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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 263 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 Photo added 19 Apr 2022
Rene Schmit Photo added 19 Apr 2022
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is the only approved meteorite from (Northwest Africa), Algeria
     This is 1 of 1210 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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