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Northwest Africa 15023
Basic information Name: Northwest Africa 15023
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15023
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1046 g
Classification
  history:
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 65 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Jul 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15023 (NWA 15023)

(Northwest Africa)

Purchased: 2022 Jan

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased by Terry Boudreaux in January 2022 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Complex breccia composed of lithic diabasic eucrite clasts and related debris within a fine grained, partly melt-textured matrix (characterized by the presence of very thin, acicular plagioclase grains). Diabasic eucrite material consists predominantly of zoned low-Ca pigeonitic pyroxene (lacking exsolution) and calcic plagioclase with accessory subcalcic augite, silica polymorph, fayalite, ilmenite and troilite. No diogenite components were observed. The studied thin section also contains a vitric breccia clast (with almost opaque, sepia brown matrix).

Geochemistry: Low-Ca pyroxene cores (Fs30.7-37.7Wo5.3-7.0, FeO/MnO = 28-35, N = 3), ferroan low-Ca pyroxene rims (Fs49.4-69.9Wo4.0-10.5, FeO/MnO = 32-37, N = 5), pigeonite (Fs48.7-53.1 Wo12.7-19.4, FeO/MnO = 31, N = 3), subcalcic augite (Fs55.3Wo24.5, FeO/MnO = 35), fayalite (Fa83.6-90.8, FeO/MnO = 41-44, N = 4), plagioclase (An89.6-92.9Or0.3-0.2, N = 3).

Classification: Eucrite (melt-matrix breccia, diabasic with unexsolved pyroxene).

Specimens: 24.6 g including one polished thin section at UWB; remainder with Mr. T. Boudreaux.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2022 Jan
Mass (g):1046
Pieces:1
Class:Eucrite-melt breccia
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):83.6-90.8
Ferrosilite (mol%):30.7-37.7; 49.4-69.9; 48.7-53.1; 55.3
Wollastonite (mol%):5.3-7.0; 4.0-10.5; 12.7-19.4; 24.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.6
Type spec location:UWB
Main mass:T. Boudreaux
Comments:Work name RC158.4; 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)
Boudreaux: Terry Boudreaux, Illinois, United States (private address)
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 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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