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Northwest Africa 3212
Basic information Name: Northwest Africa 3212
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3212
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 176.6 g
Meteoritical Bulletin:  MB 94  (2008)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 8 Sep 2008
Writeup from MB 94:

Northwest Africa 3212

Northwest Africa

Find: 2005

Achondrite (eucrite)

History: A single stone of 176.6 g was found purchased in 2005 in Erfoud by M. Chinellato.

Physical characteristics: The sample displays no fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, MSP) A polymict breccia consisting of basaltic and mineral clasts set into a fine-grained matrix of exsolved pyroxene, clinopyroxene and plagioclase. The large clasts are predominantly plagioclase and exsolved pyroxene, with minor clinopyroxene. Silica and spinel ilmenite, and Al-Ti-chromite are commonly minor phases. Exsolution lamellae in pyroxene are very fine (1–2 μm width).

Geochemistry: Plagioclase An89.4; pyroxene ranges Fs35.6–54.1, En37.4–43.9, Wo2.0–29.2. Oxygen isotopes (I. A. Franchi, R. Greenwood, OU) δ17O = 1.74‰, δ18O = 3.84‰, Δ17O = -0.26‰.

Classification: Achondrite (eucrite) with moderate degree of shock and low degree of weathering. Possibly paired with NWA 3211.

Type specimens: A total of 20 g specimen and one thin section are on deposit at MSP, Prato. MChin holds the main mass.  

Data from:
  Table 2
  Line 5:
State/Prov/County:Northwest Africa
Mass (g):176.6
Ferrosilite (mol%):35.6-54.1
Wollastonite (mol%):2-29.2
Classifier:V. Moggi Cecchi, G. Pratesi, Museo di Scienze Planetarie
Type spec mass (g):20
Type spec location:MSP
Main mass:MChin
Comments:δ17O = 1.74‰, δ18O = 3.84‰, Δ17O = -0.26‰.
Plots: O isotopes:  
   and collections
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
MChin: Matteo Chinellato, Via Triestina, 126/A-30030 Tessera, Venezia, Italy; Website (private address)
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Photos from the Encyclopedia of Meteorites:
Matteo Chinellato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)

     This is 1 of 9689 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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