Centred on Ofoud Complex, Arlit, Agadez, Niger, but extending to Tamgak Intrusion, Arlit, Agadez, Niger and Taghmeurt is the ring dike which Moreau et al. 1986 claim is the world's biggest. The dike is 65 km in diameter and average 250 m thick.

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Mineral list contains entries from the region specified including sub-localities

ⓘ 'Sodic amphibole'

Rock Types Recorded

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Rock list contains entries from the region specified including sub-localities

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Detailed Mineral List:

ⓘ 'Sodic amphibole'

Locality: Imaghlane Pluton, Meugueur-Meugueur Ring Dike, Arlit, Agadez, Niger

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.

Moreau, C., Brown, W. L., & Karche, J. P. (1987). Monzo-anorthosite from the Tagueï ring-complex, Aïr, Niger: a hybrid rock with cumulus plagioclase and an infiltrated granitic intercumulus liquid?. Contributions to Mineralogy and Petrology, 95(1), 32-43. https://link.springer.com/content/pdf/10.1007/BF00518028.pdf

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Unclassified
ⓘ	'Sodic amphibole'	-

List of minerals for each chemical element

Localities in this Region

Niger

Agadez
- Arlit
  - Meugueur-Meugueur Ring Dike
    - Imaghlane Pluton

Other Regions, Features and Areas containing this locality

AfricaContinent

African PlateTectonic Plate

Tuareg Shield
- Eastern Hoggar BeltVolcanic Arc

Niger

Agadez
- Aïr MountainsMountain Range

North Africa

Sahara DesertDesert

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

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

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., Brown, W., Demaiffe, D., Dupont, P. L., & Rocci, G. (1986). Un des plus grands ring-dykes du monde: le Meugueur-Meugueur, massif de l'Aïr, République du Niger. Comptes rendus de l'Académie des sciences. Série 2, Mécanique, Physique, Chimie, Sciences de l'univers, Sciences de la Terre, 302(5), 223-226.

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

Moreau, C., Ohnenstetter, D., Diot, H., Demaiffe, D., Brown, W. L., Baer, G., & Heimann, A. (1995). Emplacement of the Meugueur-Meugueur cone-sheet (Niger, W. Africa), one of the world's largest igneous ring-structures. Physics and Chemistry of Dykes, 41-49.

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.224

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