Meteoritical Bulletin: Entry for Northwest Africa 5921

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Northwest Africa 5921

Basic information

Name: Northwest Africa 5921
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5921
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 98 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Ureilite
Recommended:			Ureilite [explanation]

This is 1 of 676 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 26 Sep 2017

Writeup

Writeup from MB 106:

Northwest Africa 5921 (NWA 5921)

(Northwest Africa)

Purchased: 2009

Classification: Ureilite

History: The meteorite was bought in 2009 from a Moroccan meteorite dealer in Erfoud, Morocco.

Physical characteristics: Brownish individual lacking any fusion crust.

Petrography: The meteorite shows a cumulate texture of coarse-grained up to 2 mm sized Cr-rich olivine and orthopyroxene crystals. It contains flaky graphite; olivine displays characteristic reduced rims.

Geochemistry: reduced rims in olivine: Fa_5.4-9.9; Cr₂O₃ in ol: ~0.7 wt%

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2009
Mass (g):	98
Pieces:	1
Class:	Ureilite
Shock stage:	moderate
Weathering grade:	low
Fayalite (mol%):	20.6±0.2 (n=20)
Ferrosilite (mol%):	18.1±0.1 (n=14)
Wollastonite (mol%):	4.9±0.1 (n=14)
Classifier:	A. Greshake, MNB
Type spec mass (g):	21.6
Type spec location:	MNB
Main mass:	Fabien Kuntz
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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