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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
Meteoritical Bulletin:  MB 111  (2023)  Achondrite (brachinite-like)
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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Domjan Svilkovic   
Ryan Upchurch   

     This is 1 of 9559 approved meteorites from (Northwest Africa) (plus 1872 unapproved names)

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