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Northwest Africa 15303
Basic information Name: Northwest Africa 15303
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15303
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 179 g
Recommended:  Achondrite (brachinite-like)    [explanation]

This is 1 of 4 approved meteorites classified as Achondrite (brachinite-like).   [show all]
Search for other: Primitive achondrites, Ungrouped achondrites
Comments: Approved 12 Nov 2022
Writeup from MB 111:

Northwest Africa 15303 (NWA 15303)

(Northwest Africa)

Purchased: 2022 Mar

Classification: Achondrite (brachinite-like)

History: Purchased by Roberto Vargas and Sabrina Badal in March 2022 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Protogranular aggregate (mean grainsize ~0.7 mm) of predominantly olivine with subordinate orthopyroxene and augite plus accessory low-Ti chromite, altered kamacite, taenite and troilite (mostly altered). Plagioclase is absent.

Geochemistry: Olivine (Fa26.9-27.2, FeO/MnO = 52-57, N = 4), orthopyroxene (Fs22.2-22.6Wo2.1-2.2, FeO/MnO = 32-34, N = 4), augite (Fs9.2-9.3Wo43.5-44.4, FeO/MnO = 22-26, N = 4).

Classification: Achondrite (brachinite-like).

Specimens: 22.0 g including one polished thin section at UWB; remainder with Mr. R. Vargas and Ms. S. Badal.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022 Mar
Mass (g):179
Class:Achondrite (brachinite-like)
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):26.9-27.2
Ferrosilite (mol%):22.2-22.6; 9.2-9.3
Wollastonite (mol%):2.1-22.; 43.5-44.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.0
Type spec location:UWB
Main mass:R. Vargas and S. Badal
Comments:Work name RV22-1; 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. 111, in preparation (2022)
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     This is 1 of 8746 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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