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Basic information Name: Bouri
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1996
Country: Ethiopia
Mass:help 9.1 kg
Meteoritical Bulletin:  MB 94  (2008)  H4
Recommended:  H4    [explanation]

This is 1 of 6459 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 17 Oct 2008
Writeup from MB 94:

Bouri              10°16N; 40°34E

Middle Awash, Ethiopia

Find: Fall 1996

Ordinary Chondrite (H4)

History: Over 30 fragments scattered over 100 m radius were collected from the surface of Pliocene sediments, with which they bear no apparent relationship, and none were found in situ. The meteorite fragments were discovered and collected by Prof. Tim White of the Department of Integrative Biology, University of California at Berkeley, in the fall of 1996 and subsequently, in the framework of the Middle Awash Project (see Asfaw et al. 2002). A total of 9.1 kg with one piece weighing more than 5 kg was collected and none is left in the field. All meteorite fragments are stored at the National Museum of Ethiopia (NME) in Addis Ababa. Dr. Giday WoldeGabriel took a fragment weighing about 40 g to the United States for characterization. Recently Dr. Tamrat Endale took an additional fragment (35 g) for analysis at CEREGE, France.

Results from Los Alamos National Laboratory: Preliminary petrographic analysis indicates thermally metamorphosed, strongly fractured, and altered coarse mafic minerals embedded in highly weathered metallic oxide. The bulk chemistry is SiO2 (34.7 wt%), iron oxide (Fe2O3T = >33 wt%), and MgO (22 wt%). Neutron activation analysis yielded Ni (13,747 ppm) and Cr (3516 ppm).

Physical characteristics: The exterior of the specimen is weathered but shows a glassy fusion crust. The interior is black-brown with visible metal and chondrules. Magnetic susceptibility is logχ = 4.68 (10–9 m3/kg), in agreement with a weathered H.

Petrography: (M. Bourot-Denise, MNHNP, J. Gattacceca, CEREGE) microscopic observation of a polished section reveals a chondrite texture. Chromite-plagioclase assemblages are present. Metallic copper is found associated with taenite-kamacite grains. Weathering grade is estimated to be W4 in the MNHNP sample and W6 in the Los Alamos sample examined by M. Killgore.

Mineral compositions and geochemistry: Olivine is homogeneous (Fa20.1 ± 0.4%,) and low Ca pyroxene displays the typical scatter for a type 4 chondrite (Fs14.8 ± 3.8%).

Classification: H4, W4, S4.

Type specimens: The type specimens include a 15 g piece on deposit at CEREGE and the main mass of 9 kg at the National Museum of Ethiopia (NME), Addis Ababa.

Data from:
  Table 1
  Line 2:
State/Prov/County:Middle Awash, Ethiopia
Mass (g):9.1
Shock stage:S4
Weathering grade:W4
Fayalite (mol%):20.1
Ferrosilite (mol%):14.8
Magnetic suscept.:4.68
Classifier:J. Gattacceca (CEREGE) and M. Bourot-Denise (MNHN)
Type spec mass (g):9000
Type spec location:CEREGE and NME
Main mass:NME
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
NME: National Museum of Ethiopia, Ethiopia (institutional address; updated 3 Mar 2011)
Killgore: Marvin and Kitty Killgore, Southwest Meteorite Laboratory, P.O. Box 95, Payson, AZ 85547, United States; Website (private address)
MNHN: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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     Recommended::   (10° 16'N, 40° 34'E)

     This is 1 of 2 approved meteorites from Harerge, Ethiopia
     This is 1 of 6 approved meteorites from Ethiopia
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