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Aksum-Adwa Complex, Tigray Region, Ethiopiai
Regional Level Types
Aksum-Adwa ComplexComplex
Tigray RegionRegion
EthiopiaCountry

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Latitude & Longitude (WGS84):
14° North , 38° East
Latitude & Longitude (decimal):
14.00000,38.00000
GeoHash:
G#: sf7p8swgb
GRN:
N10E26
Type:
Complex
Köppen climate type:
BSh : Hot semi-arid (steppe) climate
Mindat Locality ID:
406538
Long-form identifier:
mindat:1:2:406538:1
GUID (UUID V4):
0d710375-90ad-43d6-9f7c-59ac77f520d2


In an area east and west of Aksum and Adwa and extending for some 230 km about 20 occurrences of peralkaline trachytic lavas are found, several of which are more that 10 km in diameter.
Age possibly Pliocene (Abbate & Sagri in Merla et al. 1979).

Approx coords range: 13º50' - 14º40'N; 37º15' - 39º25'E.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


5 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:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
ⓘ 'Alkali Feldspar'
References:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
References:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
References:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
ⓘ Quartz
Formula: SiO2
References:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
ⓘ Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
References:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
ⓘ Zircon
Formula: Zr(SiO4)
References:
Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.

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)
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘRiebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ QuartzSiO2
Oⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Oⓘ ZirconZr(SiO4)
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
AlAluminium
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ NephelineNa3K(Al4Si4O16)
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ QuartzSiO2
Siⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Siⓘ ZirconZr(SiO4)
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
Kⓘ NephelineNa3K(Al4Si4O16)
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
ZrZirconium
Zrⓘ ZirconZr(SiO4)

Other Regions, Features and Areas containing this locality

Africa

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

Blanford, W. T. (1870). Observations on the Geology and Zoology of Abyssinia: Made During the Progress of the British Expedition to that Country in 1867-68. Macmillan and Company.
Prior, G. T. (1899). Riebeckite in trachytic rocks from Abyssinia. Mineralogical magazine and journal of the Mineralogical Society, 12(55), 92-95. doi.org/10.1180/minmag.1899.012.55.04
Prior, G. T. (1900). Ægirine and Riebeckite Anorthoclase Rocks Related to the “Grorudite-Tinguaite” series, from the neighbourhood of Adowa and Axum, Abyssinia. Mineralogical Magazine and Journal of the Mineralogical Society, 12(57), 255-273. doi.org/10.1180/minmag.1900.012.57.06
Merla, G., & Minucci, E. (1938). Missione geologica nel Tigrai: Rome, Reale Accademia d'Italia. Centro Studi per l'Africa Orientale Italiana, Roma, 3.
Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll. of Addis Ababa Press, Addis Ababa.
Le Bas, M. J., & Mohr, P. A. (1968). Feldspathoidal rocks from the Cainozoic volcanic province of Ethiopia. Geologische Rundschau, 58(1), 273-280. doi.org/10.1007/BF01820608
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Fazzuoli, M., Sagri, M., & Tacconi, P. (1979). Geological map of Ethiopia and Somalia (1973). 1:2000000 and comments with a map of major landforms. Consiglio Nazionale delle Ricerche Italy. Centro Stampa, Firenze.
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 73.
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