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Tundulu Ring Complex, Phalombe, Southern Region, Malawii
Regional Level Types
Tundulu Ring ComplexComplex
PhalombeDistrict
Southern RegionRegion
MalawiCountry

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Type:
Mindat Locality ID:
26431
Long-form identifier:
mindat:1:2:26431:9
GUID (UUID V4):
0
Other/historical names associated with this locality:
Tundulu Complex


A carbonatite complex in southeastern Malawi intruded during the late Jurassic to early Cretaceous over three episodes. During the first and second episodes, the major rock types were calcite carbonatites, ankerite carbonatites, and apatite carbonatites. Host rocks are nepheline syenite, sövite and ijoite.

NOTE on the mineral list: The three listed (Ca-)REE carbonates are all Ce-dominant, even though the abstract of Ngwenya (1994) erroneously suggests La-dominance (compare Table 3 in the paper).

The complex has been prospected for pyrochlore, rare earth minerals, apatite, barite and Fe and Mn ores (Garson 1962). Over 800000 tons of rock yielding over 20% P2O5 has been proved on Nathace Hill from the complex.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

28 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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
ⓘ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘ 'Alkali Feldspar'
ⓘ Analcime
Formula: Na(AlSi2O6) · H2O
ⓘ Anatase
Formula: TiO2
ⓘ Andradite
Formula: Ca3Fe3+2(SiO4)3
ⓘ Andradite var. Melanite
Formula: Ca3Fe3+2(SiO4)3
ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘ 'Barkevikite'
ⓘ Baryte
Formula: BaSO4
ⓘ 'Bastnäsite'
Formula: (Ce/Nd/Y/REE)(CO3)F
ⓘ Bastnäsite-(Ce)
Formula: Ce(CO3)F
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Calcite
Formula: CaCO3
ⓘ Cancrinite
Formula: (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
ⓘ Celestine
Formula: SrSO4
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ 'Fayalite-Forsterite Series'
ⓘ 'Feldspar Group'
ⓘ 'Florencite'
ⓘ Fluorite
Formula: CaF2
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ 'K Feldspar'
ⓘ Leucite
Formula: K(AlSi2O6)
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
ⓘ 'Melilite Group'
Formula: Ca2M(XSiO7)
ⓘ 'Monazite Group'
Formula: REE(PO4)
ⓘ Natrolite
Formula: Na2Al2Si3O10 · 2H2O
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
ⓘ Orthoclase
Formula: K(AlSi3O8)
ⓘ 'Parisite'
Formula: Ca(Ce/La/Nd/REE)2(CO3)3F2
ⓘ Parisite-(Ce)
Formula: CaCe2(CO3)3F2
ⓘ 'Pseudoleucite'
ⓘ 'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Quartz
Formula: SiO2
ⓘ 'Rhombohedral Carbonate'
Formula: (Ca/Mg/Fe/Mn etc)CO3
ⓘ Sanidine
Formula: K(AlSi3O8)
ⓘ Siderite
Formula: FeCO3
ⓘ 'Sodic amphibole'
ⓘ Strontianite
Formula: SrCO3
ⓘ 'Synchysite'
Formula: Ca(Ce/Nd/Y/REE)(CO3)2F
ⓘ Synchysite-(Ce)
Formula: CaCe(CO3)2F
ⓘ Titanite
Formula: CaTi(SiO4)O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘ'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘvar. Titanium-bearing Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
ⓘAnatase4.DD.05TiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘSiderite5.AB.05FeCO3
ⓘAnkerite5.AB.10Ca(Fe2+,Mg)(CO3)2
ⓘDolomite5.AB.10CaMg(CO3)2
ⓘStrontianite5.AB.15SrCO3
ⓘBastnäsite-(Ce)5.BD.20aCe(CO3)F
ⓘParisite-(Ce)5.BD.20bCaCe2(CO3)3F2
ⓘSynchysite-(Ce)5.BD.20cCaCe(CO3)2F
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
ⓘCelestine7.AD.35SrSO4
Group 9 - Silicates
ⓘAndradite9.AD.25Ca3Fe3+2(SiO4)3
ⓘvar. Melanite9.AD.25Ca3Fe3+2(SiO4)3
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
ⓘOrthoclase9.FA.30K(AlSi3O8)
ⓘSanidine9.FA.30K(AlSi3O8)
ⓘCancrinite9.FB.05(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
ⓘNatrolite9.GA.05Na2Al2Si3O10 · 2H2O
ⓘAnalcime9.GB.05Na(AlSi2O6) · H2O
ⓘLeucite9.GB.05K(AlSi2O6)
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Bastnäsite'-(Ce/Nd/Y/REE)(CO3)F
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Feldspar Group'-
ⓘ'Monazite Group'-REE(PO4)
ⓘ'Barkevikite'-
ⓘ'Parisite'-Ca(Ce/La/Nd/REE)2(CO3)3F2
ⓘ'Synchysite'-Ca(Ce/Nd/Y/REE)(CO3)2F
ⓘ'Fayalite-Forsterite Series'-
ⓘ'K Feldspar'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Florencite'-
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)
ⓘ'Melilite Group'-Ca2M(XSiO7)
ⓘ'Pseudoleucite'-
ⓘ'Sodic amphibole'-
ⓘ'Rhombohedral Carbonate'-(Ca/Mg/Fe/Mn etc)CO3

