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Wollega-Ilubaror Volcanic Field, West Welega Zone, Oromia Region, Ethiopiai
Regional Level Types
Wollega-Ilubaror Volcanic FieldVolcanic Field
West Welega ZoneZone
Oromia RegionRegion
EthiopiaCountry

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Latitude & Longitude (WGS84):
9° North , 35° East
Latitude & Longitude (decimal):
9.00000,35.00000
GeoHash:
G#: sc8ghqqhz
GRN:
N06E25
Type:
Volcanic Field
Kรถppen climate type:
Aw : Tropical savanna, wet
Mindat Locality ID:
406643
Long-form identifier:
mindat:1:2:406643:2
GUID (UUID V4):
0


Tertiary volcanic rocks cover more than 1/3 of the Wollega-Ilubabor area. Most of the volcanic rocks are basaltic but there are some occurrences of alkaline rocks.

Approx coords range: 8ยบ00' - 10ยบ00'N; 34ยบ - 36ยบ30'E.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

4 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

โ“˜ Aegirine
Formula: NaFe3+Si2O6
โ“˜ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
โ“˜ 'Feldspar Group'
โ“˜ 'K Feldspar'
โ“˜ Nepheline
Formula: Na3K(Al4Si4O16)
โ“˜ Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
โ“˜Aegirine9.DA.25NaFe3+Si2O6
โ“˜Riebeckite9.DE.25โ—ป[Na2][Fe2+3Fe3+2]Si8O22(OH)2
โ“˜Aenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
โ“˜Nepheline9.FA.05Na3K(Al4Si4O16)
Unclassified
โ“˜'Feldspar Group'-
โ“˜'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hโ“˜ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
OOxygen
Oโ“˜ AegirineNaFe3+Si2O6
Oโ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oโ“˜ NephelineNa3K(Al4Si4O16)
Oโ“˜ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
NaSodium
Naโ“˜ AegirineNaFe3+Si2O6
Naโ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naโ“˜ NephelineNa3K(Al4Si4O16)
Naโ“˜ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
AlAluminium
Alโ“˜ NephelineNa3K(Al4Si4O16)
SiSilicon
Siโ“˜ AegirineNaFe3+Si2O6
Siโ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siโ“˜ NephelineNa3K(Al4Si4O16)
Siโ“˜ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
KPotassium
Kโ“˜ NephelineNa3K(Al4Si4O16)
TiTitanium
Tiโ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
FeIron
Feโ“˜ AegirineNaFe3+Si2O6
Feโ“˜ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feโ“˜ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2

Geochronology

Mineralization age: Miocene : 10.5 ยฑ 2.1 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
 Cenozoic
  Neogene
   Miocene
โ“˜ Trachyte10.5 ยฑ 2.1 Ma

Localities in this Region

Ethiopia

Other Regions, Features and Areas containing this locality

AfricaContinent
African PlateTectonic Plate

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

Mohr, P. A. (1962). The geology of Ethiopia: Univ. Coll.
Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Canuti, P., Fazzuoli, M., ... & Tacconi, P. (1979). A geological map of Ethiopia and Somalia (1973) 1: 2.000. 000 and comment. University of Florence, Italy.
Berhe, S. M., Desta, B., Nicoletti, M., & Teferra, M. (1987). Geology, geochronology and geodynamic implications of the Cenozoic magmatic province in W and SE Ethiopia. Journal of the Geological Society, 144(2), 213-226. doi.org/10.1144/gsjgs.144.2.0213
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.79
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