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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
Recommended:  Mesosiderite    [explanation]

This is 1 of 221 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8024 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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