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Rumpi Hills, Southwest Region, Camerooni
Regional Level Types
Rumpi HillsComplex
Southwest RegionRegion
CameroonCountry

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Latitude & Longitude (WGS84):
4° 50' North , 9° 7' East
Latitude & Longitude (decimal):
4.83333,9.11667
GeoHash:
G#: s0y7rrys1
GRN:
N04E07
Type:
Complex
Köppen climate type:
Am : Tropical monsoon climate
Mindat Locality ID:
406244
Long-form identifier:
mindat:1:2:406244:1
GUID (UUID V4):
0


Located 80 km north of Mount Cameroon and extend over some 1500 km² and culminate in Mount Rata at 1768 m. Much of the area is occupied by Precambrian metamorphic and intrusive rocks that are cut by a number of Cainozoic intusive complexes and overlain extensively by volcanics of similar age.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


10 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
Formula: NaFe3+Si2O6
ⓘ Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Anorthoclase
Formula: (Na,K)AlSi3O8
ⓘ 'Alkali Feldspar'
ⓘ 'Alkali pyroxene'
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘ 'Clinopyroxene Subgroup'
ⓘ Fayalite
Formula: Fe2+2SiO4
ⓘ 'Fayalite-Forsterite Series'
ⓘ Kaersutite
Formula: NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
ⓘ Sanidine
Formula: K(AlSi3O8)
ⓘ Sodalite
Formula: Na4(Si3Al3)O12Cl
ⓘ Tetraferriannite
Formula: KFe2+3(Si3Fe3+)O10(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘFayalite9.AC.05Fe2+2SiO4
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘKaersutite9.DE.15NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘAenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
ⓘTetraferriannite9.EC.20KFe2+3(Si3Fe3+)O10(OH)2
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
ⓘSanidine9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Anorthoclase9.FA.35(Na,K)AlSi3O8
ⓘSodalite9.FB.10Na4(Si3Al3)O12Cl
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Alkali pyroxene'-

List of minerals for each chemical element

HHydrogen
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ TetraferrianniteKFe32+(Si3Fe3+)O10(OH)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ FayaliteFe22+SiO4
Oⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ SanidineK(AlSi3O8)
Oⓘ SodaliteNa4(Si3Al3)O12Cl
Oⓘ TetraferrianniteKFe32+(Si3Fe3+)O10(OH)2
Oⓘ Fayalite-Forsterite Series
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ SodaliteNa4(Si3Al3)O12Cl
MgMagnesium
Mgⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Alⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ SanidineK(AlSi3O8)
Alⓘ SodaliteNa4(Si3Al3)O12Cl
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ FayaliteFe22+SiO4
Siⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ SanidineK(AlSi3O8)
Siⓘ SodaliteNa4(Si3Al3)O12Cl
Siⓘ TetraferrianniteKFe32+(Si3Fe3+)O10(OH)2
Siⓘ Fayalite-Forsterite Series
ClChlorine
Clⓘ SodaliteNa4(Si3Al3)O12Cl
KPotassium
Kⓘ Albite var. Anorthoclase(Na,K)AlSi3O8
Kⓘ NephelineNa3K(Al4Si4O16)
Kⓘ SanidineK(AlSi3O8)
Kⓘ TetraferrianniteKFe32+(Si3Fe3+)O10(OH)2
CaCalcium
Caⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
TiTitanium
Tiⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Tiⓘ KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Feⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feⓘ FayaliteFe22+SiO4
Feⓘ TetraferrianniteKFe32+(Si3Fe3+)O10(OH)2
Feⓘ Fayalite-Forsterite Series

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

Jérémine, E. (1943). Contribution à l'étude pétrographique du Cameroun Occidental. In: Memoires du Museum National d'Histoire Naturelle. Paris, NS, 17, 273-320.
Déruelle, B., Moreau, C., Nkoumbou, C., Kambou, R., Lissom, J., Njonfang, E., ... & Nono, A. (1991). The Cameroon line: a review. In Magmatism in extensional structural settings (pp. 274-327). Springer, Berlin, Heidelberg. doi.org/10.1007/978-3-642-73966-8_12
Farges, François, Brown, Gordon E., Jr.,, Velde, Danielle (1994) Structural environment of Zr in two inosilicates from Cameroon: Mineralogical and geochemical implications. American Mineralogist, 79 (9-10) 838-847
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.37
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