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Shompole Volcano, Kajiado County, Kenyai
Regional Level Types
Shompole VolcanoVolcano
Kajiado CountyCounty
KenyaCountry

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PhotosMapsSearch
00618210017271978676048.jpg
flank phonolite cones, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
05322400017271978754667.jpg
view across normal fault, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
02808610017272288621942.jpg
border marking, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
00618210017271978676048.jpg
flank phonolite cones, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
05322400017271978754667.jpg
view across normal fault, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
02808610017272288621942.jpg
border marking, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
00618210017271978676048.jpg
flank phonolite cones, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
05322400017271978754667.jpg
view across normal fault, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
Latitude & Longitude (WGS84):
2° 7' 40'' South , 36° 5' 25'' East
Latitude & Longitude (decimal):
-2.12778,36.09028
GeoHash:
G#: kz9evk8hu
GRN:
S02E26
Type:
Volcano
Köppen climate type:
Aw : Tropical savanna, wet
Nearest Settlements:
PlacePopulationDistance
Magadi14,529 (2013)33.3km
Mindat Locality ID:
194513
Long-form identifier:
mindat:1:2:194513:6
GUID (UUID V4):
0
Name(s) in local language(s):
Shombole


Shompole is a strongly eroded, 2 myr-old nephelinite-phonolite-carbonatite volcano on the border between Kenya and Tanzania. It erupted onto the floor of the East African rift, south of present-day Lake Magadi, on the north shore of Lake Natron.

Currently, the only mineral specimen of note is of melanite garnet, but deep erosional valleys may penetrate the intrusive core in some areas and there is collecting potential for the intrepid.

Eudialyte has been observed in syenite xenoliths in young phonolites.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


12 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
ⓘ 'Alkali Feldspar'
ⓘ Analcime
Formula: Na(AlSi2O6) · H2O
ⓘ Andradite
Formula: Ca3Fe3+2(SiO4)3
ⓘ Andradite var. Melanite
Formula: Ca3Fe3+2(SiO4)3
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Eudialyte
Formula: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
ⓘ Hedenbergite
Formula: CaFe2+Si2O6
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
ⓘ Perovskite
Formula: CaTiO3
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ 'Rhombohedral Carbonate'
Formula: (Ca/Mg/Fe/Mn etc)CO3
ⓘ Schorlomite
Formula: Ca3Ti2(SiO4)(Fe3+O4)2
ⓘ Sodalite
Formula: Na4(Si3Al3)O12Cl
ⓘ Titanite
Formula: CaTi(SiO4)O
ⓘ 'Zeolite Group'

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘPerovskite4.CC.30CaTiO3
Group 9 - Silicates
ⓘAndradite9.AD.25Ca3Fe3+2(SiO4)3
ⓘSchorlomite9.AD.25Ca3Ti2(SiO4)(Fe3+O4)2
ⓘAndradite
var. Melanite		9.AD.25Ca3Fe3+2(SiO4)3
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘEudialyte9.CO.10Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
ⓘDiopside9.DA.15CaMgSi2O6
ⓘHedenbergite9.DA.15CaFe2+Si2O6
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
ⓘSodalite9.FB.10Na4(Si3Al3)O12Cl
ⓘ'Zeolite Group'9.G0.
ⓘAnalcime9.GB.05Na(AlSi2O6) · H2O
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)
ⓘ'Rhombohedral Carbonate'-(Ca/Mg/Fe/Mn etc)CO3

List of minerals for each chemical element

HHydrogen
Hⓘ AnalcimeNa(AlSi2O6) · H2O
Hⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
OOxygen
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ AnalcimeNa(AlSi2O6) · H2O
Oⓘ AndraditeCa3Fe23+(SiO4)3
Oⓘ DiopsideCaMgSi2O6
Oⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Oⓘ HedenbergiteCaFe2+Si2O6
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ PerovskiteCaTiO3
Oⓘ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Oⓘ SodaliteNa4(Si3Al3)O12Cl
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Oⓘ Pyroxene GroupADSi2O6
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Oⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
FFluorine
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ AnalcimeNa(AlSi2O6) · H2O
Naⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ SodaliteNa4(Si3Al3)O12Cl
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ AnalcimeNa(AlSi2O6) · H2O
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ SodaliteNa4(Si3Al3)O12Cl
SiSilicon
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ AnalcimeNa(AlSi2O6) · H2O
Siⓘ AndraditeCa3Fe23+(SiO4)3
Siⓘ DiopsideCaMgSi2O6
Siⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Siⓘ HedenbergiteCaFe2+Si2O6
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Siⓘ SodaliteNa4(Si3Al3)O12Cl
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Siⓘ Pyroxene GroupADSi2O6
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Clⓘ SodaliteNa4(Si3Al3)O12Cl
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ NephelineNa3K(Al4Si4O16)
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ AndraditeCa3Fe23+(SiO4)3
Caⓘ DiopsideCaMgSi2O6
Caⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Caⓘ HedenbergiteCaFe2+Si2O6
Caⓘ PerovskiteCaTiO3
Caⓘ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Caⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
TiTitanium
Tiⓘ PerovskiteCaTiO3
Tiⓘ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Tiⓘ TitaniteCaTi(SiO4)O
MnManganese
Mnⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
FeIron
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ AndraditeCa3Fe23+(SiO4)3
Feⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Feⓘ HedenbergiteCaFe2+Si2O6
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Feⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Feⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
ZrZirconium
Zrⓘ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Geochronology

Mineralization age: Pleistocene : 2.00 ± 0.05 Ma to 1.96 ± 0.07 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
  Quaternary
   Pleistocene
ⓘ Nephelinite (youngest age)1.96 ± 0.07 Ma
ⓘ Nephelinite (oldest age)2.00 ± 0.05 Ma

Other Regions, Features and Areas containing this locality

AfricaContinent
African Plate
Kenya
Somali 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

Baker, B. H. (1963) Geology of the Area South of Magadi. Report 61. Geological Survey of Kenya
Fairhead, J. D., Mitchell, J. G., & Williams, L. A. J. (1972). New K/Ar determinations on rift volcanics of S. Kenya and their bearing on age of rift faulting. Nature Physical Science, 238(83), 66-69. doi.org/10.1038/physci238066a0
Crossley, R. (1979). The Cenozoic stratigraphy and structure of the western part of the Rift Valley in southern Kenya. Journal of the Geological Society, 136(4), 393-405. doi.org/10.1144/gsjgs.136.4.0393
Peterson, Tony D. (1989) Peralkaline nephelinites. I. Comparative petrology of Shombole and Oldoinyo L'engai, East Africa. Contributions to Mineralogy and Petrology, 101 (4) 458-478 doi:10.1007/bf00372219
Peterson, Tony D. (1989) Peralkaline nephelinites. Contributions to Mineralogy and Petrology, 102 (3) 336-346 doi:10.1007/bf00373727
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.136
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