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Northwest Africa 15120
Basic information Name: Northwest Africa 15120
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15120
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 190 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Winonaite
MB 113  (2024)  Achondrite-prim-ung
Recommended:  Achondrite-prim-ung    [explanation]

This is 1 of 7 approved meteorites classified as Achondrite-prim-ung.   [show all]
Search for other: Primitive achondrites, Ungrouped achondrites
Comments: Approved 1 Oct 2022
Revised 11 Jan 2024: Reclassified with NWA 15061
Writeuphelp
Writeup from MB 111:

Northwest Africa 15120 (NWA 15120)

(Northwest Africa)

Purchased: 2022

Classification: Primitive achondrite (Winonaite)

History: Purchased by Shun-Chung Yang in 2022 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Equigranular aggregate of enstatite, forsterite, diopside and intermediate plagioclase (andesine) with accessory kamacite (almost completely altered to Fe oxides), troilite and daubreelite. Grain boundaries have thin coatings of secondary Fe hydroxides.

Geochemistry: Enstatite (Fs1.3-1.5Wo0.9-1.0, N = 6), forsterite (Fa1.0-1.3, N = 6), diopside (Fs0.6-0.7Wo41.9-42.0, N = 4), plagioclase (Ab59.6-62.7An40.1-37.0Or0.2-0.4, N = 5), kamacite (Ni 5.4-6.3 wt.%, Si < 0.02 wt.%, N = 7).

Classification: Winonaite. The material was obtained from the same source as NWA 15061, and is evidently paired with it on the basis of essentially identical texture, mineral compositions and degree of terrestrial alteration of metal.

Specimens: 22.0 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2022
Mass (g):190
Pieces:1
Class:Winonaite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):1.2±0.1
Ferrosilite (mol%):1.4±0.1
Wollastonite (mol%):1.0±0.0
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):22.0
Type spec location:UWB
Main mass:S.-C. Yang
Comments:Work name SCY-62; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)
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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Domjan Svilkovic   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
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Revision
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