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Gujba
Basic information Name: Gujba
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 1984
Country: Nigeria
Mass:help 100 kg
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Bencubbinite
Meteoritical Bulletin:  MB 85  (2001)  Bencubbin-like
MetBase:  v. 7.1  (2006)  CBa
Recommended:  CBa    [explanation]

This is 1 of 6 approved meteorites classified as CBa.   [show all]
Search for other: Carbonaceous chondrites (type 3), CH-CB family, CB chondrites, Metal-rich meteorites, and Carbonaceous chondrites
Writeuphelp
Writeup from MB 85:

Gujba

Yobe, Nigeria

Fell 1984 April 3, 18:30 local time

Bencubbin-like meteorite

A conical meteorite fell in a corn field near the village of Bogga Dingare after a bright fireball was witnessed moving west to east and an explosion was heard. The local people hammered the meteorite into many pieces, and most of the material was dispersed. The original mass is unknown, although secondhand reports indicate that it had a volume of ~20 000 cm3, and thus a mass of ~100 kg. Material that almost certainly came from this fall has been sold in the last few years elsewhere in Nigeria, with claims that the specimens were new finds. A preliminary description of the meteorite appears in Islam and Ostaficzuk (1988). Description (L. Karwowski, USil, based on the original mass): contains metal nodules, 1.5–8 mm in diameter, and silicate nodules 1–15 mm in diameter with fan-like aggregates of pyroxene; 60% of nodules are metal. Description and classification (A. Rubin and G. Kallemeyn, UCLA, based on a 282 g fragment purchased in 2000 near the village of Gidan Wire in Kaduna state): consists of large metal nodules containing variable amounts of troilite, and cryptocrystalline silicate spheroids; silicates include pyroxene (Fs1–2Wo1–3) and rare olivine (Fa3); siderophile abundance pattern in metal is similar to that of Bencubbin; shock stage, S2; weathering grade, W0. Oxygen isotopes (R. Clayton, UChi): light-colored silicates, δ17O = -2.19·, δ18O = +0.53·; dark-colored silicates, δ17O = -1.78·, δ18O = +0.98·. Specimens: 12.2 kg, mostly disintegrated, UMaid; 815 g, MZ; type specimen, 64 g, UCLA; remainder of 282 g mass, Twelker.

Plots: O isotopes:  
Institutions
   and collections
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
USil: Faculty of Earth Sciences, University of Silesia, Bedzinska 60, 41-200 Sosnowiec, Poland; Website (institutional address; updated 19 Dec 2015)
MZ: Aleja na Skarpie 20/26, 27 00-488 Warsaw, Poland, Poland (institutional address; updated 18 Jul 2015)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
UMaid: University of Maiduguri, Borno State, Nigeria (institutional address)
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
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Search for this meteorite in the Natural History Museum collection (U.K.):   
    Require NHM photo
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos:
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Geography:

Nigeria
Coordinates:
     Catalogue of Meteorites:   (11° 29' 30"N, 11° 39' 30"E)
     Recommended::   (11° 29' 30"N, 11° 39' 30"E)
Note: the NHM and MetBase coordinates are 1.1 m apart

Statistics:
     This is 1 of 3 approved meteorites from Yobe, Nigeria
     This is 1 of 18 approved meteorites from Nigeria
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