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Northwest Africa 14540
Basic information Name: Northwest Africa 14540
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14540
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 25.3 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 344 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 19 Feb 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14540 (NWA 14540)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Lunar meteorite (feldspathic breccia)

Petrography: (J. Gattacceca, CEREGE) Mineral clasts (Ca-pyroxene, olivine, plagioclase) to 200 µm set in a quenched melt rock matrix composed of µm-sized pyroxene in a feldspathic mesostasis. Metal, troilite, ilmenite are present. One mm-sized subophitic clast with 50 µm grain size is present.

Geochemistry: Olivine Fa39.5±1.0, FeO/MnO = 94.0 (n=4). Ca-pyroxene Fs18.1±7.7Wo34.3±10.8, range Fs10.1-32.8, range Wo13.0-43.3, FeO/MnO = 54.0±12.7 (n=8). Plagioclase An95.8Ab3.9Or0.3 (n=6). Chromite Cr# = 0.75.

Classification: Lunar meteorite (Feldspathic breccia)

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2021 Mar
Mass (g):25.3
Pieces:1
Class:Lunar (feldsp. breccia)
Weathering grade:low
Fayalite (mol%):40.5 (n=2)
Ferrosilite (mol%):18.1±7.7 (n=8)
Wollastonite (mol%):34.3±10.8
Magnetic suscept.:2.29
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):5.66
Type spec location:CEREGE
Main mass:Kuntz
Finder:anonymous
Comments:work name K538; submitted by Jérôme Gattacceca
Institutions
   and collections		 CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
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 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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