MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 17 May 2024
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 8261
Basic information Name: Northwest Africa 8261
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8261
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 559 g
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 414 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 May 2014
Writeup from MB 103:

Northwest Africa 8261 (NWA 8261)

(Northwest Africa)

Purchased: 2014 Jan

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Kuntz in January 2014 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Polymict breccia composed predominantly of crystalline debris related to sparse lithic clasts of gabbroic eucrite, along with rare clasts of much finer grained, intersertal-textured eucrite, autolithic breccia clasts (i.e., breccia within breccia), and rare fragments of diogenitic orthopyroxene. Gabbroic eucrite clasts consist of exsolved pigeonite and polycrystalline calcic plagioclase with accessory silica polymorph, ilmenite, chromite, troilite and barite. Isolated grains of olivine, more ferroan augite, and ferroan pigeonite are also present.

Geochemistry: Diogenitic orthopyroxene (Fs23.9Wo2.3, FeO/MnO = 27), host orthopyroxene (Fs60.2Wo3.2, FeO/MnO = 32), clinopyroxene exsolution lamellae (Fs28.9Wo41.4, FeO/MnO = 29), olivine (Fa54.0, FeO/MnO = 45), ferroan augite (Fs35.0Wo40.0, FeO/MnO = 29), ferroan pigeonite (Fs62.0Wo24.2, FeO/MnO = 30).

Classification: Eucrite, polymict breccia.

Specimens: 20.9 g including a polished thin section at UWB. The remainder is held by Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2014 Jan
Mass (g):559
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):54
Ferrosilite (mol%):23.9; 60.2; 28.9
Wollastonite (mol%):2.3; 3.2; 41.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.9
Type spec location:UWB
Main mass:F. Kuntz
Comments:K202; 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)
Kuntz: Fabien Kuntz, France; Website (private address)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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)
chen pan   
Mike Markowitz   
Piotr gural100   
Ryan Upchurch   
Stefano De Fazi   

     This is 1 of 9729 approved meteorites from (Northwest Africa) (plus 1859 unapproved names)

Direct link to this page