Meteoritical Bulletin: Entry for Northwest Africa 4246

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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: 3.5 g

Classification
history:

Meteoritical Bulletin:	MB 91	(2007)	Ureilite
Recommended:			Ureilite [explanation]

This is 1 of 604 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 1 Sep 2006

Writeup

help

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 Fa_22.0; range: Fa_21.5–22.3; n = 5), (rim Fa_15.9; range: Fa_13.3–19.7; n = 3), pigeonite (Fs_18.3En_74.0Wo_7.7; 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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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