List of minerals for each chemical element

HHydrogen
Hⓘ AnalcimeNa(AlSi2O6) · H2O
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ⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Hⓘ GoethiteFe3+O(OH)
Hⓘ NatroliteNa2Al2Si3O10 · 2H2O
Hⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Cⓘ Bastnäsite-(Ce)Ce(CO3)F
Cⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Cⓘ CalciteCaCO3
Cⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Cⓘ DolomiteCaMg(CO3)2
Cⓘ Parisite-(Ce)CaCe2(CO3)3F2
Cⓘ SideriteFeCO3
Cⓘ StrontianiteSrCO3
Cⓘ Synchysite-(Ce)CaCe(CO3)2F
Cⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Cⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Cⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ AnalcimeNa(AlSi2O6) · H2O
Oⓘ AnataseTiO2
Oⓘ AndraditeCa3Fe23+(SiO4)3
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ BaryteBaSO4
Oⓘ Bastnäsite-(Ce)Ce(CO3)F
Oⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Oⓘ CelestineSrSO4
Oⓘ DolomiteCaMg(CO3)2
Oⓘ GoethiteFe3+O(OH)
Oⓘ IlmeniteFe2+TiO3
Oⓘ LeuciteK(AlSi2O6)
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ Monazite GroupREE(PO4)
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ NatroliteNa2Al2Si3O10 · 2H2O
Oⓘ OrthoclaseK(AlSi3O8)
Oⓘ Parisite-(Ce)CaCe2(CO3)3F2
Oⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Oⓘ QuartzSiO2
Oⓘ SanidineK(AlSi3O8)
Oⓘ SideriteFeCO3
Oⓘ StrontianiteSrCO3
Oⓘ Synchysite-(Ce)CaCe(CO3)2F
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Oⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Oⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Oⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Oⓘ Fayalite-Forsterite Series
Oⓘ Pyroxene GroupADSi2O6
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Oⓘ Melilite GroupCa2M(XSiO7)
Oⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
FFluorine
Fⓘ Bastnäsite-(Ce)Ce(CO3)F
Fⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ FluoriteCaF2
Fⓘ Parisite-(Ce)CaCe2(CO3)3F2
Fⓘ Synchysite-(Ce)CaCe(CO3)2F
Fⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Fⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ AnalcimeNa(AlSi2O6) · H2O
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ Fayalite-Forsterite Series
Mgⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ AnalcimeNa(AlSi2O6) · H2O
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Alⓘ LeuciteK(AlSi2O6)
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ NatroliteNa2Al2Si3O10 · 2H2O
Alⓘ OrthoclaseK(AlSi3O8)
Alⓘ SanidineK(AlSi3O8)
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ AnalcimeNa(AlSi2O6) · H2O
Siⓘ AndraditeCa3Fe23+(SiO4)3
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ⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Siⓘ LeuciteK(AlSi2O6)
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ NatroliteNa2Al2Si3O10 · 2H2O
Siⓘ OrthoclaseK(AlSi3O8)
Siⓘ QuartzSiO2
Siⓘ SanidineK(AlSi3O8)
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Siⓘ Fayalite-Forsterite Series
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Melilite GroupCa2M(XSiO7)
PPhosphorus
Pⓘ Monazite GroupREE(PO4)
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ BaryteBaSO4
Sⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Sⓘ CelestineSrSO4
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ LeuciteK(AlSi2O6)
Kⓘ NephelineNa3K(Al4Si4O16)
Kⓘ OrthoclaseK(AlSi3O8)
Kⓘ SanidineK(AlSi3O8)
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ AndraditeCa3Fe23+(SiO4)3
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ CalciteCaCO3
Caⓘ Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Caⓘ DolomiteCaMg(CO3)2
Caⓘ FluoriteCaF2
Caⓘ Parisite-(Ce)CaCe2(CO3)3F2
Caⓘ Synchysite-(Ce)CaCe(CO3)2F
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Caⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Caⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Caⓘ Melilite GroupCa2M(XSiO7)
Caⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
TiTitanium
Tiⓘ AnataseTiO2
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ TitaniteCaTi(SiO4)O
Tiⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
MnManganese
Mnⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ AndraditeCa3Fe23+(SiO4)3
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
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ⓘ GoethiteFe3+O(OH)
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ SideriteFeCO3
Feⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Feⓘ Andradite var. MelaniteCa3Fe23+(SiO4)3
Feⓘ Fayalite-Forsterite Series
Feⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
SrStrontium
Srⓘ CelestineSrSO4
Srⓘ StrontianiteSrCO3
YYttrium
Yⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Yⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
NbNiobium
Nbⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
BaBarium
Baⓘ BaryteBaSO4
LaLanthanum
Laⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
CeCerium
Ceⓘ Bastnäsite-(Ce)Ce(CO3)F
Ceⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Ceⓘ Parisite-(Ce)CaCe2(CO3)3F2
Ceⓘ Synchysite-(Ce)CaCe(CO3)2F
Ceⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Ceⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F
NdNeodymium
Ndⓘ Bastnäsite(Ce/Nd/Y/REE)(CO3)F
Ndⓘ ParisiteCa(Ce/La/Nd/REE)2(CO3)3F2
Ndⓘ SynchysiteCa(Ce/Nd/Y/REE)(CO3)2F

Geochronology

Mineralization age: Early/Lower Cretaceous : 140 Ma to 126 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
 Mesozoic
  Cretaceous
   Early/Lower Cretaceous
ⓘ Søvite (youngest age)126 Ma
ⓘ Biotite (youngest age)126 Ma
ⓘ Søvite (oldest age)140 Ma
ⓘ Biotite (oldest age)140 Ma

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Localities in this Region

Other Regions, Features and Areas that Intersect

AfricaContinent
African Plate
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

 
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