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Northwest Africa 11020
Basic information Name: Northwest Africa 11020
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11020
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 286 g
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 283 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Dec 2016
Writeup from MB 105:

Northwest Africa 11020 (NWA 11020)

(Northwest Africa)

Purchased: 2016 Jun

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Fabien Kuntz in June 2016 from a dealer in Tan Tan, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of basaltic eucrite clasts in a sparse, dark matrix containing minor barite. The mostly rounded clasts consist of exsolved pigeonite (pale orange-brown in thin section) and polycrystalline calcic plagioclase with accessory silica polymorph, fayalitic olivine, Ti-chromite, ilmenite (containing rare inclusions of baddeleyite) and minor Fe-Mg-bearing merrillite.

Geochemistry: Orthopyroxene host (Fs59.2Wo3.9, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs27.4Wo42.9, FeO/MnO = 29), clinopyroxene host (Fs29.1Wo42.1, FeO/MnO = 30), orthopyroxene exsolution lamella (Fs62.9Wo2.3, FeO/MnO = 30), fayalitic olivine (Fa83.9-86.0, FeO/MnO = 26-32), plagioclase (An85.0-90.0Or1.0-0.3, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 2.96.

Classification: Eucrite (monomict breccia, shocked).

Specimens: 24.54 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Tan Tan
Date:P 2016 Jun
Mass (g):285.9
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):59.2-62.9; 27.4-29.1
Wollastonite (mol%):3.9-2.3; 42.9-42.1
Magnetic suscept.:2.96
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24.54
Type spec location:PSF
Main mass:F. Kuntz
Comments:K305; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz: Fabien Kuntz, France; Website (private address)
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 uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Ryan Upchurch   

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

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