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Northwest Africa 14273
Basic information Name: Northwest Africa 14273
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14273
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1200 g
Classification
  history:
Recommended:  Achondrite-ung    [explanation]

This is 1 of 118 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 21 Jan 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14273 (NWA 14273)

(Northwest Africa)

Purchased: 2020 Dec

Classification: Ungrouped achondrite

History: Purchased by Ziyao Wang in December 2020 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen has an overall igneous texture (in part poikilitic) with a mean grainzsize of ~0.2 mm, and constituent minerals exhibit very limited compositional zoning. Composed predominantly of olivine (uniformly brown in thin section) and pyroxene (with low-Ca cores, pigeonite mantles and augite rims) accompanied by interstitial glass with crystallites. Accessory phases are troilite, altered kamacite, taenite, low-Ti chromite and minor secondary barite; sodic plagioclase and phosphates are absent.

Geochemistry: Olivine (Fa24.9-27.4, FeO/MnO = 45-50, N = 5), low-Ca pyroxene (Fs16.6-17.2Wo1.3-1.5, FeO/MnO = 30-31, N = 5), pigeonite (Fs18.9-20.0Wo8.6-13.5, FeO/MnO = 25, N = 2), subcalcic augite (Fs14.0Wo32.8, FeO/MnO = 21), augite (Fs12.2Wo39.4, FeO/MnO =22).

Classification: ungrouped igneous achondrite with L chondrite affinities. This specimen lacks recognizable relict chondrules, but has an anomalous relatively coarse-grained igneous texture. The igneous texture and presence of brown olivine may be indicative of high shock.

Specimens: 26.4 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2020 Dec
Mass (g):1200
Pieces:1
Class:Achondrite-ung
Shock stage:S6
Weathering grade:low
Fayalite (mol%):25.2-27.4
Ferrosilite (mol%):16.6-17.2; 12.2-14.0
Wollastonite (mol%):1.3-1.5; 39.4-32.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):26.4
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-30; 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 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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