1.54 grams 14mm NWA 15373 as found Lunar fragmental breccia meteorite with a COA

Description

Northwest Africa 15373
Name:
Northwest Africa 15373
This is an OFFICIAL meteorite name.
Abbreviation:
NWA 15373
Observed fall:
No
Year found:
2022
Country:
(Northwest Africa)
Mass:
45 kg
Recommended:
Lunar (frag. breccia)
This is 1 of 25 approved meteorites classified as Lunar (frag. breccia).
Approved 12 Nov 2022
Northwest Africa 15373
(NWA 15373)
(Northwest Africa)
Purchased: 2022
Classification: Lunar meteorite (frag. breccia)
History
: Mark Lyon purchased this meteorite from a Moroccan meteorite dealer in 2022.
Physical characteristics
: Many identically appearing pieces totaling 45 kg found together. The largest individual piece is 2.6 kg. Dark colored, irregular exterior lacking fusion crust. Saw-cut surface reveals a fragmental breccia with light and dark colored clasts set in a dark-gray groundmass
Petrography
: (C. Agee and A. Ross,
UNM
) Reflected light microscopy and electron microprobe analysis confirms a lunar fragmental breccia with lithic clasts, mineral clasts, and shock melt. Major phases are plagioclase, pigeonite, augite, and olivine. Minor phases include low-Ni iron metal, ilmenite, troilite, chromite, silica and Ti-Cr spinel.
Geochemistry
: (A. Ross,
UNM
) Plagioclase An
96.5±0.5
Ab
3.3±0.5
, n=5; pigeonite Fs
25.7±6.1
Wo
5.1±3.0
, Fe/Mn=55±6, n=5; augite Fs
16.0±2.3
Wo
36.5±3.4
, Fe/Mn=45±4, n=4; olivine Fa
28.3±5.4
, Fe/Mn=95±11, n=10.
Classification
: Lunar fragmental breccia
Specimens
: 20.4 g on deposit at
UNM
, Mark Lyon holds the main mass.
Place of purchase:
Morocco
Date:
P 2022
Mass (g):
45000
Pieces:
Many
Class:
Lunar (frag. breccia)
Shock stage:
high
Weathering grade:
moderate
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