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Northwest Africa 14686
Basic information Name: Northwest Africa 14686
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14686
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 12 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lunar (frag. breccia)
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 32 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14686 (NWA 14686)

(Northwest Africa)

Purchased: 2020

Classification: Lunar meteorite (frag. breccia)

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

Physical characteristics: Eight identical looking stones of varying sizes without fusion crust. Cut surface of one of the stones 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 showing dispersed melt features. Quenched melt pockets were observed enclosing some olivine and pyroxenes grains. Fragmental clasts sizes range from <0.1-8 mm and appear to be primarily basaltic. Kamacite, Cr-spinels, silica, troilite, and ilmenite are present. A range of Cr and Ti oxides were detected. This meteorite is shocked with intermittent impact melt textures present.

Geochemistry: (A. Ross, UNM) Olivine Fa64.4±8.6, Fe/Mn=89±9, n=6; pigeonite Fs40.0±10.0Wo8.0±0.1, Fe/Mn=57±3, n=2; high-Ca pyroxene Fs17.8±9.3Wo34.4±13.6, Fe/Mn=50±7 n=2; plagioclase An96.6±0.8Ab3.2±0.8Or0.2±0.1, n=4

Classification: Lunar Fragmental Breccia

Specimens: 22.1 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):12000
Pieces:8
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):64.4±8.6
Ferrosilite (mol%):40.0±10.0, 17.8±9.3
Wollastonite (mol%):8.0±0.1, 34.4±13.6
Classifier:C. Agee, UNM; D. Dickens, NMMS
Type spec mass (g):22.1
Type spec location:UNM
Main mass:Mark Lyon
Comments:Field Name ML-21; submitted by D. Dickens
Institutions
   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)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
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