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Northwest Africa 13278
Basic information Name: Northwest Africa 13278
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13278
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 564 g
Classification
  history:
Recommended:  Aubrite    [explanation]

This is 1 of 65 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 2 May 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13278 (NWA 13278)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Enstatite achondrite (Aubrite)

History: Purchased by Zaid Sbitti in November 2019 from a dealer in Ouargla, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of large clasts of enstatite (with diopside exsolution lamellae) and subordinate forsterite set within a finer grained matrix composed of enstatite, sodic plagioclase, Cr-troilite, niningerite and Si-bearing kamacite.

Geochemistry: Enstatite (Fs0.0-0.1Wo0.9-1.1, N = 2), diopside (Fs0.0-0.1Wo44.4-45.8, N = 2), forsterite (Fa0.0±0.0, N = 2), plagioclase (Ab86.1An0.5Or13.4), kamacite (Ni = 3.0 wt.%, Si = 3.1 wt.%), troilite (Cr = 2.8 wt.%).

Classification: Aubrite.

Specimens: 24.7 g in the form of a polished endcut at UWB; remainder held by Mr. L. Ouabicha and Mr. Z. Sbitti.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Ouargla, Algeria
Date:P 2019 Nov
Mass (g):564
Pieces:1
Class:Aubrite
Shock stage:low
Weathering grade:low
Fayalite (mol%):0.0±0.0
Ferrosilite (mol%):0.0-0.1; 0.0-0.1
Wollastonite (mol%):0.9-1.1; 44.4-45.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):24.7
Type spec location:UWB
Main mass:L. Ouabicha/Z. Sbitti
Comments:Work name ZS20-CH1; 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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Marcin Cimala         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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