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Northwest Africa 14291
Basic information Name: Northwest Africa 14291
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14291
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1100 g
Recommended:  H5-melt breccia    [explanation]

This is 1 of 31 approved meteorites classified as H5-melt breccia.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14291 (NWA 14291)

(Northwest Africa)

Purchased: 2021 Apr

Classification: Ordinary chondrite (H5, melt breccia)

History: Purchased by Craig Zlimen in April 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen consists predominantly of a shock-darkened, melt rock lithology but sparse Type 5 lithic clasts are also present. Accessory phases include kamacite, taenite, low-Ti chromite, merrillite and chlorapatite.

Geochemistry: Olivine (Fa18.4±0.1, range Fa18.3-18.5; Fa16.0; N = 5), low-Ca pyroxene (Fs16.2±0.1Wo1.7±0.1, range Fs16.0-16.3Wo1.6-1.8; Fs17.8Wo1.6; N = 5), augite (Fs6.2±0.2Wo45.2±0.1, range Fs6.0-6.3Wo45.2-45.1, N = 2).

Classification: Ordinary chondrite (H5-melt breccia, clast-poor).

Specimens: 24.4 g including one polished thin section at UWB; remainder with Mr. C. Zlimen.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Apr
Mass (g):1100
Class:H5-melt breccia
Shock stage:S6
Weathering grade:W0/1
Fayalite (mol%):18.4±0.1
Ferrosilite (mol%):16.2±0.1
Wollastonite (mol%):1.7±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.4
Type spec location:UWB
Main mass:C. Zlimen
Comments:Work name ZLI036; 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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