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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:
Meteoritical Bulletin:  MB 111  (2023)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 459 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)
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Revision
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