LUNAR METEORITE

N974-ALUN50

MOON ROCK

This is a half stone of a Lunar meteorite found 2021 in the Western Sahara. The outer crust is a mix of ablated fusion crust and desert varnish, having small white breccia sprinkling the surface. The cut side is polished consisting of gray angular chards in a black matrix. It also has more than a dozen of white calcite inclusions; a few metallic flakes; and tiny voids. Photographed in 9 cm square jewelry box.

40 x 34 x 25 mm

50.9 g end-piece

PPG: $198.43

$10,100.00

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NWA 13974

Location:
  • Western Sahara
Found: FIND 2021
Group:
  • Stone
Total known weight: 7940

METEORITICAL SOCIETY REPORT:
Northwest Africa 13974 (NWA 13974)
Purchased: 2021
Classification: Lunar meteorite

History: Multiple complete individuals ranging in size from 1 - 800 g were found in the Western Sahara. Adam Aaronson purchased the samples in Temara in 2021

Physical characteristics: Exterior of the 20% of the samples is light orangish-gray in color and shows voids, some of which are circular in profile. The cut face shows the interior is darker grey and shows a brecciated texture. Other samples found on the surface are reported to have a shiny black wind-ablated exterior.

Petrography: Description and classification (A. Love, App) Sample is a complex breccia composed of rounded to irregular-shaped, mm-sized lithic and anhedral mineral clasts surrounded by a melt matrix. Lithic clasts include: anorthosite, norite, troctolite, brecciated and shock melted clasts. Mineral clasts are dominantly anorthite with minor zoned olivine. Matrix areas within the thin section show some regions with flow-textured glass and fine vesicles. Additional minerals are: <1vol% FeNi grains, chromite, ilmenite, sulfide, secondary barite and calcite. Geochemistry: (A. Love, App) Olivine (Fa29.1±6.8, Fe/Mn=66-92, n=29); low Ca pyroxene (Fs21.3±3.2Wo4.4±0.5, Fe/Mn=49-55, n=7); pigeonite (Fs24.4±4.0Wo9.0±3.9, Fe/Mn=48-59, n=13); high Ca Pyroxene (Fs11.7±2.1Wo38.6±6.3, Fe/Mn=40-47, n=4); plagioclase (An97.2±0.7Or0.1±0.1, n=18). Classification: lunar (feldspathic melt breccia A-S3, low weathering). Textures and mineral compositions (Fe/Mn ratios for Olivine and pyroxene and An content of plagioclase) indicate sample is a melt breccia of lunar origin.

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LUNAR METEORITE