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Abontorok Intrusion, Arlit, Agadez, Nigeri
Regional Level Types
Abontorok IntrusionIntrusion
ArlitDepartment
AgadezRegion
NigerCountry

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Latitude & Longitude (WGS84):
18° 22' 59'' North , 8° 34' 59'' East
Latitude & Longitude (decimal):
18.38333,8.58333
GeoHash:
G#: s5q0e6d4w
GRN:
N13E06
Type:
Intrusion
Age:
399 ± 10 Ma
Geologic Time:
Early/Lower Devonian
Dating method:
Rb-Sr whole rock for syenite-granite breccia
Reference for age:
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
408413
Long-form identifier:
mindat:1:2:408413:9
GUID (UUID V4):
0


Circular, funnel-shaped intrusion 2.6 km in diameter and has low central hill of quartz syenite and syenite breccias surrounded by an arcuate depression underlain principally by anorthosites, which are obscured by recent sediments in the north and east.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 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-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Alkali Feldspar'
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Augite var. Ferroaugite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Clinopyroxene Subgroup'
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Fayalite-Forsterite Series'
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Hastingsite
Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Quartz
Formula: SiO2
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Richterite
Formula: Na(NaCa)Mg5(Si8O22)(OH)2
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
ⓘ Zircon
Formula: Zr(SiO4)
References:
Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘvar. Ferroaugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘHastingsite9.DE.15NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
ⓘRichterite9.DE.20Na(NaCa)Mg5(Si8O22)(OH)2
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Hⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
OOxygen
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)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ⓘ QuartzSiO2
Oⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Oⓘ ZirconZr(SiO4)
Oⓘ Fayalite-Forsterite Series
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Pyroxene GroupADSi2O6
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Oⓘ Augite var. Ferroaugite(CaxMgyFez)(Mgy1Fez1)Si2O6
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Naⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Mgⓘ Fayalite-Forsterite Series
Mgⓘ Augite var. Ferroaugite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)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ⓘ QuartzSiO2
Siⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Siⓘ ZirconZr(SiO4)
Siⓘ Fayalite-Forsterite Series
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Augite var. Ferroaugite(CaxMgyFez)(Mgy1Fez1)Si2O6
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Caⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Caⓘ Augite var. Ferroaugite(CaxMgyFez)(Mgy1Fez1)Si2O6
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)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
Feⓘ Augite var. Ferroaugite(CaxMgyFez)(Mgy1Fez1)Si2O6
ZrZirconium
Zrⓘ ZirconZr(SiO4)

Other Regions, Features and Areas containing this locality

AfricaContinent
African PlateTectonic Plate
Niger
North Africa
West AfricaUN Subregion

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References

Karche, J. P. & Moreau, C. (1977). NOTE PRELIMINAIRE SUR LE MASSIF SUBVOLCANIQUE A STRUCTURE ANNULAIRE D'ABONTOROK (AIR-NIGER). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris, 284D, 1259-1262.
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, Christian (1987) Les complexes anorogéniques á suite anorthositique de l'Aïr (Niger): contribution à l'étude des anorthosites. Bulletin de la Société Géologique de France, S. 8 Vol. III (1). 115-122 doi:10.2113/gssgfbull.III.1.115
Brown, W. L., Moreau, C., & Demaiffe, D. (1989). An anorthosite suite in a ring-complex: crystallization and emplacement of an anorogenic type from Abontorok, Aïr, Niger. Journal of Petrology, 30(6), 1501-1540. doi.org/10.1093/petrology/30.6.1501
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.225
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