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Adrar Bous alkaline complex, Arlit, Agadez, Nigeri
Regional Level Types
Adrar Bous alkaline complexComplex
ArlitDepartment
AgadezRegion
NigerCountry

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Latitude & Longitude (WGS84):
20° 19' 59'' North , 9° 0' 0'' East
Latitude & Longitude (decimal):
20.33333,9.00000
GeoHash:
G#: s5w7sv9d7
GRN:
N14E06
Type:
Complex
Age:
470 ± 5 Ma
Geologic Time:
Early/Lower Ordovician
Dating method:
Rb-Sr
Reference for age:
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger; consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
241325
Long-form identifier:
mindat:1:2:241325:2
GUID (UUID V4):
0


The most northerly alkaline complex of the Aïr Mountains, measuring 20 x 12 km. Composed of three units: a western arc with adamellites and monzonites, followed to the south, east and west by gabbroic rocks and peralkaline granite and monzonite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


2 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

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
References:
Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9
ⓘ 'Alkali Feldspar'
References:
Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
References:
Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9
ⓘ 'Fayalite-Forsterite Series'
References:
Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9
ⓘ Hastingsite
Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
References:
Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9
ⓘ 'Sodic amphibole'
References:
Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
consequences. Bulletin de la Société géologique de France, 7(6), 941-953. doi.org/10.2113/gssgfbull.S7-XX.6.941
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, J. P., & Vachette, M. (1978). Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘHastingsite9.DE.15NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Sodic amphibole'-

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Oⓘ Fayalite-Forsterite Series
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Siⓘ Fayalite-Forsterite Series
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Feⓘ Fayalite-Forsterite Series

Geochronology

Mineralization age: Paleozoic : 429 ± 4 Ma to 406 ± 11 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 TimeRocks, Minerals and Events
Phanerozoic
 Paleozoic
  Devonian
   Early/Lower Devonian
ⓘ Granite406 ± 11 Ma
    
   
  Silurian
   Wenlock
ⓘ Alkali Feldspar429 ± 4 Ma

Other Regions, Features and Areas containing this locality

AfricaContinent
African PlateTectonic Plate
Niger
North Africa
West AfricaUN Subregion

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

Black, R., Jaujou, M. & Pellaton, C. 1967. Notice explicative sur la carte geologique de l'Aïr à l'échelle du 1/500000. Direction des Mines et de la Geologie. Republique du Niger.
Bowden, P., Van Breemen, O., Hutchinson, J., & Turner, D. C. (1976). Palaeozoic and Mesozoic age trends for some ring complexes in Niger and Nigeria. Nature, 259(5541), 297-299. doi.org/10.1038/259297a0
Karche, Jean-Paul, Vachette, Michelle (1978) Age et migration de l'activite magmatique dans les complexes paleozoiques du Niger. Consequences. Bulletin de la Société Géologique de France, S7-XX (6). 941-953 doi:10.2113/gssgfbull.S7-XX.6.941
Husch, J. M., & Moreau, C. (1982). Geology and major element geochemistry of anorthositic rocks associated with Paleozoic hypabyssal ring complexes, Air massif, Niger, West Africa. Journal of Volcanology and Geothermal Research, 14(1-2), 47-66. doi.org/10.1016/0377-0273(82)90042-7
Moreau, C., Demaiffe, D., Bellion, Y., & Boullier, A. M. (1994). A tectonic model for the location of Palaeozoic ring complexes in Air (Niger, West Africa). Tectonophysics, 234(1-2), 129-146. doi.org/10.1016/0040-1951(94)90208-9
Woolley, A. R. (2001) Alkaline Rocks and Carbonatites of the World, Part 3: Africa - Alkaline Rocks and Carbonatites of the World. The Geological Society of London.p.223
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