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

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PhotosMapsSearch
08529920015777223384503.jpg
border marking, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
08929410015306975036436.jpg
flank phonolite cones, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
08101770014950471728072.jpg
carbonatite dyke, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
08529920015777223384503.jpg
border marking, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
02603880014946415924641.jpg
flank phonolite cones, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
07830250014946415925822.jpg
carbonatite dyke, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
08529920015777223384503.jpg
border marking, Shombole volcano

Shompole Volcano, Kajiado County, Kenya
02603880014946415924641.jpg
flank phonolite cones, 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
Locality type:
Volcano
KΓΆppen climate type:
Aw : Tropical savanna, wet
Nearest Settlements:
PlacePopulationDistance
Magadi14,529 (2013)33.3km
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:

β“˜ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ 'Alkali Feldspar'
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Peterson, T.D. (1989) Peralkaline Nephelinites. I. Comparative petrology of Shombole and Oldoinyo L'engai, East Africa. Contributions to Mineralogy and Petrology Vol.101, 458-478.
trans.png
Melanite

Shompole Volcano, Kajiado County, Kenya
β“˜ Andradite var. Melanite
Formula: Ca3(Fe3+,Ti)2(SiO4)3
Reference: Peterson, T.D. (1989) Peralkaline Nephelinites. I. Comparative petrology of Shombole and Oldoinyo L'engai, East Africa. Contributions to Mineralogy and Petrology Vol.101, 458-478.
β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Diopside
Formula: CaMgSi2O6
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Eudialyte
Formula: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Reference: Peterson, T.D. (1989) Peralkaline Nephelinites. I. Comparative petrology of Shombole and Oldoinyo L'engai, East Africa. Contributions to Mineralogy and Petrology Vol.101, 458-478.
β“˜ Hedenbergite
Formula: CaFe2+Si2O6
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Nepheline
Formula: Na3K(Al4Si4O16)
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346. Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Perovskite
Formula: CaTiO3
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ 'Pyroxene Group'
Formula: ADSi2O6
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ 'Rhombohedral Carbonate'
Formula: (Ca/Mg/Fe/Mn etc)CO3
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Schorlomite
Formula: Ca3Ti2(SiO4)(Fe3+O4)2
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Sodalite
Formula: Na4(Si3Al3)O12Cl
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ Titanite
Formula: CaTi(SiO4)O
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346. Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
β“˜ 'Zeolite Group'
Reference: Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61. 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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Perovskite4.CC.30CaTiO3
Group 9 - Silicates
β“˜Aegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
β“˜Analcime9.GB.05Na(AlSi2O6) Β· H2O
β“˜Andradite9.AD.25Ca3Fe3+2(SiO4)3
β“˜var. Melanite9.AD.25Ca3(Fe3+,Ti)2(SiO4)3
β“˜Diopside9.DA.15CaMgSi2O6
β“˜Eudialyte9.CO.10Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
β“˜Hedenbergite9.DA.15CaFe2+Si2O6
β“˜Nepheline9.FA.05Na3K(Al4Si4O16)
β“˜Schorlomite9.AD.25Ca3Ti2(SiO4)(Fe3+O4)2
β“˜Sodalite9.FB.10Na4(Si3Al3)O12Cl
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜'Zeolite Group'9.G0.
Unclassified Minerals, Rocks, etc.
β“˜'Alkali Feldspar'-
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)
β“˜'Pyroxene Group'-ADSi2O6
β“˜'Rhombohedral Carbonate'-(Ca/Mg/Fe/Mn etc)CO3

