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Northwest Africa 14685
Basic information Name: Northwest Africa 14685
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14685
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 8 kg
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 19 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14685 (NWA 14685)

(Northwest Africa)

Purchased: 2020

Classification: Lunar meteorite (frag. breccia)

History: Purchased January, 2020 by Mark Lyon from a northwest African dealer

Physical characteristics: Three identical stones, cut surface reveals a fragmental breccia set in a dark-gray ground mass.

Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) This meteorite is a clast-rich polymict breccia with lithic fragments embedded in a fine-grained moderately vesiculated groundmass. Fragmental clasts sizes range from <0.1-6 mm and are primarily basaltic. Kamacite, Cr-spinel, silica, troilite, and ilmenite are present. This meteorite is shocked with some impact melt textures present.

Geochemistry: (A. Ross, UNM) Olivine Fa49.0±17.5, Fe/Mn=93±5, n=6; pigeonite Fs25.5±4.7Wo8.6±1.8, Fe/Mn=51±4, n=3; high-Ca pyroxene Fs31.8±27.2Wo42.6±0.3, Fe/Mn=62±26 n=2; plagioclase An95.1±1.6Ab4.7±1.6Or0.2±0.1, n=4

Classification: Lunar Fragmental Breccia

Specimens: 20 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):8 kg
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):49.0±17.5
Ferrosilite (mol%):25.5±4.7,31.8±27.2
Wollastonite (mol%):8.6±1.8, 42.6±0.3
Classifier:C. Agee, UNM; D. Dickens, NMMS
Type spec mass (g):20
Type spec location:UNM
Main mass:Mark Lyon
Comments:Field Name ML-18; submitted by D. Dickens
   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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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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