Meteoritical Bulletin: Entry for Northwest Africa 5669

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Northwest Africa 5669

Basic information

Name: Northwest Africa 5669
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5669
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 232 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 17 Oct 2021

Writeup

Writeup from MB 110:

Northwest Africa 5669 (NWA 5669)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: Fine-grained brecciated basalt showing a recrystallized, granoblastic texture with sparse up to 3 mm sized coarse-grained basaltic clasts. Predominant minerals are exsolved pyroxene and calcic plagioclase 10-30 µm in size. Minor phases are silica, chromite, ilmenite, and FeS. No metallic iron has been detected. The meteorite contains some shock melt veins.

Geochemistry: low-Ca pyroxene: Fs_65.3±0.5Wo_4.6±0.7(Fs_64.6-66.4Wo_3.4-5.5, FeO/MnO=29-32, n=13); Ca-pyroxene: Fs_32.8±0.7Wo_41.5±0.6(Fs_31.7-33.7Wo_40.4-42.5, FeO/MnO=32-35, n=11); calcic plagioclase: An_89.3±0.6(An_88.0-90.2, n=13)

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2008
Mass (g):	232
Pieces:	1
Class:	Eucrite
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	65.3; 32.8
Wollastonite (mol%):	4.6; 41.5
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.2
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., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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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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