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Northwest Africa 8409
Basic information Name: Northwest Africa 8409
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8409
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 434 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Achondrite-ung
Recommended:  Achondrite-ung    [explanation]

This is 1 of 154 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 26 May 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 8409 (NWA 8409)

(Northwest Africa)

Purchased: 2013 Jun

Classification: Ungrouped achondrite

History: Purchased by Marc Jost in June 2013 from several Moroccan dealers at the Ensisheim Show.

Physical characteristics: A group of essentially identical dark green, uncrusted stones ranging in size from 99 g to <1 g. Distinctive green clinopyroxene and gray, frosty plagioclase are evident.

Petrography: (A. Irving and S. Kuehner, UWS) Cumulate igneous texture. Composed mainly of calcic plagioclase, diopside and forsterite with accessory Cr-bearing troilite and kamacite. Lobate forsterite grains are commonly associated with elongate pores.

Geochemistry: Olivine (Fa4.5-4.6, FeO/MnO = 36-41, N = 3), clinopyroxene (Fs1.8-2.2Wo44.3-43.8, FeO/MnO = 12-15, N = 3).

Classification: Achondrite (ungrouped). Paired with NWA 7325, NWA 8014 and other stones from the Bir Abbas site.

Specimens: 20.4 g including one polished piece at UWB; remainder held by SJS.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P 2013 Jun
Mass (g):433.9
Pieces:many
Class:Achondrite-ung
Shock stage:high
Weathering grade:low
Fayalite (mol%):4.5-4.6
Ferrosilite (mol%):1.8-2.2
Wollastonite (mol%):44.3-43.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.4
Type spec location:UWB
Main mass:Space Jewels Switzerland
Comments:SJS 13004; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou      
Andreas Möller   
Cute child   
Denis gourgues                           
ironee      
Russ Opdahl               
Solar Anamnesis      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9746 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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