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Wonchi Volcano, Oromia Region, Ethiopiai
Regional Level Types
Wonchi VolcanoVolcano
Oromia RegionRegion
EthiopiaCountry

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Latitude & Longitude (WGS84):
8° 38' North , 37° 56' East
Latitude & Longitude (decimal):
8.63333,37.93333
GRN:
N06E27
Type:
Volcano
Köppen climate type:
Cwb : Subtropical highland climate or temperate oceanic climate with dry winters
Nearest Settlements:
PlacePopulationDistance
Waliso38,394 (2014)11.6km
Tulu Bolo10,531 (2012)31.4km
Hāgere Hiywet43,920 (2012)40.0km
Ādīs ‘Alem9,859 (2012)67.8km
Gēdo7,499 (2012)68.1km
Mindat Locality ID:
406648
Long-form identifier:
mindat:1:2:406648:7
GUID (UUID V4):
0
Other/historical names associated with this locality:
Wanchi; Wenchi


The volcano is approximately 50 km in diameter and rises to 3,456 metres. It is formed mostly of fine-grained pyroclastic deposits and is very complex with numerous calderas and satellite craters.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


9 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
ⓘ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ 'Amphibole Supergroup'
Formula: AB2C5(T8O22)W2
ⓘ Arfvedsonite
Formula: NaNa2(Fe2+4Fe3+)Si8O22(OH)2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Edenite
Formula: NaCa2Mg5(Si7Al)O22(OH)2
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Riebeckite
Formula: ◻Na2(Fe2+3Fe3+2)Si8O22(OH)2
ⓘ Wilkinsonite
Formula: Na2Fe2+4Fe3+2(Si6O18)O2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘEdenite9.DE.15NaCa2Mg5(Si7Al)O22(OH)2
ⓘArfvedsonite9.DE.25NaNa2(Fe2+4Fe3+)Si8O22(OH)2
ⓘRiebeckite9.DE.25◻Na2(Fe2+3Fe3+2)Si8O22(OH)2
ⓘAenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
ⓘWilkinsonite9.DH.40Na2Fe2+4Fe3+2(Si6O18)O2
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5(T8O22)W2
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hⓘ ArfvedsoniteNaNa2(Fe42+Fe3+)Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Hⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Amphibole SupergroupAB2C5(T8O22)W2
Oⓘ ArfvedsoniteNaNa2(Fe42+Fe3+)Si8O22(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Oⓘ WilkinsoniteNa2Fe42+Fe23+(Si6O18)O2
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ ArfvedsoniteNaNa2(Fe42+Fe3+)Si8O22(OH)2
Naⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Naⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Naⓘ WilkinsoniteNa2Fe42+Fe23+(Si6O18)O2
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Alⓘ MicroclineK(AlSi3O8)
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ ArfvedsoniteNaNa2(Fe42+Fe3+)Si8O22(OH)2
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
Siⓘ MicroclineK(AlSi3O8)
Siⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Siⓘ WilkinsoniteNa2Fe42+Fe23+(Si6O18)O2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ EdeniteNaCa2Mg5(Si7Al)O22(OH)2
TiTitanium
Tiⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feⓘ ArfvedsoniteNaNa2(Fe42+Fe3+)Si8O22(OH)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
Feⓘ WilkinsoniteNa2Fe42+Fe23+(Si6O18)O2

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

Gaeta, Mario, Mottana, Annibale (1991) Phase relations of aenigmatite minerals in a syenitic ejectum, wonchi volcano, Ethiopia. Mineralogical Magazine, 55 (381) 529-534 doi:10.1180/minmag.1991.055.381.05
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.80
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