North Tadjoura Complex, Tadjourah Region, Djiboutii
| Regional Level Types | |
|---|---|
| North Tadjoura Complex | Complex |
| Tadjourah Region | Region |
| Djibouti | Country |
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Latitude & Longitude (WGS84):
12° North , 42° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~62km
Type:
Age:
14.2 to 9.7 Ma
Geologic Time:
Reference for age:
Varet, J. (1978) Geology of Central and Southern Afar (Ethiopia and Djibouti Republic). Editions du Centre Nationale de la Recherche Scientifique, Paris. (Explanation accompanying Geological map of central and southern Afar. 1:500000).
Köppen climate type:
Mindat Locality ID:
406283
Long-form identifier:
mindat:1:2:406283:0
GUID (UUID V4):
6fc89470-2f1b-44db-a1a2-6858f5348c80
A sequence of thick rhyolitic flows, domes, dikes and pyroclastic rocks, predominantly of peralkaline composition, but some 30% of the sequence consists of flows of basaltic and intermediate rocks, is situated over a large area extending from the vicinity of Tadjoura northwards to the Ethiopian border.
Approx coords range: 11º40'-12º35'N; 42º40'-43º15'E.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
11 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 DiagramDetailed Mineral List:
| ⓘ Aegirine Formula: NaFe3+Si2O6 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Aenigmatite Formula: Na4[Fe2+10Ti2]O4[Si12O36] Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Arfvedsonite Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Fayalite Formula: Fe2+2SiO4 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Hedenbergite Formula: CaFe2+Si2O6 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Magnetite var. Titanium-bearing Magnetite Formula: Fe2+(Fe3+,Ti)2O4 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Quartz Formula: SiO2 Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Sanidine Formula: K(AlSi3O8) Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ 'Sodic plagioclase' Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Titanite Formula: CaTi(SiO4)O Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
| ⓘ Zircon Formula: Zr(SiO4) Reference: Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., & Piguet, P. (1994). Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576
Gadalia, A. L. A. N., & Varet, J. (1983). Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139
Richard, O. 1985. Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978). Geology of central and southern Afar:(Ethiopia and Djibouti Republic). Ed. du Centre nationale de la recherche scient.. (Explanation accompanying Geological map of central and southern Afar. 1:500000). |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | var. Titanium-bearing Magnetite | 4.BB.05 | Fe2+(Fe3+,Ti)2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Aegirine | 9.DA.25 | NaFe3+Si2O6 |
| ⓘ | Aenigmatite | 9.DH.40 | Na4[Fe2+10Ti2]O4[Si12O36] |
| ⓘ | Arfvedsonite | 9.DE.25 | [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
| ⓘ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ | Fayalite | 9.AC.05 | Fe2+2SiO4 |
| ⓘ | Hedenbergite | 9.DA.15 | CaFe2+Si2O6 |
| ⓘ | Sanidine | 9.FA.30 | K(AlSi3O8) |
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
| ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| ⓘ | 'Sodic plagioclase' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| H | ⓘ Arfvedsonite | [Na][Na2][Fe42+Fe3+]Si8O22(OH)2 |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| O | ⓘ Fayalite | Fe22+SiO4 |
| O | ⓘ Sanidine | K(AlSi3O8) |
| O | ⓘ Hedenbergite | CaFe2+Si2O6 |
| O | ⓘ Aegirine | NaFe3+Si2O6 |
| O | ⓘ Arfvedsonite | [Na][Na2][Fe42+Fe3+]Si8O22(OH)2 |
| O | ⓘ Aenigmatite | Na4[Fe102+Ti2]O4[Si12O36] |
| O | ⓘ Magnetite var. Titanium-bearing Magnetite | Fe2+(Fe3+,Ti)2O4 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| F | Fluorine | |
| F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | ⓘ Aegirine | NaFe3+Si2O6 |
| Na | ⓘ Arfvedsonite | [Na][Na2][Fe42+Fe3+]Si8O22(OH)2 |
| Na | ⓘ Aenigmatite | Na4[Fe102+Ti2]O4[Si12O36] |
| Mg | Magnesium | |
| Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Al | ⓘ Sanidine | K(AlSi3O8) |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Si | ⓘ Fayalite | Fe22+SiO4 |
| Si | ⓘ Sanidine | K(AlSi3O8) |
| Si | ⓘ Hedenbergite | CaFe2+Si2O6 |
| Si | ⓘ Aegirine | NaFe3+Si2O6 |
| Si | ⓘ Arfvedsonite | [Na][Na2][Fe42+Fe3+]Si8O22(OH)2 |
| Si | ⓘ Aenigmatite | Na4[Fe102+Ti2]O4[Si12O36] |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| K | ⓘ Sanidine | K(AlSi3O8) |
| Ca | Calcium | |
| Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Hedenbergite | CaFe2+Si2O6 |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ti | Titanium | |
| Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Ti | ⓘ Aenigmatite | Na4[Fe102+Ti2]O4[Si12O36] |
| Ti | ⓘ Magnetite var. Titanium-bearing Magnetite | Fe2+(Fe3+,Ti)2O4 |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Fe | ⓘ Fayalite | Fe22+SiO4 |
| Fe | ⓘ Hedenbergite | CaFe2+Si2O6 |
| Fe | ⓘ Aegirine | NaFe3+Si2O6 |
| Fe | ⓘ Arfvedsonite | [Na][Na2][Fe42+Fe3+]Si8O22(OH)2 |
| Fe | ⓘ Aenigmatite | Na4[Fe102+Ti2]O4[Si12O36] |
| Fe | ⓘ Magnetite var. Titanium-bearing Magnetite | Fe2+(Fe3+,Ti)2O4 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
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, p. 53.
Deniel, C., Vidal, P., Coulon, C., Vellutini, P. J., Piguet, P. (1994) Temporal evolution of mantle sources during continental rifting: the volcanism of Djibouti (Afar). Journal of Geophysical Research: Solid Earth, 99(B2), 2853-2869. doi.org/10.1029/93JB02576.
Gadalia, A.L.A.N., Varet, J. (1983) Les rhyolites miocènes de l'Est de l'Afar. Bulletin de la Société Géologique de France, 7(2), 139-153. doi.org/10.2113/gssgfbull.S7-XXV.2.139.
Richard, O. (1985) Les formations volcaniques. In: Notice explicative. Carte Geologique de la Republique de Djibouti a 1:100000. Tadjoura. Editions de l'ORSTOM. Institut Francais de Recherche Scientifique pour le Developpment en Cooperation. Paris, 9-37.
Varet, J. (1978) Geology of Central and Southern Afar (Ethiopia and Djibouti Republic). Editions du Centre Nationale de la Recherche Scientifique, Paris. (Explanation accompanying Geological map of central and southern Afar. 1:500000).
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