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Northwest Africa 15309
Basic information Name: Northwest Africa 15309
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15309
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 900 g
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 123 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15309 (NWA 15309)

(Northwest Africa)

Purchased: 2022 Jul

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by Ziyao Wang in July 2022 from a dealer in Laayoune, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen has a coarse grained gabbroic texture (grainsize up to ~3.5 mm), but with some much finer grained regions. The sample is composed predominantly of exsolved pigeonite and calcic plagioclase together with accessory silica polymorph, Ti-chromite, ilmenite, troilite, zircon, and minor secondary barite. Both pyroxene and plagioclase occur as polygranular clusters, and pyroxene consists of irregular, blebby, non-lamellar grains of exsolved augite within host orthopyroxene.

Geochemistry: Orthopyroxene (Fs62.3-64.1Wo1.7-2.3, FeO/MnO = 30-32, N = 4), augite (Fs26.5-29.1Wo44.5-41.8, FeO/MnO = 30-33, N = 4), plagioclase (An86.4-90.8Or0.4-0.2, N = 3).

Classification: Eucrite (unbrecciated, gabbroic).

Specimens: 23.6 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Laayoune
Date:P 2022 Jul
Mass (g):900
Pieces:1
Class:Eucrite-unbr
Ferrosilite (mol%):62.3-64.1; 26.5-29.1
Wollastonite (mol%):1.7-2.3; 44.5-41.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):23.6
Type spec location:UWB
Main mass:WangZ
Comments:Work name SMB-02; 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:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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