Meteoritical Bulletin: Entry for Northwest Africa 5478

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Northwest Africa 5478

Basic information

Name: Northwest Africa 5478
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5478
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 30.3 g

Classification
history:

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

This is 1 of 395 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 26 Sep 2017

Writeup

Writeup from MB 106:

Northwest Africa 5478 (NWA 5478)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, polymict)

History: Three individuals were bought in 2008 from a Moroccan meteorite dealer in Erfoud, Morocco.

Physical characteristics: Three dark grayish individuals partly covered by fusion crust.

Petrography: The meteorite is a coarse-grained breccia composed of basaltic, melt and mineral clasts set into a more fine-grained matrix. Exsolved pyroxene and calcic plagioclase are the dominant mineral phases. Shock melt is abundant. Minor phases include silica, ilmenite, troilite, and chromit. No metallic iron has been found.

Geochemistry: low-Ca pyroxene: Fs_59.7±1.1Wo_3.4±1.2(Fs_57.6-61.6Wo_2.0-6.6, n=15, FeO/MnO=31-36); Ca-pyroxene: Fs_28.4±1.9Wo_42.2±1.4(Fs_26.4-32.5Wo_39.2-43.9, n=15, FeO/MnO=32-36); calcic plagioclase: An_89.3±0.5(An_88.6-90.3, n=15)

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2008
Mass (g):	30.3
Pieces:	3
Class:	Eucrite-pmict
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	59.7; 28.4
Wollastonite (mol%):	3.4; 42.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	7
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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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Auricular
Ryan Upchurch

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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