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Rumphi Igneous Complex, Rumphi, Northern Region, Malawii
Regional Level Types
Rumphi Igneous ComplexVolcanic Complex
RumphiDistrict
Northern RegionRegion
MalawiCountry

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Latitude & Longitude (WGS84):
10° 59' South , 34° 4' East
Latitude & Longitude (decimal):
-10.98333,34.06667
GeoHash:
G#: ky01x0w96
GRN:
S08E24
Type:
Volcanic Complex
Köppen climate type:
Aw : Tropical savanna, wet
Mindat Locality ID:
407360
Long-form identifier:
mindat:1:2:407360:7
GUID (UUID V4):
0


Large igneous complex of approx. 60 x 15 km which includes granite, syenite, diorite and nepheline syenite (Hopkins 1973; Kemp 1975), of which the nepheline syenites form a discrete body known as Mphompha Intrusion.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

7 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
ⓘ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Feldspar Group'
ⓘ 'Feldspar Group var. Perthite'
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ⓘ Sodalite
Formula: Na4(Si3Al3)O12Cl

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
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘRiebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
ⓘSodalite9.FB.10Na4(Si3Al3)O12Cl
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Feldspar Group'-
ⓘ'var. Perthite'-
ⓘ'Pyroxene Group'-ADSi2O6

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Oⓘ SodaliteNa4(Si3Al3)O12Cl
Oⓘ Pyroxene GroupADSi2O6
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
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ⓘ AlbiteNa(AlSi3O8)
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Naⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Naⓘ SodaliteNa4(Si3Al3)O12Cl
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
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ MicroclineK(AlSi3O8)
Alⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alⓘ SodaliteNa4(Si3Al3)O12Cl
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ MicroclineK(AlSi3O8)
Siⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siⓘ Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Siⓘ SodaliteNa4(Si3Al3)O12Cl
Siⓘ Pyroxene GroupADSi2O6
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clⓘ SodaliteNa4(Si3Al3)O12Cl
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ⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
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ⓘ Arfvedsonite[Na][Na2][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

Localities in this Region

Malawi

Other Regions, Features and Areas containing this locality

AfricaContinent
African 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

Hopkins, D.A.S. 1973. The geology of the Rumphi-Nkhata Bay area. Bulletin, Geological Survey of Malawi, 38/39.
Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Kemp, J. (1975). The geology of the Uzumara area. Bulletin, Geological Survey of Malawi, 41.
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.160
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