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Northwest Africa 13247
Basic information Name: Northwest Africa 13247
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13247
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 314 g
Classification
  history:
Recommended:  Winonaite    [explanation]

This is 1 of 42 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 28 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13247 (NWA 13247)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Primitive achondrite (Winonaite)

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 predominantly of forsteritic olivine and polysynthetically twinned enstatitic orthopyroxene together with accessory kamacite, Cr-Mn-bearing troilite, schreibersite and graphite.

Geochemistry: Olivine (Fa0.4-2.0, FeO/MnO = 2-8, N = 9), orthopyroxene (Fs3.3-5.0Wo0.7-1.9, FeO/MnO = 1-3, N = 7).

Classification: Winonaite.

Specimens: 22.4 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):314.1
Pieces:1
Class:Winonaite
Shock stage:low
Weathering grade:low
Fayalite (mol%):0.4-2.0
Ferrosilite (mol%):3.3-5.0
Wollastonite (mol%):0.7-1.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):22.4
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 488; 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 7269 approved meteorites from (Northwest Africa) (plus 1987 unapproved names)

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