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Nkumbwa Hill Carbonatite (Nkombwa Hill Carbonatite), Isoka, Isoka District, Muchinga Province, Zambiai
Regional Level Types
Nkumbwa Hill Carbonatite (Nkombwa Hill Carbonatite)- not defined -
Isoka- not defined -
Isoka DistrictDistrict
Muchinga ProvinceProvince
ZambiaCountry

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Latitude & Longitude (WGS84):
10° 10' South , 32° 52' East
Latitude & Longitude (decimal):
-10.16667,32.86667
GeoHash:
G#: kwpq5vhyb
GRN:
S07E23
Köppen climate type:
Cwa : Monsoon-influenced humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Isoka13,122 (2016)25.5km
Chitipa8,824 (2011)67.9km
Mindat Locality ID:
31173
Long-form identifier:
mindat:1:2:31173:2
GUID (UUID V4):
2063b539-c638-432d-874c-296026bcfdcf


Carbonatite plug, consisting of fairly homogeneous white, medium- to fine-grained ankeritic dolomite carbonatite (rauhaugite) which is cut by sills and dykes, 1 to 2 m wide, of medium- to coarse-grained ferrocarbonatite. The west-central part of the plug is intensely silicified. The Nkombwa Hill carbonatite is deficient in calcium, as evidenced by the absence of calcite carbonatite, but has high magnesium and fluorine contents, reflected in the abundance of dolomite and phlogopite, and the presence of fluorite, apatite, sellaite, and isokite.

Located about 15 miles east of Isoka.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


18 valid minerals. 1 (TL) - type locality of 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:

ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Baryte
Formula: BaSO4
ⓘ Bastnäsite-(Ce)
Formula: Ce(CO3)F
ⓘ Calcite
Formula: CaCO3
ⓘ Daqingshanite-(Ce)
Formula: (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Fluorite
Formula: CaF2
ⓘ Fluorstrophite
Formula: SrCaSr3(PO4)3F
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Isokite (TL)
Formula: CaMg(PO4)F
Type Locality:
ⓘ Magnesite
Formula: MgCO3
ⓘ Monazite-(Ce)
Formula: Ce(PO4)
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ 'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
ⓘ Quartz
Formula: SiO2
ⓘ Sellaite
Formula: MgF2
ⓘ Siderite
Formula: FeCO3
ⓘ Strontianite
Formula: SrCO3

Gallery:

(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2xⓘ Daqingshanite-(Ce)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 3 - Halides
ⓘSellaite3.AB.15MgF2
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘ'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘMagnesite5.AB.05MgCO3
ⓘ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
ⓘDaqingshanite-(Ce)5.BF.15(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
ⓘMonazite-(Ce)8.AD.50Ce(PO4)
ⓘIsokite (TL)8.BH.10CaMg(PO4)F
ⓘFluorstrophite8.BN.05SrCaSr3(PO4)3F
Group 9 - Silicates
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
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ⓘ CalciteCaCO3
Cⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Cⓘ DolomiteCaMg(CO3)2
Cⓘ MagnesiteMgCO3
Cⓘ SideriteFeCO3
Cⓘ StrontianiteSrCO3
OOxygen
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ BaryteBaSO4
Oⓘ Bastnäsite-(Ce)Ce(CO3)F
Oⓘ CalciteCaCO3
Oⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Oⓘ DolomiteCaMg(CO3)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ IsokiteCaMg(PO4)F
Oⓘ MagnesiteMgCO3
Oⓘ Monazite-(Ce)Ce(PO4)
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
Oⓘ QuartzSiO2
Oⓘ SideriteFeCO3
Oⓘ FluorstrophiteSrCaSr3(PO4)3F
Oⓘ StrontianiteSrCO3
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ Bastnäsite-(Ce)Ce(CO3)F
Fⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Fⓘ FluoriteCaF2
Fⓘ IsokiteCaMg(PO4)F
Fⓘ SellaiteMgF2
Fⓘ FluorstrophiteSrCaSr3(PO4)3F
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
MgMagnesium
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ IsokiteCaMg(PO4)F
Mgⓘ MagnesiteMgCO3
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ SellaiteMgF2
AlAluminium
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
PPhosphorus
Pⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Pⓘ IsokiteCaMg(PO4)F
Pⓘ Monazite-(Ce)Ce(PO4)
Pⓘ FluorstrophiteSrCaSr3(PO4)3F
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ BaryteBaSO4
Sⓘ PyriteFeS2
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ CalciteCaCO3
Caⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Caⓘ DolomiteCaMg(CO3)2
Caⓘ FluoriteCaF2
Caⓘ IsokiteCaMg(PO4)F
Caⓘ FluorstrophiteSrCaSr3(PO4)3F
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ IlmeniteFe2+TiO3
FeIron
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Feⓘ IlmeniteFe2+TiO3
Feⓘ PyriteFeS2
Feⓘ SideriteFeCO3
SrStrontium
Srⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Srⓘ FluorstrophiteSrCaSr3(PO4)3F
Srⓘ StrontianiteSrCO3
NbNiobium
Nbⓘ Pyrochlore GroupA2Nb2(O,OH)6Z
BaBarium
Baⓘ BaryteBaSO4
Baⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
LaLanthanum
Laⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
CeCerium
Ceⓘ Bastnäsite-(Ce)Ce(CO3)F
Ceⓘ Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Ceⓘ Monazite-(Ce)Ce(PO4)

Geochronology

Mineralization age: Neoproterozoic : 704 Ma to 654 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
Precambrian
 Proterozoic
  Neoproterozoic
   Cryogenian
ⓘ Carbonatite (youngest age)654 Ma
ⓘ Phlogopite (youngest age)654 Ma
ⓘ Carbonatite (oldest age)704 Ma
ⓘ Phlogopite (oldest age)704 Ma

Other Regions, Features and Areas containing this locality

Africa
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

(n.d.)
(n.d.)
(n.d.)
www.getamap.net (n.d.) http://www.getamap.net/maps/zambia/northern/_nkumbwa/
www.getamap.net (n.d.) http://www.getamap.net/maps/zambia/north-western/_nkumbwa/
Deans, T., McConnell, J. D. C., Pickup, R. (1955) Isokite, CaMgPO4F, a new mineral from Northern Rhodesia. Mineralogical Magazine and Journal of the Mineralogical Society, 30 (230) 681-690 doi:10.1180/minmag.1955.030.230.01
Appleton, J.D., Bland, D.J., Nancarrow, P.H., Styles, M.Z., Mambwe, S.H., Zambezi, P. (1992) The occurrence of daqingshanite-(Ce) in the Nkombwa Hill carbonatite, Zambia. Mineralogical Magazine, 56(384), 419-422.
Hughes, J.M., Yunxiang, N. (1994) A high-precision crystal structure refinement of daqingshanite-(Ce) from Nkombwa Hill carbonatite, Zambia. Mineralogical Magazine, 58(392), 493-496.
Zambezi, P., Voncken, J.H.L., Hale, M., Touret, J.L.R. (1997) Bastnäsite-(Ce) at the Nkombwa Hill carbonatite complex, Isoka District, northeast Zambia. Mineralogy and Petrology, 59(3-4), 239-250.
Berger, Vladimir I., Singer, Donald A., Orris, Greta J. (2009) Carbonatites of the World, Explored Deposits of Nb and REE—Database and Grade and Tonnage Models . Open-File Report 2009-1139. U.S. Geological Survey doi:10.3133/ofr20091139
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