Nkumbwa Hill Carbonatite (Nkombwa Hill Carbonatite), Isoka, Isoka District, Muchinga Province, Zambia (original) (raw)

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 District District
Muchinga Province Province
Zambia Country

Latitude & Longitude (WGS84):

10° 10' South , 32° 52' East

Latitude & Longitude (decimal):

Nearest Settlements:

Place Population Distance
Isoka 13,122 (2016) 25.5km
Chitipa 8,824 (2011) 67.9km

Long-form identifier:

mindat:1:2:31173:2

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.

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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!

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Alphabetical List Tree Diagram

Entries shown in red are rocks recorded for this region.

Detailed Mineral List:

ⓘ AnkeriteFormula: Ca(Fe2+,Mg)(CO3)2References: 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
ⓘ 'Apatite'Formula: Ca5(PO4)3(Cl/F/OH)References: 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
ⓘ BaryteFormula: BaSO4References: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ Bastnäsite-(Ce)Formula: Ce(CO3)FReferences: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ CalciteFormula: CaCO3References: 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
ⓘ Daqingshanite-(Ce)Formula: (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2xReferences: Appleton J.D., Bland D.J., Nancarrow P.H., Styles M.Z., Mambwe S.H., Zambezi P. (1992) The occurrence of daqinshanite-(Ce) in the Nkombwa Hill carbonatite, Zambia. - Mineralogical Magazine, 56, p. 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, 493-496
ⓘ DolomiteFormula: CaMg(CO3)2References: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ FluoriteFormula: CaF2References: 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
ⓘ FluorstrophiteFormula: SrCaSr3(PO4)3F
ⓘ IlmeniteFormula: Fe2+TiO3References: 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
ⓘ Isokite (TL)Formula: CaMg(PO4)FType Locality: References: 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
ⓘ MagnesiteFormula: MgCO3References: 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
ⓘ Monazite-(Ce)Formula: Ce(PO4)References: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ PhlogopiteFormula: KMg3(AlSi3O10)(OH)2References: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ PyriteFormula: FeS2References: 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
ⓘ 'Pyrochlore Group'Formula: A2Nb2(O,OH)6ZReferences: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ QuartzFormula: SiO2References: 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
ⓘ SellaiteFormula: MgF2References: Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Mineralogy and Petrology 59, 239-250.
ⓘ SideriteFormula: FeCO3References: 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
ⓘ StrontianiteFormula: SrCO3References: 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

List of minerals for each chemical element

H Hydrogen
H ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
H ⓘ Phlogopite KMg3(AlSi3O10)(OH)2
H ⓘ Pyrochlore Group A2Nb2(O,OH)6Z
H ⓘ Apatite Ca5(PO4)3(Cl/F/OH)
C Carbon
C ⓘ Ankerite Ca(Fe2+,Mg)(CO3)2
C ⓘ Bastnäsite-(Ce) Ce(CO3)F
C ⓘ Calcite CaCO3
C ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
C ⓘ Dolomite CaMg(CO3)2
C ⓘ Magnesite MgCO3
C ⓘ Siderite FeCO3
C ⓘ Strontianite SrCO3
O Oxygen
O ⓘ Ankerite Ca(Fe2+,Mg)(CO3)2
O ⓘ Baryte BaSO4
O ⓘ Bastnäsite-(Ce) Ce(CO3)F
O ⓘ Calcite CaCO3
O ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
O ⓘ Dolomite CaMg(CO3)2
O ⓘ Ilmenite Fe2+TiO3
O ⓘ Isokite CaMg(PO4)F
O ⓘ Magnesite MgCO3
O ⓘ Monazite-(Ce) Ce(PO4)
O ⓘ Phlogopite KMg3(AlSi3O10)(OH)2
O ⓘ Pyrochlore Group A2Nb2(O,OH)6Z
O ⓘ Quartz SiO2
O ⓘ Siderite FeCO3
O ⓘ Fluorstrophite SrCaSr3(PO4)3F
O ⓘ Strontianite SrCO3
O ⓘ Apatite Ca5(PO4)3(Cl/F/OH)
F Fluorine
F ⓘ Bastnäsite-(Ce) Ce(CO3)F
F ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
F ⓘ Fluorite CaF2
F ⓘ Isokite CaMg(PO4)F
F ⓘ Sellaite MgF2
F ⓘ Fluorstrophite SrCaSr3(PO4)3F
F ⓘ Apatite Ca5(PO4)3(Cl/F/OH)
Mg Magnesium
Mg ⓘ Ankerite Ca(Fe2+,Mg)(CO3)2
Mg ⓘ Dolomite CaMg(CO3)2
Mg ⓘ Isokite CaMg(PO4)F
Mg ⓘ Magnesite MgCO3
Mg ⓘ Phlogopite KMg3(AlSi3O10)(OH)2
Mg ⓘ Sellaite MgF2
Al Aluminium
Al ⓘ Phlogopite KMg3(AlSi3O10)(OH)2
Si Silicon
Si ⓘ Phlogopite KMg3(AlSi3O10)(OH)2
Si ⓘ Quartz SiO2
P Phosphorus
P ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
P ⓘ Isokite CaMg(PO4)F
P ⓘ Monazite-(Ce) Ce(PO4)
P ⓘ Fluorstrophite SrCaSr3(PO4)3F
P ⓘ Apatite Ca5(PO4)3(Cl/F/OH)
S Sulfur
S ⓘ Baryte BaSO4
S ⓘ Pyrite FeS2
Cl Chlorine
Cl ⓘ Apatite Ca5(PO4)3(Cl/F/OH)
K Potassium
K ⓘ Phlogopite KMg3(AlSi3O10)(OH)2
Ca Calcium
Ca ⓘ Ankerite Ca(Fe2+,Mg)(CO3)2
Ca ⓘ Calcite CaCO3
Ca ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Ca ⓘ Dolomite CaMg(CO3)2
Ca ⓘ Fluorite CaF2
Ca ⓘ Isokite CaMg(PO4)F
Ca ⓘ Fluorstrophite SrCaSr3(PO4)3F
Ca ⓘ Apatite Ca5(PO4)3(Cl/F/OH)
Ti Titanium
Ti ⓘ Ilmenite Fe2+TiO3
Fe Iron
Fe ⓘ Ankerite Ca(Fe2+,Mg)(CO3)2
Fe ⓘ Ilmenite Fe2+TiO3
Fe ⓘ Pyrite FeS2
Fe ⓘ Siderite FeCO3
Sr Strontium
Sr ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Sr ⓘ Fluorstrophite SrCaSr3(PO4)3F
Sr ⓘ Strontianite SrCO3
Nb Niobium
Nb ⓘ Pyrochlore Group A2Nb2(O,OH)6Z
Ba Barium
Ba ⓘ Baryte BaSO4
Ba ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
La Lanthanum
La ⓘ Daqingshanite-(Ce) (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
Ce Cerium
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 Time Rocks, Minerals and Events
Precambrian
Proterozoic
Neoproterozoic
Cryogenian

Other Regions, Features and Areas containing this locality

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References

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.

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.