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:

Recommended:

Eucrite [explanation]

This is 1 of 554 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 Meteoritical Bulletin, no. 110, in preparation (2021)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8420 approved meteorites from (Northwest Africa) (plus 1900 unapproved names)

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