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Basic information Name: Bilanga
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 1999
Country: Burkina Faso
Mass:help 25 kg
NHM Catalogue:  5th Edition  (2000)  Diogenite
Meteoritical Bulletin:  MB 84  (2000)  Diogenite
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 520 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeup from MB 84:


Bilanga, Burkina-Faso

Fell 1999 October 27, 10:30 local time

Achondrite (diogenite)

After a widely witnessed shower, at least 25 kg of meteorites with fresh black fusion crust were collected, comprising many stones.  Pieces are reported to have fallen in the villages of Bilanga-Yanga and Gomponsago (coordinates above apply to the latter).  Classi­fication and mineralogy (A. Bischoff, Mün):  a diogenitic breccia; Ca-poor pyroxene, Fs19–22, mean Fs20.5; plagioclase, An75–83; Ca-rich pyroxene is rare, one grain has En46.4Fs6.3Wo47.4. Oxygen isotopes (R. Clayton, UChi):  δ18O = +3.41‰, δ17O = +1.35‰.  Specimens:  7.5 kg, Casper; 4 kg, Heinlein; type specimen, 8 g, Mün; 25 g, NHM; 20 g, TCU; 80 g, Frei; 600 g, SI.

Plots: O isotopes:  
   and collections
Frei: Universität Freiburg, Mineralogisch-Petrographisches Institut, Albertstrasse 23b, D-79104 Freiburg, Germany (institutional address)
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
TCU: Oscar E. Monnig Collection, Department of Geology, Texas Christian University, Ft. Worth, TX 76129, United States; Website (institutional address; updated 24 Feb 2012)
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
Casper: Michael I. Casper, Meteorites, Inc., P.O. Drawer J, Ithaca, NY 14851, United States; Website (private address)
Heinlein: Dieter Heinlein, Lilienstrasse 3, 86156 Augsburg, Germany; Website (private address)
Mün: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
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.):   
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References: Published in Meteoritical Bulletin, no. 84, MAPS 35, A199-A225 (2000)
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Photos from the Encyclopedia of Meteorites:
Copyright R.A. Langheinrich Meteorites www.nyrockman.com   
Photograph by Geoffrey Notkin © Oscar E. Monnig Meteorite Gallery   
Shinishi Kato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
David Hardy   
Denis gourgues   
Dominik Stoeckli   
Jay Piatek   
jean bernard Delbauve   
José Carlos de Medeiros Júnior   
KD Meteorites   
Marcin Cimala      
Paulo Anselmo Matioli (JN Science Museum)   
Peter Marmet   
Robert Smart   
Ryan Upchurch   
Svend Buhl   
Volker Heinrich   
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Burkina Faso
     Catalogue of Meteorites:   (12° 27'N, 0° 5'W)
     Recommended::   (12° 27'N, 0° 5'W)

     This is 1 of 2 approved meteorites from Gnagna, Burkina Faso
     This is 1 of 10 approved meteorites from Burkina Faso
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