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Northwest Africa 5885
Basic information Name: Northwest Africa 5885
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5885
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 98 g
Meteoritical Bulletin:  MB 106  (2018)  Aubrite
Recommended:  Aubrite    [explanation]

This is 1 of 83 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 31 Jul 2017
Writeup from MB 106:

Northwest Africa 5885 (NWA 5885)

(Northwest Africa)

Purchased: 2009

Classification: Enstatite achondrite (Aubrite)

History: The meteorite was bought in 2009 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: A single, brownish individual without fusion crust was purchased.

Petrography: The meteorite displays a medium- to coarse-grained texture dominantly composed of up to 2 mm sized enstatite crystals. Often, adjoining grains show triple junctions. Less abundant are albitic feldspar and kamacite. Perryite is found as exsolution phase in the metal. The meteorite contains several weathering veins.

Geochemistry: Feldspar: An4.1Ab91.7Or4.2 (N=2); metal contains 3.2-3.8 wt Ni and about 3.2 wt% Si; oxygen isotopes (N. Assayag, P. Cartigny, and D. Rumble, IPGP): δ18O=5.335, 5.585; δ17O=2.849, 2.875; Δ17O= 0.057, -0.048 (all per mil).

Classification: Aubrite. Pairing with NWA 6675 seems likely.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2009
Mass (g):98
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):0.5±0.2 (0.1-0.9, n=17)
Wollastonite (mol%):0.3±0.04 (0.3-0.4, n=17)
Classifier:A. Greshake, MNB
Type spec mass (g):20.2
Type spec location:MNB
Main mass:Fabien Kuntz 
Comments:Submitted by Ansgar Greshake
Plots: O isotopes:  
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
IPGP: Institute de Physique du Globe de Paris, 1 rue Jussieu, 75252 Paris, Cedex 05, France (institutional address; updated 3 Nov 2014)
Kuntz: Fabien Kuntz, France; Website (private address)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Christophe PICQ   
Mike Markowitz   
Ryan Upchurch   

     This is 1 of 9765 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)

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