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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:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 280 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 29 Oct 2018)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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