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Rangwa complex, Homa Bay County, Kenyai
Regional Level Types
Rangwa complexComplex
Homa Bay CountyCounty
KenyaCountry

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Latitude & Longitude (WGS84):
0° South , 34° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~19km
GRN:
S01E24
Type:
Complex
Köppen climate type:
Am : Tropical monsoon climate
Mindat Locality ID:
209289
Long-form identifier:
mindat:1:2:209289:1
GUID (UUID V4):
0


Carbonatite and pyroclastic rocks in the exposed central vent of the eroded Gwasi nephelinite volcano. The vent pierces granitic basement and an early-formed ijolite-uncompahgrite complex. The fenites typically contain abundant pale sodic amphibole and aegirine.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Forsterite
Formula: Mg2SiO4
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ 'Melilite Group'
Formula: Ca2M(XSiO7)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Perovskite
Formula: CaTiO3
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2

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
ⓘForsterite9.AC.05Mg2SiO4
ⓘDiopside9.DA.15CaMgSi2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified
ⓘ'Melilite Group'-Ca2M(XSiO7)

List of minerals for each chemical element

HHydrogen
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ DiopsideCaMgSi2O6
Oⓘ ForsteriteMg2SiO4
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PerovskiteCaTiO3
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Melilite GroupCa2M(XSiO7)
NaSodium
Naⓘ AegirineNaFe3+Si2O6
MgMagnesium
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ ForsteriteMg2SiO4
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ DiopsideCaMgSi2O6
Siⓘ ForsteriteMg2SiO4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Melilite GroupCa2M(XSiO7)
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ DiopsideCaMgSi2O6
Caⓘ PerovskiteCaTiO3
Caⓘ Melilite GroupCa2M(XSiO7)
TiTitanium
Tiⓘ PerovskiteCaTiO3
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ MagnetiteFe2+Fe23+O4

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

Sutherland, Diana S. (1969) Sodic amphiboles and pyroxenes from fenites in East Africa. Contributions to Mineralogy and Petrology, 24 (2) 114-135 doi:10.1007/bf00376886
Nyamai, C.M., Haapala, I. (2000) A Comparison of the uncompahgrite and turjaite mineralogy (phlogopite, melilite, etc.) of the south Nyanza district, western Kenya, with similar rock complexes in Asia, Australia and America. China & East Asia 2000 Symposium.
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