mn3+)O16
ⓘHollandite4.DK.05aBa(Mn4+6Mn3+2)O16
ⓘManjiroite4.DK.05aNa(Mn4+7Mn3+)O16
ⓘRomanèchite4.DK.10(Ba,H2O)2(Mn4+,Mn3+)5O10
ⓘTodorokite4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
ⓘManganite4.FD.15Mn3+O(OH)
ⓘChalcophanite4.FL.20ZnMn4+3O7 · 3H2O
ⓘBirnessite4.FL.45(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
ⓘAntlerite7.BB.15Cu3(SO4)(OH)4
ⓘChalcanthite7.CB.20CuSO4 · 5H2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘPseudomalachite8.BD.05Cu5(PO4)2(OH)4
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
ⓘ'Manganese Oxides'-

List of minerals for each chemical element

HHydrogen
Hⓘ AntleriteCu3(SO4)(OH)4
Hⓘ AtacamiteCu2(OH)3Cl
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Hⓘ ChalcophaniteZnMn34+O7 · 3H2O
Hⓘ ChalcanthiteCuSO4 · 5H2O
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ GoethiteFe3+O(OH)
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ ManganiteMn3+O(OH)
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PseudomalachiteCu5(PO4)2(OH)4
Hⓘ Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
Hⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
CCarbon
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
Cⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ AntleriteCu3(SO4)(OH)4
Oⓘ AtacamiteCu2(OH)3Cl
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ BaryteBaSO4
Oⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Oⓘ CalciteCaCO3
Oⓘ ChalcophaniteZnMn34+O7 · 3H2O
Oⓘ ChalcanthiteCuSO4 · 5H2O
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ CryptomelaneK(Mn74+Mn3+)O16
Oⓘ CupriteCu2O
Oⓘ DolomiteCaMg(CO3)2
Oⓘ GoethiteFe3+O(OH)
Oⓘ HausmanniteMn2+Mn23+O4
Oⓘ HematiteFe2O3
Oⓘ HollanditeBa(Mn64+Mn23+)O16
Oⓘ JacobsiteMn2+Fe23+O4
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ ManganiteMn3+O(OH)
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ ManjiroiteNa(Mn74+Mn3+)O16
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PseudomalachiteCu5(PO4)2(OH)4
Oⓘ PyrolusiteMn4+O2
Oⓘ QuartzSiO2
Oⓘ Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
Oⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
NaSodium
Naⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Naⓘ ManjiroiteNa(Mn74+Mn3+)O16
Naⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AlAluminium
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
SiSilicon
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
PPhosphorus
Pⓘ PseudomalachiteCu5(PO4)2(OH)4
SSulfur
Sⓘ AntleriteCu3(SO4)(OH)4
Sⓘ BaryteBaSO4
Sⓘ ChalcanthiteCuSO4 · 5H2O
Sⓘ ChalcociteCu2S
Sⓘ CovelliteCuS
Sⓘ PyriteFeS2
ClChlorine
Clⓘ AtacamiteCu2(OH)3Cl
KPotassium
Kⓘ CryptomelaneK(Mn74+Mn3+)O16
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
CaCalcium
Caⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
MnManganese
Mnⓘ Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Mnⓘ ChalcophaniteZnMn34+O7 · 3H2O
Mnⓘ CryptomelaneK(Mn74+Mn3+)O16
Mnⓘ HausmanniteMn2+Mn23+O4
Mnⓘ HollanditeBa(Mn64+Mn23+)O16
Mnⓘ JacobsiteMn2+Fe23+O4
Mnⓘ ManganiteMn3+O(OH)
Mnⓘ ManjiroiteNa(Mn74+Mn3+)O16
Mnⓘ PyrolusiteMn4+O2
Mnⓘ Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
Mnⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
FeIron
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ JacobsiteMn2+Fe23+O4
Feⓘ PyriteFeS2
CuCopper
Cuⓘ AntleriteCu3(SO4)(OH)4
Cuⓘ AtacamiteCu2(OH)3Cl
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ ChalcanthiteCuSO4 · 5H2O
Cuⓘ ChalcociteCu2S
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ CovelliteCuS
Cuⓘ CupriteCu2O
Cuⓘ Native CopperCu
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ PseudomalachiteCu5(PO4)2(OH)4
ZnZinc
Znⓘ ChalcophaniteZnMn34+O7 · 3H2O
SrStrontium
Srⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
BaBarium
Baⓘ BaryteBaSO4
Baⓘ HollanditeBa(Mn64+Mn23+)O16
Baⓘ Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
Baⓘ Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O

Other Regions, Features and Areas containing this locality

African PlateTectonic Plate
Arabian Plate
AsiaContinent

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sallam, O. R. (2020). Origin of Mn-Fe Ore Bearing Radioactive Minerals at Um Bogma Area, Southwestern Sinai, Egypt. Nuclear Sciences Scientific Journal, 9(1), 79-102.
Afify, A. M., Osman, R. A., Wanas, H. A., & Khater, T. M. (2022). Mineralogical and geochemical studies of copper mineralization in the Paleozoic sedimentary section in southwestern Sinai, Egypt. Ore Geology Reviews, 147, 104994.
[1]Abd El-Moghny, Mohamed W.; Helal, Mohamed H.; Elshahat, Osama Ramzy; Abaza, Mohamed Mohamed Fahim; Gabr, Mahmoud Mohamed Mohamed Ali; Fathy, Mohamed; Ayyad, Haitham M. (2026) Secondary Uranium Mineral Assemblages in Carboniferous Paleokarst Infill, Um Bogma Formation, the Southern Tethyan Margin: Implications for the Arabian–Nubian Shield in Mineralogical Characterization and Supergene Enrichment. Minerals, 16 (5). doi:10.3390/min16050558
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