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Northwest Africa 14267
Basic information Name: Northwest Africa 14267
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14267
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1978 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 421 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 11 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14267 (NWA 14267)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Howardite)

History: Purchased by Grant Harkness in 2021 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Complex breccia dominated by angular clasts of diogenitic orthopyroxene (exhibiting undulose extinction, with a wide range in Fe/Mg) plus ~25 vol.% lithic eucrite clasts and related mineral debris (exsolved pigeonite, unexsolved pigeonite and anorthite). The most ferroan orthopyroxene and some of the anorthite may be derived from feldspathic to noritic diogenite lithologies. Accessory phases include olivine (with a range in Fe/Mg), silica polymorph, ilmenite, Ti-free chromite and troilite.

Geochemistry: Diogenitic orthopyroxene (Fs20.6-33.4Wo1.3-3.8, FeO/MnO = 27-30, N = 5), olivine (Fa13.4-28.4, FeO/MnO = 43-50, N = 4), orthopyroxene hosts (Fs62.2Wo2.9; Fs48.8Wo1.9; FeO/MnO = 30, N = 2), augite exsolution lamellae (Fs23.6-27.2Wo41.6-41.8; Fs19.3Wo43.7; FeO/MnO = 26-32, N = 3), pigeonite (Fs48.9Wo15.9; Fs50.5Wo6.0; FeO/MnO = 29-30; N = 2), anorthite (An92.5-95.2Or0.3-0.0, N = 3).

Classification: Howardite (diogenite-rich).

Specimens: 44.8 g including one polished thin section at PSF; remainder in the Harkness Collection.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):1978
Pieces:1
Class:Howardite
Shock stage:low
Weathering grade:low
Fayalite (mol%):13.4-41.3
Ferrosilite (mol%):20.6-33.4; 48.8-62.2; 19.3-27.2
Wollastonite (mol%):1.3-3.8; 1.9-6.0; 41.6-43.7
Classifier:A. Irving, UWS, and J. Boesenberg, Brown U.
Type spec mass (g):44.8
Type spec location:PSF
Main mass:Harkness Collection
Comments:Work name HC-28; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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