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Northwest Africa 6290
Basic information Name: Northwest Africa 6290
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6290
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 1050 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 443 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 19 Sep 2011
Writeuphelp
Writeup from MB 100:

Northwest Africa 6290 (NWA 6290)

(Northwest Africa)

Purchased: 2010 Jun

Classification: HED achondrite (Diogenite)

Petrography: (A. Irving and S. Kuehner, UWS): Fresh polymict breccia composed predominantly of distinctly "milky" orthopyroxene fragments and some polycrystalline clasts, with sparse pigeonite, olivine (bimodal in composition), calcic plagioclase, chromite, troilite and Ni-poor metal. Most of the orthopyroxene is charged with microscopic inclusions of chromite and troilite, which render it pale tan-colored in thin section.

Geochemistry: Orthopyroxene (Fs22.9-24.9Wo1.0; FeO/MnO = 30.8-31.0), pigeonite (Fs28.1-29.1Wo13.4-7.0; FeO/MnO = 22/6-26.0), magnesian olivine (Fa12.9-13.1; FeO/MnO = 40.9-48.5), ferroan olivine (Fa31.0; FeO/MnO = 44.2).

Data from:
  MB100
  Table 1
  Line 1330:
Origin or pseudonym:Northwest Africa
Place of purchase:Agadir
Date:P 2010 Jun
Mass (g):1050
Pieces:10
Class:Diogenite
Weathering grade:low
Fayalite (mol%):12.9-13.1; 31.0
Ferrosilite (mol%):22.9-24.9
Wollastonite (mol%):1.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:UWS
Main mass:J. Higgins
Comments:JH10-17; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Grünemeyer   
bphd      
METEORITICON      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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