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Ivuna meteorite, Mbeya Region, Tanzania

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Latitude & Longitude (WGS84): 8° 25' 0'' South , 32° 25' 59'' East
Latitude & Longitude (decimal): -8.41667,32.43333
Non-native locality type:Meteorite
Meteorite Class:CI1 chondrite meteorite
Meteoritical Society Class: CI1
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Aw : Tropical savanna, wet

The Ivuna (CI1) meteorite fell on 16 Dec 1938. A single stone of 704.5 g was recovered of the 2 or 3 which fell. Ivuna is the prototype for the CI (Ivuna-like) Carbonaceous Chondrites. It is one of 5 known CI falls and 4 CI finds. At the present time all 9 CI chondrites are classified as having petrologic type CI1.

Like all carbonaceous chondrite, Ivuna and other CI carbonaceous chondrites have nearly solar Mg/Si ratios and similar oxygen isotope ratios. In addition, Ivuna and other members of the CI chemical group are distinguished by the absence of chondrules and a high degree of hydration.

Because of Ivuna’s very small mass, other more massive CI1 falls (such as Orgueil) are more frequently utilized for research.

Mineral List

18 valid minerals.

Meteorite/Rock Types Recorded

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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.


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Brian Mason (1962). Meteorites. John Wiley and Sons, Inc.: New York & London. 274 pages.
Wood, John A. (1977). Mineralogic and petrologic study of the low-temperature minerals in carbonaceous chondrites. Final Report, Smithsonian Astrophysical Observatory, Cambridge, Massachusetts.
Kerridge, J. F., J. D. MacDougall & K. Marti (1979). Clues to the origin of sulfide minerals in CI chondrites. Earth and Planetary Science Letters: 43(3): 359-367.
Brearley, Adrian J. (1992). Mineralogy of fine-grained matrix in the Ivuna CI Carbonaceous Chondrite. Lunar and Planetary Science Conference 1992.
Endress, M. & A. Bischoff (1993). Mineralogy, Degree of Brecciation, and Aqueous Alteration of CI Chondrites Orgueil, Ivuna, and Alais. Meteoritics: 28(3): 345-346.
Brearley, A. J. & Jones, R. H. (1998). Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
Grady, Monica M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Garvie, Laurance A. J. & Peter R. Buseck (2007). Prebiotic carbon in clays from Orguril and Ivuna (CI). Meteoritics & Planetary Science: 42(12): 2111-2117.
Frank, D., M. Zolensky, J. Martinez, T. Mikouchi, K. Ohsumi, K. Hagiya, W. Satake, L. Le, D. Ross & A. Peslier (2011). A CAI in the Ivuna CI1 Chondrite. 42nd Lunar and Planetary Science Conference. LPI Contribution #1608, p. 2785.

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