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Northwest Africa 7464
Basic information Name: Northwest Africa 7464
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7464
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 2.26 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 411 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 3 Jun 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7464 (NWA 7464)

(Northwest Africa)

Purchased: 2012 Jul

Classification: HED achondrite (Diogenite)

History: Purchased from a Moroccan dealer by Gary Fujihara, Tomek Jakubowski and Adam Bates in July 2012.

Physical characteristics: Among the various stones constituting this find, most are extremely fresh, but some have iron oxide staining (presumably as a result of variable distribution and degree of weathering of accessory iron metal).

Petrography: (A. Irving and S. Kuehner, UWS) Texturally, the material consists of larger crystal fragments in a matrix of finer, angular grains of the same minerals – this could be termed a matrix-poor breccia, cataclastic or mortar texture. The predominant mineral is orthopyroxene accompanied by accessory olivine, clinopyroxene, anorthite, chromite, Ni-poor metal (more stained in some stones) and troilite.

Geochemistry: Orthopyroxene (Fs24.7-25.5Wo3.7-3.4; FeO/MnO = 27-31), olivine (Fa25.1; Fa28.3; FeO/MnO = 48-50), clinopyroxene (Fs10.4Wo43.4; FeO/MnO = 22).

Classification: Diogenite

Specimens: 28.3 g of sample and one polished thin section are on deposit at UWB. The remaining material is held jointly by Gary Fujihara, Tomasz Jakubowski and Adam Bates.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012 Jul
Mass (g):2263
Pieces:81
Class:Diogenite
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):25.1-28.3
Ferrosilite (mol%):24.7-25.5; 10.4
Wollastonite (mol%):3.7-3.4; 43.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):28.3
Type spec location:UWB
Main mass:G. Fujihara, T. Jakubowski, A. Bates
Comments:GF12-7; 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. 102, MAPS 50, 1662, September 2015
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Denis gourgues   
Jean-Michel Masson   
Volker Heinrich   
Public domain photographs:
Gary Fujihara   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6325 approved meteorites from (Northwest Africa) (plus 2026 unapproved names)

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