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Northwest Africa 4246
Basic information Name: Northwest Africa 4246
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4246
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 3.5 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 594 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 1 Sep 2006
Writeuphelp
Writeup from MB 91:

Northwest Africa 4246

Northwest Africa

Find: 2004

Achondrite (ureilite)

History: A tiny piece was purchased at the Munich Mineral Fair, Germany, from a Moroccan dealer in 2004. An anonymous finder recovered the meteorites from the western part of the Sahara.

Physical characteristics: A 4 g, angular, dark brown fragment with a granular sand blasted surface.

Petrography: (J. Schlüter, Hamb) Coarse-grained granoblastic ureilite texture with olivine, pigeonite, and some plagioclase. Reduced olivine rims show tiny metal inclusions. Intergranular graphite laths observed.

Mineral compositions and geochemistry: Olivine (core Fa22.0; range: Fa21.5–22.3; n = 5), (rim Fa15.9; range: Fa13.3–19.7; n = 3), pigeonite (Fs18.3En74.0Wo7.7; Cr2O3 = 0.96 wt%; n = 2) Intergranular metal with Ni = 4.17 wt%.

Classification: Achondrite (ureilite); minimal weathering.

Type specimen: A total of 1.3 g is on deposit at Hamb. Wuthenau holds the main mass.

Data from:
  MB91
  Table 2
  Line 245:
Place of purchase:Munich, Germany
Date:2003
Mass (g):4
Pieces:1
Class:Ure
Shock stage:S3
Weathering grade:moderate
Fayalite (mol%):22
Ferrosilite (mol%):18.3
Classifier:J. Schlüter, Ham
Type spec mass (g):1.3
Type spec location:Ham
Main mass:Kasper von Wuthenau, Techin
Institutions
   and collections
Hamb: Mineralogisches Museum, Universität of Hamburg, Grindelallee 48, D-20146 Hamburg, Germany; Website (institutional address; updated 22 Feb 2013)
Ham: Mineralogisches Museum, Universität of Hamburg, Grindelallee 48, D-20146 Hamburg, Germany; Website (institutional address; updated 22 Feb 2013)
Wuthenau: No contact information provided. (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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