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Northwest Africa 14915
Basic information Name: Northwest Africa 14915
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14915
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 2.87 kg
Recommended:  Mesosiderite    [explanation]

This is 1 of 230 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 20 Jun 2022
Writeup from MB 111:

Northwest Africa 14915 (NWA 14915)

(Northwest Africa)

Purchased: 2021 Sep

Classification: Mesosiderite

History: Purchased by Juan Avil├ęs Poblador in September 2021 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Heterogeneous breccia composed predominantly of zoned orthopyroxene (some grains up to 7 mm), calcic plagioclase and altered metal (overall ~50 vol.%) together with accessory Cu-bearing pentlandite, troilite, aluminous low-Ti chromite (V-bearing), ilmenite and merrillite. A 1.7 cm by 1 cm cataclastic dunite clast composed predominantly of olivine exhibiting undulose extinction is present in one of the two studied thin sections.

Geochemistry: Low-Ca pyroxene (cores Fs23.3-27.0Wo2.5-2.9, FeO/MnO = 30-33, N = 4; rims Fs28.7-34.0Wo2.5-4.0, FeO/MnO = 21-26, N = 4), augite (Fs16.4-17.1Wo41.9-40.9, FeO/MnO = 20-21, N = 2), plagioclase (An89.9-92.1Or0.2-0.3, N = 3).

Classification: Mesosiderite.

Specimens: 259.4 g including two polished thin sections at UWB; remainder with Mr. J. Poblador.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Sep
Mass (g):2870
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):24.4-27.0; 31.7-34.0
Wollastonite (mol%):2.7-2.9; 2.5-4.0
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):259.4
Type spec location:UWB
Main mass:J. Poblador
Comments:Work names JAP21-1 and JAP21-2; 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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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