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Northwest Africa 13912
Basic information Name: Northwest Africa 13912
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13912
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 11.85 kg
Meteoritical Bulletin:  MB 110  (2022)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 277 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 25 Apr 2021
Writeup from MB 110:

Northwest Africa 13912 (NWA 13912)

(Northwest Africa)

Purchased: 2020 Dec

Classification: Mesosiderite

History: Purchased by Luc Labenne in Decemer 2020 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen is composed predominantly of zoned orthopyroxene, anorthite and metal (~45 vol.%, kamacite+taenite) with accessory augite, olivine, silica polymorph, merrillite and troilite.

Geochemistry: Orthopyroxene (Fs22.3-32.3Wo1.5-3.9, FeO/MnO = 23-30, N = 5), augite (Fs18.7-18.9Wo37.9-40.3, FeO/MnO = 18-20, N = 2), olivine (Fa34.4-37.1, FeO/MnO = 33-39, N = 2), anorthite (An91.0-96.1Or0.2-0.0, N = 2).

Classification: Mesosiderite.

Specimens: 20.2 g in the form of a polished endcut at UWB; remainder with Mr. L. Labenne.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Dec
Mass (g):11850
Shock stage:low
Weathering grade:low
Fayalite (mol%):34.4-37.1
Ferrosilite (mol%):22.3-32.3; 18.7-18.9
Wollastonite (mol%):1.5-3.9; 37.9-40.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:L. Labenne
Comments:Work name LAB21-13; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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