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Bou Kra 004
Basic information Name: Bou Kra 004
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2010
Country: Western Sahara
Mass:help 273 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 228 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 27 Apr 2013
Writeuphelp
Writeup from MB 102:

Bou Kra 004        26.707°N, 12.759°W

Saguia el Hamra, Western Sahara

Found: 2010 Sep 25

Classification: HED achondrite (Eucrite, monomict)

History: Found by Pjotr Muromov and Svend Buhl on September 25, 2010, on the G’idat Amwizirat plateau in Western Sahara (substrate is fine-grained limestone and chert desert pavement).

Physical characteristics: Two fresh, larger fragments (130.4 g and 93.80 g) coated by black fusion crust (and in turn by clusters of the fruticose lichen Ramalina maciformis), plus many small fragments weighing 17.0 g (>5 mm) and 31.5 g (<5 mm) total. All fragments were found within a 3.5 m radius, and fit together to form a heart-shaped and completely fusion-crusted mass.

Petrography: (A. Irving and S. Kuehner, UWS): Ophitic assemblage of exsolved pigeonite and calcic plagioclase with accessory silica polymorph, ilmenite, troilite, Ti-chromite and rare zircon. Pyroxenes contain dusty zones of microscopic troilite inclusions.

Geochemistry: Low-Ca pyroxene Fs58.8Wo5.6 (FeO/MnO = 29.8-30.7), high-Ca pyroxene Fs28.3-28.5Wo42.0-41.9 (FeO/MnO = 33.1-33.9).

Classification: Eucrite (unbrecciated, basaltic).

Specimens: 20.3 g of type material and one polished thin section are on deposit at UWB. Some of the remaining material was donated to the University of Casablanca, and the rest is held by SBuhl.

Data from:
  MB102
  Table 0
  Line 0:
State/Prov/County:Saguia el Hamra
Origin or pseudonym:G'idat Amwizirat
Date:2010 Sep 25
Latitude:26.707°N
Longitude:12.759°W
Mass (g):272.75
Pieces:2 + fragments
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):58.8; 28.3-28.5
Wollastonite (mol%):5.6; 42.0-41.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.3
Type spec location:UWB
Main mass:S. Buhl
Comments:B-376; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
SBuhl: Meteorite Recon (Mr. S Buhl), Muehlendamm 86, 22087 Hamburg, Germany (private address; updated 14 May 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John A. Shea   
Geography:

Western Sahara
Coordinates:
     Recommended::   (26° 42' 25"N, 12° 45' 32"W)

Statistics:
     This is 1 of 87 approved meteorites from Saguia el Hamra, Western Sahara (plus 1 unapproved name)
     This is 1 of 210 approved meteorites from Western Sahara (plus 20 unapproved names)
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