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Northwest Africa 6258
Basic information Name: Northwest Africa 6258
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6258
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 1088 g
Meteoritical Bulletin:  MB 102  (2013)  EL-melt rock
Recommended:  EL-melt rock    [explanation]

This is 1 of 26 approved meteorites classified as EL-melt rock.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites
Comments: Approved 6 Sep 2013
Writeup from MB 102:

Northwest Africa 6258 (NWA 6258)

(Northwest Africa)

Purchased: 2009-May

Classification: Enstatite chondrite (EL melt rock)

History: Purchased by Marcin Cimała in May 2009 from a Moroccan dealer.

Physical characteristics: A group of dark brown, dense stones comprising two larger pieces and many small fragments (total 1088 g). Fresh interiors are black with abundant, anastomosing metal and sulfide grains.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of clasts rich in irregular, elongated grains of metal and sulfides with associated Fe-poor silicates. Minerals are forsterite, enstatite, diopside, albite, Si-poor kamacite, troilite, taenite, schreibersite, and daubreelite.

Geochemistry: Forsterite (Fa0.9), enstatite (Fs1.5-1.8Wo1.4-1.2), diopside (Fs0.7-2.3Wo45.9-44.6).

Classification: EL-melt breccia.

Specimens: A total of 36 g of type material and one polished thin section are on deposit at UWB. The remaining material is held jointly by Mr. M. Cimała and Mr. T. Jakubowski.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2009-May
Mass (g):1088
Class:EL-melt rock
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):0.9
Ferrosilite (mol%):1.5-1.8; 0.7-2.3
Wollastonite (mol%):1.4-1.2; 45.9-44.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):36
Type spec location:UWB
Main mass:M. Cimala & T. Jakubowski
Comments:MC067; submitted by A. Irving
   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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Marcin Cimala         
Woreczko Jan & Wadi   

     This is 1 of 9772 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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