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Bechar 003
Basic information Name: Bechar 003
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 1522 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 280 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 20 Jun 2022
Writeuphelp
Writeup from MB 111:

Bechar 003        30.887°N, 3.301°W

Bechar, Algeria

Find: 2022 Mar 24

Classification: Lunar meteorite (feldspathic breccia)

History: Many small, similar-appearing stones were found together in Algeria on March 24, 2022, by a team represented by David Lehman. Some of the material was also acquired by John Higgins and Jasper Spencer.

Physical characteristics: The stones (total 1522 g) lack fusion crust and have light brown weathered exteriors. Fresh interiors are medium gray with diffuse small white clasts and rare tiny metal grains visible.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Electron microprobe analyses were conducted on small slices from four separate stones. Although there is some mineralogical and compositional heterogeneity among these pieces, all consist of mineral clasts of calcic plagioclase (predominantly anorthite but also some sodic bytownite), olivine, low-Ca pyroxene and augite within a very fine grained, sparsely microvesicular matrix containing Ti-chromite, troilite, kamacite and minor secondary barite.

Geochemistry: Calcic plagioclase (An70.7-97.7Or1.1-0.0, N = 12), olivine (Fa22.9-49.5, FeO/MnO = 86-114, N = 14), low-Ca pyroxene (23.1-26.5Wo4.3-4.4, Fe)/MnO = 56-57, N = 2), pigeonite (Fs22.0-32.3Wo6.9-12.5, FeO/MnO = 52-61, N =7), augite (Fs11.9-19.4Wo35.8-38.6, FeO/MnO = 42-52, N = 5).

Classification: Lunar (feldspathic breccia).

Specimens: 20.14 g including a composite four-slice polished thick section at UWB; 1064 g with Mr. D. Lehman; 483 g with Mr. J. Higgins and Mr. J. Spencer.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Bechar
Date:2022 Mar 24
Latitude:30.887°N
Longitude:3.301°W
Mass (g):1522
Pieces:many
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):22.9-49.5
Ferrosilite (mol%):23.1-26.5; 22.0-32.3; 11.9-19.4
Wollastonite (mol%):4.3-4.4; 6.9-12.5; 35.8-38.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.14
Type spec location:UWB
Main mass:D. Lehman
Comments:Work name DL 1110; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

Algeria
Coordinates:
     Recommended::   (30° 53' 13"N, 3° 18' 4"W)

Statistics:
     This is 1 of 24 approved meteorites from Bechar, Algeria (plus 1 unapproved name)
     This is 1 of 1208 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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