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Northwest Africa 15239
Basic information Name: Northwest Africa 15239
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15239
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 1205 g
Classification
  history:
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
Writeuphelp
Writeup from MB 111:

Northwest Africa 15239 (NWA 15239)

(Northwest Africa)

Purchased: 2019 Aug

Classification: Achondrite (brachinite-like)

History: Purchased by Ziyao Wang in August 2019 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Protogranular aggregate (mean grainsize ~450 µm) of olivine, orthopyroxene and augite with accessory low-Ti chromite, pentlandite, troilite and chlorapatite. No fresh metal or plagioclase were observed. Mafic silicates exhibit very little compositional variation. Secondary Fe oxides are present around primary sulfide grains and along grain boundaries.

Geochemistry: Olivine (Fa29.4-30.5, FeO/MnO = 57-62, N = 4), orthopyroxene (Fs24.3-24.6Wo2.0-2.2, FeO/MnO = 36-41, N = 4), augite (Fs9.6-9.8Wo44.1-44.2, FeO/MnO = 26-29, N = 4).

Classification: Achondrite (brachinite-like). Likely paired with NWA 5400 and other specimens.

Specimens: 23.8 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2019 Aug
Mass (g):1205
Pieces:1
Class:Achondrite (brachinite-like)
Shock stage:low
Weathering grade:low
Fayalite (mol%):29.4-30.5
Ferrosilite (mol%):24.3-24.6; 9.6-9.8
Wollastonite (mol%):2.0-2.2; 44.1-44.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):23.8
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-93; 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)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
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 8746 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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