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Northwest Africa 8057
Basic information Name: Northwest Africa 8057
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8057
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 100.8 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 465 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 14 Feb 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8057 (NWA 8057)

(Northwest Africa)

Purchased: 2013 Sep

Classification: HED achondrite (Diogenite)

History: Purchased in September 2013 by Gary Fujihara from a dealer in Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh fragmental breccia consisting of closely-packed angular mineral clasts with very little matrix. The predominant mineral is orthopyroxene accompanied by ~10 vol.% olivine and accessory Cr-rich chromite, anorthite, Ni-free metal, silica polymorph, and sparse clasts composed of orthopyroxene+chromite symplectitic intergrowths.

Geochemistry: Orthopyroxene (Fs19.6-21.3Wo1.7-2.4; FeO/MnO = 27-29), olivine (Fa24.6-25.4; FeO/MnO = 46).

Classification: Diogenite breccia.

Specimens: 20.1 g including a polished thin section at UWB. The remainder is held by Mr. G. Fujihara.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Sep
Mass (g):100.8
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:low
Fayalite (mol%):24.6-25.4
Ferrosilite (mol%):19.6-21.3
Wollastonite (mol%):1.7-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:G. Fujihara
Comments:GF13-7; 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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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