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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
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
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:
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P 2013 Jun
Mass (g):433.9
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
   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)
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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     This is 1 of 9746 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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