Meteoritical Bulletin: Entry for Northwest Africa 5473

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Northwest Africa 5473

Basic information

Name: Northwest Africa 5473
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5473
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 45.9 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 26 Sep 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 5473 (NWA 5473)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was bought in 2008 from a Moroccan meteorite dealer in Erfoud, Morocco.

Physical characteristics: Small grayish individual lacking any fusion crust.

Petrography: The meteorite is a fragmental breccia composed of rare basaltic, impact melt, and mineral clasts with different grain sizes set into a clastic matrix. Clasts and matrix are dominantly composed of exsolved pyroxene and plagioclase up to 600 μm in size. Several matrix pyroxenes display magmatic zoning. Minor phases include chromite, ilmenite, pyrrhotite, silica, barite, zircon, and metallic iron. The meteorite contains some shock melt veins.

Geochemistry: low-Ca pyroxene: Fs_27.5±7Wo_2.5±0.5(Fs_21.8-49.7Wo_1.5-3.3, n=15, FeO/MnO=30-35); Ca-pyroxene: Fs_21.9±2.4Wo_43.3±0.8(Fs_18.6-25.1Wo_41.3-44.3, n=18, FeO/MnO=19-33); calcic plagioclase: An_90.3±1.1(An_88.7-92.0, n=12)

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2008
Mass (g):	45.9
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	high
Weathering grade:	moderate
Ferrosilite (mol%):	27.5; 21.9
Wollastonite (mol%):	2.5; 43.3
Classifier:	A. Greshake, MNB
Type spec mass (g):	9.2
Type spec location:	MNB
Main mass:	Stefan Ralew
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; 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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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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