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Northwest Africa 13239
Basic information Name: Northwest Africa 13239
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13239
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 287 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 529 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 28 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13239 (NWA 13239)

(Northwest Africa)

Purchased: 2019 Aug

Classification: Ureilite

History: Purchased by Mbark Arjdal in August 2019 from a dealer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Aggregate (mean grainsize 1.2 mm) of olivine with thick opaque, reduced magnesian rims (~75 vol.%), pigeonite (~25 vol.%) and accessory bladed grains of graphite.

Geochemistry: Olivine (cores Fa21.3-21.7, N = 3; rims Fa3.0-3.2, N = 2), pigeonite (Fs10.5-18.1Wo6.5-14.0, N = 4).

Classification: Ureilite.

Specimens: 25.0 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2019 Aug
Mass (g):287
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):21.3-21.7
Ferrosilite (mol%):10.5-18.1
Wollastonite (mol%):6.5-14.0
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):25.0
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 86; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7269 approved meteorites from (Northwest Africa) (plus 1987 unapproved names)

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