.516 grams 11x10x3mm Bechar 003 Lunar Meteorite a polished side slice with COA

Description

Bechar 003
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:
1522 grams
Recommended:
Lunar (feldsp. breccia)
This is 1 of 280 approved meteorites classified as Lunar (feldsp. breccia).
Approved 20 Jun 2022
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 (An
70.7-97.7
Or
1.1-0.0
, N = 12), olivine (Fa
22.9-49.5
, FeO/MnO = 86-114, N = 14), low-Ca pyroxene (23.1-26.5Wo
4.3-4.4
, Fe)/MnO = 56-57, N = 2), pigeonite (Fs
22.0-32.3
Wo
6.9-12.5
, FeO/MnO = 52-61, N =7), augite (Fs
11.9-19.4
Wo
35.8-38.6
, 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.
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
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