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Northwest Africa 15051
Basic information Name: Northwest Africa 15051
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15051
Observed fall: No
Year found: 2021
Country: Western Sahara
Mass:help 106 g
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 20 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 23 Jul 2022
Writeup from MB 111:

Northwest Africa 15051 (NWA 15051)

Western Sahara

Purchased: 2021

Classification: Lunar meteorite (frag. breccia)

History: Found by nomads in Western Sahara. Bought by Steve Arnold through a Moroccan Broker in November 2021 and a week-long team search of the find location in Nov 2021 by Arnold, the broker and the finders turned up no other specimens from the area.

Physical characteristics: Saw cut surface shows numerous white, light gray and dark gray clasts set in a very dark gray to black host groundmass.

Petrography: (C. Agee, UNM) Electron microprobe analysis and reflected light microscopy indicate a fragmental breccia. Major phases are plagioclase, pyroxene, and olivine; minor phases, chrome spinel (Ti,Al-rich), chromite, ilmenite, troilite, and Fe-metal (low Ni) were detected.

Geochemistry: (A. Ross, UNM) Olivine Fa34.9±7.8, Fe/Mn=97±13, n=5; low-Ca pyroxene Fs37.6±2.9Wo2.4±0.5, Fe/Mn=63±2, n=2; pigeonite Fs28.5±11.7Wo7.1±0.9, Fe/Mn=54±9, n=2; augite Fs20.4±1.2Wo41.2±1.7, Fe/Mn=49±7, n=2; plagioclase An97.6±0.4, n=4.

Classification: Lunar fragmental breccia

Specimens: 20.1 g on deposit at UNM, Steve Arnold holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):106
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):34.9±7.8
Ferrosilite (mol%):37.6±2.9, 28.5±11.7, 20.4±1.2
Wollastonite (mol%):2.4±0.5, 7.1±0.9, 41.2±1.7
Classifier:C. Agee, UNM
Type spec mass (g):20.1
Type spec location:UNM
Main mass:Steve Arnold
Comments:Fieldname SA-20; submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Western Sahara

     This is 1 of 259 approved meteorites from Western Sahara (plus 20 unapproved names)

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