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Northwest Africa 14144
Basic information Name: Northwest Africa 14144
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14144
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1215 g
Recommended:  Mesosiderite    [explanation]

This is 1 of 216 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 31 Aug 2021
Writeup from MB 110:

Northwest Africa 14144 (NWA 14144)

(Northwest Africa)

Purchased: 2021 Jan

Classification: Mesosiderite

History: Purchased by Jason Whitcomb in January 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Aggregate composed predominantly of compositionally-zoned low-Ca pyroxene, anorthite and metal (~50 vol.%) together with accessory subcalcic augite, silica polymorph and merrillite (associated with minor stanfieldite). Pyroxene grains (some up to 1.8 cm in size) have more ferroan and more calcic rims relative to cores. Metal grains (some up to 1 cm in size) are composed of kamacite + taenite.

Geochemistry: Low-Ca pyroxene cores (Fs23.3-23.7Wo1.0-1.9, FeO/MnO = 30, N = 2), low-Ca pyroxene rims (Fs31.4-33.2Wo4.2-5.9, FeO/MnO = 25-29, N = 4), subcalcic augite (Fs22.1Wo25.8, FeO/MnO = 20), anorthite (An91.3-91.4Or0.3, N = 2).

Classification: Mesosiderite.

Specimens: 31.8 g in the form of a polished slice at PSF; remainder with Mr. J. Whitcomb.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Jan
Mass (g):1215
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):23.3-23.7;31.4-33.2; 22.1
Wollastonite (mol%):1.0-1.9; 4.2-5.9; 25.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):31.8
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-12; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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