List of minerals for each chemical element

HHydrogen
Hβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Hβ“˜ AnalcimeNa(AlSi2O6) · H2O
CCarbon
Cβ“˜ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
OOxygen
Oβ“˜ Andradite var. MelaniteCa3(Fe3+,Ti)2(SiO4)3
Oβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Oβ“˜ AndraditeCa3Fe23+(SiO4)3
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ HedenbergiteCaFe2+Si2O6
Oβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oβ“˜ NephelineNa3K(Al4Si4O16)
Oβ“˜ PerovskiteCaTiO3
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Oβ“˜ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
Oβ“˜ AnalcimeNa(AlSi2O6) · H2O
Oβ“˜ SodaliteNa4(Si3Al3)O12Cl
Oβ“˜ Pyroxene GroupADSi2O6
FFluorine
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Naβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naβ“˜ NephelineNa3K(Al4Si4O16)
Naβ“˜ AnalcimeNa(AlSi2O6) · H2O
Naβ“˜ SodaliteNa4(Si3Al3)O12Cl
MgMagnesium
Mgβ“˜ DiopsideCaMgSi2O6
Mgβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgβ“˜ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
AlAluminium
Alβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alβ“˜ NephelineNa3K(Al4Si4O16)
Alβ“˜ AnalcimeNa(AlSi2O6) · H2O
Alβ“˜ SodaliteNa4(Si3Al3)O12Cl
SiSilicon
Siβ“˜ Andradite var. MelaniteCa3(Fe3+,Ti)2(SiO4)3
Siβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Siβ“˜ AndraditeCa3Fe23+(SiO4)3
Siβ“˜ DiopsideCaMgSi2O6
Siβ“˜ HedenbergiteCaFe2+Si2O6
Siβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siβ“˜ NephelineNa3K(Al4Si4O16)
Siβ“˜ TitaniteCaTi(SiO4)O
Siβ“˜ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Siβ“˜ AnalcimeNa(AlSi2O6) · H2O
Siβ“˜ SodaliteNa4(Si3Al3)O12Cl
Siβ“˜ Pyroxene GroupADSi2O6
PPhosphorus
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Clβ“˜ SodaliteNa4(Si3Al3)O12Cl
KPotassium
Kβ“˜ NephelineNa3K(Al4Si4O16)
CaCalcium
Caβ“˜ Andradite var. MelaniteCa3(Fe3+,Ti)2(SiO4)3
Caβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Caβ“˜ AndraditeCa3Fe23+(SiO4)3
Caβ“˜ DiopsideCaMgSi2O6
Caβ“˜ HedenbergiteCaFe2+Si2O6
Caβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caβ“˜ PerovskiteCaTiO3
Caβ“˜ TitaniteCaTi(SiO4)O
Caβ“˜ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Caβ“˜ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
TiTitanium
Tiβ“˜ Andradite var. MelaniteCa3(Fe3+,Ti)2(SiO4)3
Tiβ“˜ PerovskiteCaTiO3
Tiβ“˜ TitaniteCaTi(SiO4)O
Tiβ“˜ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
MnManganese
Mnβ“˜ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
FeIron
Feβ“˜ Andradite var. MelaniteCa3(Fe3+,Ti)2(SiO4)3
Feβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Feβ“˜ AndraditeCa3Fe23+(SiO4)3
Feβ“˜ HedenbergiteCaFe2+Si2O6
Feβ“˜ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feβ“˜ SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
ZrZirconium
Zrβ“˜ EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Geochronology

Mineralization age: Pleistocene : 2.00 Β± 0.05 Ma to 1.96 Β± 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
β“˜ Nephelinite (youngest age)1.96 Β± 0.07 Ma
β“˜ Nephelinite (oldest age)2.00 Β± 0.05 Ma

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Peterson, T.D. (1989) Peralkaline Nephelinites. I. Comparative petrology of Shombole and Oldoinyo L'engai, East Africa. Contributions to Mineralogy and Petrology Vol.101, 458-478.
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, T.D. 1989. Peralkaline nephelinites. II. Low pressure-fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology, 102, 336-346.
Baker, B. H. (1963). Geology of the area south of Magadi. Geological Survey of Kenya Report, 61.
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
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 136.

Other Regions, Features and Areas containing this locality

Africa
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.
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