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Northwest Africa 13241
Basic information Name: Northwest Africa 13241
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13241
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 123.9 g
Classification
  history:
Recommended:  Lodranite    [explanation]

This is 1 of 82 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 28 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13241 (NWA 13241)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Primitive achondrite (Lodranite)

History: Purchased by Darryl Pitt in November 2019 from a dealer in Smara, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Protogranular aggregate (mean grainsize 0.9 mm) composed of olivine, orthopyroxene and clinopyroxene together with accessory kamacite (partially altered to iron hydoxides), troilite and schreibersite. Silicates are stained by terrestrial iron hydroxides. Minor secondary Ca sulfate is present as well as some cross-cutting veinlets of goethite.

Geochemistry: Olivine (6.4-6.5, FeO/MnO = 13-15, N = 5), orthopyroxene (Fs2.3-4.1Wo1.3-2.4, FeO/MnO = 3-5, N = 5), clinopyroxene (Fs1.9-2.6Wo46.4-43.5, FeO/MnO = 5, N = 3).

Classification: Lodranite.

Specimens: 20.2 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Smara
Date:P 2019 Nov
Mass (g):123.9
Pieces:1
Class:Lodranite
Shock stage:low
Weathering grade:low
Fayalite (mol%):6.4-6.5
Ferrosilite (mol%):2.3-4.1; 1.9-2.6
Wollastonite (mol%):1.3-2.4; 46.4-43.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 489; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7374 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

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