Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Nkumbwa Hill Carbonatite (Nkombwa Hill Carbonatite), Isoka, Isoka District, Muchinga Mts., Northern Province, Zambia

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 10° 10' South , 32° 52' East
Latitude & Longitude (decimal): -10.16667,32.86667
Köppen climate type:Cwa : Monsoon-influenced humid subtropical climate

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.

Mineral List

19 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram


Mineralization age: Cryogenian : 704 Ma to 654 Ma

Important note: This table is based only on rock and mineral ages recorded below 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
ⓘ Carbonatite (youngest age)654 Ma
ⓘ Phlogopite (youngest age)654 Ma
ⓘ Carbonatite (oldest age)704 Ma
ⓘ Phlogopite (oldest age)704 Ma

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Ectasian - Calymmian
1200 - 1600 Ma

ID: 3184920
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1200 - 1600 Ma)

Lithology: Orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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
Zambezi, P., Voncken, J.H.L., Hale, M., and Touret, J.L.R. (1997): Bastnäsite-(Ce) at the Nkombwa Hill carbonatite complex, Isoka District, northeast Zambia. Mineralogy and Petrology 59, 239-250.
Berger, V.I., Singer, D.A., and Orris, G.J. (2009): Carbonatites of the World. Explored Deposits of Nb and REE - Database and Grade and Tonnage Models. USGS Open-File Report 09-1139.

External Links

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: February 19, 2019 02:38:05 Page generated: February 7, 2018 21:10:32
Go to top of page