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Northwest Africa 10855
Basic information Name: Northwest Africa 10855
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10855
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 539 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 426 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 26 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10855 (NWA 10855)

(Northwest Africa)

Purchased: 2016 May

Classification: HED achondrite (Diogenite)

History: Purchased by Beat Booz in May 2016 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of orthopyroxene-rich clasts and related crystalline debris. Orthopyroxene exhibits undulose extinction. Accessory minerals include chromite, clinopyroxene, troilite and stained Fe metal.

Geochemistry: Orthopyroxene (Fs26.4-27.3Wo3.1-3.9, FeO/MnO = 27-28, N = 3), clinopyroxene (Fs9.4-12.0Wo45.9-44.7, FeO/MnO = 19-24, N = 2)

Classification: Diogenite (breccia).

Specimens: 24.23 g including one polished thin section at UWB; remainder with Mr. B. Booz.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016 May
Mass (g):539
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):26.4-27.3; 9.4-12.0
Wollastonite (mol%):3.1-3.9; 45.9-44.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24.23
Type spec location:UWB
Main mass:B. Booz
Comments:BB-52; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
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 uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Beat Booz   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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