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Northwest Africa 5742
Basic information Name: Northwest Africa 5742
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5742
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 180 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 424 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 26 Oct 2011
Writeuphelp
Writeup from MB 100:

Northwest Africa 5742 (NWA 5742)

(Northwest Africa)

Found: Feb 2009

Classification: HED achondrite (Diogenite)

Petrography: (A. Irving and S. Kuehner, UWS): Fragmental breccia consisting of abundant angular mineral grains (mostly orthopyroxene and plagioclase) and a few lithic eucrite clasts in a finer grained matrix. Orthopyroxene is relatively abundant and exhibits more iron-rich rims against the matrix. Less abundant angular grains of silica also exhibit orthopyroxene reaction rims. Other phases are very calcic plagioclase, exsolved pigeonite (Fs24.5Wo7.0, FeO/MnO = 27.2), chromite, ilmenite and troilite.

Geochemistry: Orthopyroxene, Fs24.5-33.2Wo2.4-3.1, FeO/MnO=30.7-33.7; exsolved pigeonite, Fs24.5Wo7.0, FeO/MnO=27.2.

Data from:
  MB100
  Table 1
  Line 1280:
Place of purchase:Tucson
Date:Feb 2009
Mass (g):180
Pieces:1
Class:Diogenite
Ferrosilite (mol%):24.5-34.4
Wollastonite (mol%):2.3-3.1; 7.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.0
Type spec location:UWS
Main mass:AHupe
Comments:Submitted by 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)
Michael S. Scherman   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6846 approved meteorites from (Northwest Africa) (plus 2038 unapproved names)

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