MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 1 Oct 2022
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
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 23 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Marcin Cimala         
Photo added 19 Apr 2022
Piotr gural100 Photo added 19 Apr 2022
Woreczko Jan & Wadi   

     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

Direct link to this page