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Northwest Africa 5234
Basic information Name: Northwest Africa 5234
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5234
Observed fall: No
Year found: 2008
Country: Algeria
Mass:help 399 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Apr 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 5234 (NWA 5234)

(Northwest Africa), Algeria

Purchased: Feb 2008

Classification: HED achondrite (Eucrite, monomict)

History: Found in Algeria and purchased in February 2008 by Adam Hupé from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: A single, very fresh, 399 g stone, partially covered with fusion crust. The interior is crosscut by numerous thin, dark shock veins.

Petrography: (A. Irving and S. Kuehner, UWS) Monomict basaltic eucrite breccia composed of exsolved pigeonite, discrete grains of orthopyroxene and augite, calcic plagioclase, silica polymorph (some intergrown with plagioclase and augite), Ti-bearing chromite, troilite and rare zircon. The veins consist of glass plus very fine clasts and microlites of mostly plagioclase and pyroxene.

Geochemistry: Orthopyroxene host (Fs61.4-61.5Wo2.0-1.9, Fe/Mn=30.4), plagioclase (An89.4Or0.6). Oxygen Isotopes (D. Rumble, CIW): analyses of acid-washed whole sample material by laser fluorination gave the following results: δ18O = 3.694; δ17O = 1.727; Δ17O = -0.216 per mil.

Classification: Achondrite (eucrite, monomict). This specimen is unusual because of the abundance of shock melt veins.

Specimens: 20.1 g and one polished slice are on deposit at UWS. The main mass is held by AHupé.

Data from:
  MB100
  Table 1
  Line 1209:
State/Prov/County:(Northwest Africa)
Place of purchase:Tucson
Date:P Feb 2008
Mass (g):399
Pieces:1
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):61.4-61.5
Wollastonite (mol%):2.0-1.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWS
Main mass:AHupé
Comments:Submitted by A. Irving
Plots: O isotopes:  
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)
AHupé: Adam C. Hupé, 2807 China Cove, Laughlin, NV 89029, United States; Website (private address; updated 29 Jun 2013)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Grünemeyer   
Rene Schmit   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is the only approved meteorite from (Northwest Africa), Algeria
     This is 1 of 970 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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