80 km west of Jebel Arkenu, Kufra District, Libya 2 circular intrusions of carbonatitic rocks dome gently dipping Cretaceous sandstones and siltstones. The 2 intrusions are some 5 km apart and both are about 3 km in diameter but dome the associated sediments over 9-10 km.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

8 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Melanocratic nephelinite'

Detailed Mineral List:

ⓘ Aegirine

Formula: NaFe³⁺Si₂O₆

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

ⓘ Ankerite

Formula: Ca(Fe²⁺,Mg)(CO₃)₂

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

Reference: Conticelli, S., Manetti, P., Capaldi, G. & Poli, G. 1995. Petrology, mineralogy and isotopes in olivine mela-nephelinites, basanites and carbonatites from Uwaynat region, south east Libya: inferences on their genesis. Africa Geoscience Review, 2, 227-245. Hunting Geology and Geophysics Limited 1974. Geology of the Jabal Al Uwaynat area, Libyan Arab Republic. Report to Industrial Research Centre, Department of Geological Research and Mining, Tripoli. Boreham Wood, U.K. (unpublished). Conticelli, S., Manetti, P., Capaldi, G. & Poli, G. 1995. Petrology, mineralogy and isotopes in olivine mela-nephelinites, basanites and carbonatites from Uwaynat region, south east Libya: inferences on their genesis. Africa Geoscience Review, 2, 227-245. Hunting Geology and Geophysics Limited 1974. Geology of the Jabal Al Uwaynat area, Libyan Arab Republic. Report to Industrial Research Centre, Department of Geological Research and Mining, Tripoli. Boreham Wood, U.K. (unpublished).

ⓘ Calcite

Formula: CaCO₃

ⓘ 'Fayalite-Forsterite Series'

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

ⓘ 'Mica Group'

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

ⓘ Perovskite

Formula: CaTiO₃

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

ⓘ 'Pyrochlore Group'

Formula: A₂Nb₂(O,OH)₆Z

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

ⓘ Siderite

Formula: FeCO₃

ⓘ Vermiculite

Formula: Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Perovskite	4.CC.30	CaTiO₃
ⓘ	'Pyrochlore Group'	4.00.	A₂Nb₂(O,OH)₆Z
Group 5 - Nitrates and Carbonates
ⓘ	Ankerite	5.AB.10	Ca(Fe²⁺,Mg)(CO₃)₂
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
Group 9 - Silicates
ⓘ	Aegirine	9.DA.25	NaFe³⁺Si₂O₆
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Vermiculite	9.EC.50	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Unclassified Minerals, Rocks, etc.
ⓘ	'Amphibole Supergroup'	-	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Apatite'	-	Ca₅(PO₄)₃(Cl/F/OH)
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Mica Group'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Pyroxene Group'	-	ADSi₂O₆

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
H	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
H	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Siderite	FeCO₃
C	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
O	Oxygen
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
O	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Siderite	FeCO₃
O	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
O	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Aegirine	NaFe³⁺Si₂O₆
O	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
O	ⓘ Pyroxene Group	ADSi₂O₆
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Perovskite	CaTiO₃
F	Fluorine
F	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
F	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Na	Sodium
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Aegirine	NaFe³⁺Si₂O₆
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Mg	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Al	Aluminium
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Al	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Si	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Aegirine	NaFe³⁺Si₂O₆
Si	ⓘ Pyroxene Group	ADSi₂O₆
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
P	Phosphorus
P	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Cl	Chlorine
Cl	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Cl	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
K	Potassium
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Ca	Calcium
Ca	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ca	ⓘ Perovskite	CaTiO₃
Ti	Titanium
Ti	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Ti	ⓘ Perovskite	CaTiO₃
Fe	Iron
Fe	ⓘ Vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Siderite	FeCO₃
Fe	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Fe	ⓘ Aegirine	NaFe³⁺Si₂O₆
Nb	Niobium
Nb	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z

Geochronology

Mineralization age: Oligocene : 28.2 Ma to 27.1 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic Time

Rocks, Minerals and Events

ⓘ Nephelinite	27.1 Ma
ⓘ Basanite	28.2 Ma

References

Sort by

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

Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, 145.

Conticelli, S., Manetti, P., Capaldi, G. & Poli, G. 1995. Petrology, mineralogy and isotopes in olivine mela-nephelinites, basanites and carbonatites from Uwaynat region, south east Libya: inferences on their genesis. Africa Geoscience Review, 2, 227-245.

Hunting Geology and Geophysics Limited 1974. Geology of the Jabal Al Uwaynat area, Libyan Arab Republic. Report to Industrial Research Centre, Department of Geological Research and Mining, Tripoli. Boreham Wood, U.K. (unpublished).

Other Regions, Features and Areas containing this locality

African PlateTectonic Plate

Kufrah basinBasin

North Africa

Sahara DesertDesert

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.

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