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Northwest Africa 13948
Basic information Name: Northwest Africa 13948
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13948
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 104 g
Classification
  history:
Recommended:  Acapulcoite    [explanation]

This is 1 of 86 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 29 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13948 (NWA 13948)

(Northwest Africa)

Purchased: March, 2021

Classification: Primitive achondrite (Acapulcoite)

History: The meteorite was purchased from a meteorite dealer in Nouadhibou, Mauritania, in early March, 2021.

Physical characteristics: Brownish rock without fusion crust.

Petrography: The meteorite shows a protogranular texture of predominantly orthopyroxene and olivine (mean diameter about 400 µm, up to 700 µm) sometimes poikilitically enclosing rounded to subrounded Ca-pyroxene grains. Accessories are merrillite and chlorapatite; opaque phases include chromite, troilite, kamacite, and schreibersite. No relict chondrules were observed. Plagioclase is absent in the section study. Grain boundaries are frequently decorated with iron oxides and hydroxides.

Geochemistry: Olivine: Fa8.8±0.2 (Fa8.6-9.1, FeO/MnO=16±1, n=11); low-Ca pyroxene: Fs11.9±0.1Wo2.5±0.2 (Fs11.8-12.1Wo1.9-2.9, FeO/MnO=15±1, n=11); Ca-pyroxene: Fs5.3±0.3Wo43.7±1.2 (Fs4.7-5.9Wo40.5-45.3, FeO/MnO=10±1, n=11)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P March, 2021
Mass (g):104
Pieces:1
Class:Acapulcoite
Shock stage:S1
Weathering grade:strong
Fayalite (mol%):8.8
Ferrosilite (mol%):11.9; 5.3
Wollastonite (mol%):2.5; 43.7
Classifier:A. Greshake, MNB
Type spec mass (g):21.7
Type spec location:MNB
Main mass:Salamu Ali
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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