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Northwest Africa 8313
Basic information Name: Northwest Africa 8313
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8313
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 26.6 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 25 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8313 (NWA 8313)

(Northwest Africa)

Purchased: 2014 Jan

Classification: HED achondrite (Diogenite)

History: Purchased by GHupé in January 2014 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Matrix-poor breccia composed primarily of orthopyroxene with accessory olivine, altered Ni-free metal, chromite and troilite.

Geochemistry: Orthopyroxene (Fs25.3-26.1Wo2.8-3.6), FeO/MnO =28), olivine (Fa22.8-24.1, FeO/MnO = 34-37).

Classification: Diogenite. The orthopyroxene has a composition typical for diogenites, but the olivine is not in equilibrium with it and its FeO/MnO ratio is much lower than for olivine in diogenites, so it must be an exotic component.

Specimens: 5.33 g including one polished thin section at UWB. The remaining material is held by GHupé.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2014 Jan
Mass (g):26.6
Pieces:2
Class:Diogenite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):22.8-24.1
Ferrosilite (mol%):25.3-26.1
Wollastonite (mol%):2.8-3.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):5.33
Type spec location:UWB
Main mass:G. Hupe
Comments:GH-459; 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)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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