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Northwest Africa 14183
Basic information Name: Northwest Africa 14183
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14183
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 453 g
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 6 Oct 2021
Writeup from MB 110:

Northwest Africa 14183 (NWA 14183)


Purchased: 2021 Mar

Classification: HED achondrite (Howardite)

History: Found in Algeria and purchased by Jason Bliss in March 2021 from a Moroccan dealer in Spain.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of subequal amounts of eucrite and diogenite lithic clasts plus related crystal debris within a finer grained matrix containing minor altered kamacite. Eucrite lithologies include intergranular, subophitic and gabbroic textural varieties composed of exsolved pigeonite and calcic plagioclase with accessory silica polymorph, ilmenite and troilite. Diogenite clasts are composed predominantly of orthopyroxene with minor accessory chromite. A thin, dark glassy shock veinlet crossuts the studied thin section.

Geochemistry: Low-Ca pyroxene hosts (Fs47.8-59.2Wo2.1-3.1, FeO/MnO = 28-31, N = 3), augite exsolution lamellae (Fs20.4-21.7Wo43.7-42.2, FeO/MnO = 25-29, N = 2), diogenitic orthopyroxene (Fs21.5-24.5Wo2.2-2.7, FeO/MnO = 24-30, N = 4), pigeonite (Fs0.3Wo17.8, FeO/MnO = 32), low-Ca pyroxene in matrix (Fs38.2Wo2.1, FeO/MnO = 26), plagioclase (An85.0-92.5Or0.7-0.1, N = 3).

Classification: Howardite.

Specimens: 22 g including one polished thin section at UWB; remainder with Mr. J. Bliss.

Data from:
  Table 0
  Line 0:
Place of purchase:Spain
Date:P 2021 Mar
Mass (g):453
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):47.8-59.2; 20.4-21.7; 21.5-24.5
Wollastonite (mol%):2.1-3.1; 43.7-42.2; 2.2-2.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22
Type spec location:UWB
Main mass:J. Bliss
Comments:Work name JB21-1; 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. 110, in preparation (2021)
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     This is 1 of 1213 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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