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Northwest Africa 14453
Basic information Name: Northwest Africa 14453
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14453
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 197.1 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 425 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 6 Aug 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14453 (NWA 14453)

(Northwest Africa)

Purchased: 2018 Dec

Classification: HED achondrite (Howardite)

History: Purchased by Ziyao Wang in December 2018 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Complex polymict breccia containing lithic clasts and related mineral debris derived from both eucrite and feldspathic or noritic diogenite materials. Estimated proportions are ~70 vol.% diogenitic and ~30 vol.% eucritic material. Diogenitic orthopyroxene exhibits undulose extinction and accompanying plagioclase is polycrystalline. The majority of the eucrite clasts are recrystallized/granulitic, fine-grained intergranular-textured lithologies. Accessory phases include silica polymorph (present in the groundmasses of eucrite clasts), ilmenite, medium-Ti chromite, zircon and troilite, plus minor secondary Fe oxide, barite and calcite; no metal was observed.

Geochemistry: Eucritic low-Ca pyroxene (Fs58.4-60.0Wo3.5-5.2, FeO/MnO = 32-36, N = 4), eucritic augite (Fs26.8-28.1Wo41.6-42.9, FeO/MnO = 33-35, N = 4), low-Ca pyroxene (Fs44.4Wo1.6, FeO/MnO = 30), diogenitic orthopyroxene (Fs32.7-36.6Wo1.8-2.4, FeO/MnO = 28-29, N = 4), diogenitic augite (Fs11.8-15.5Wo44.7-46.7, FeO/MnO = 22-26, N = 5), eucritic plagioclase (An81.2-89.4Or1.3-0.5, N = 3), diogenitic plagioclase (Fs89.6-92.5Or0.6-0.3, N = 3).

Classification: Howardite.

Specimens: 28.7 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2018 Dec
Mass (g):197.1
Pieces:1
Class:Howardite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):32.7-36.6; 11.8-15.5; 58.4-60.0; 26.8-28.1; 44.4
Wollastonite (mol%):1.8-2.4; 44.7-46.7; 3.5-5.2; 41.6-42.9; 1.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):28.7
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-51; submitted by A. Irving
Institutions
   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)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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