Meteoritical Bulletin: Entry for Northwest Africa 5267

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Northwest Africa 5267

Basic information

Name: Northwest Africa 5267
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5267
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 95 g

Classification
history:

Recommended:

Eucrite-br [explanation]

This is 1 of 209 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 19 Feb 2022

Writeup

Writeup from MB 111:

Northwest Africa 5267 (NWA 5267)

(Northwest Africa)

Purchased: 2006

Classification: HED achondrite (Eucrite, brecciated)

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

Physical characteristics: Five dark grayish fragments without fusion crust.

Petrography: Achondritic breccia composed of up to 3 mm coarse-grained gabbroic and basaltic clasts set into a fine-grained clastic matrix with domains of recrystallized mesostasis. Main minerals are exsolved proxene and often lath-shaped calcic plagioclase up to 700 µm in size. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron detected.

Geochemistry: low-Ca pyroxene host to exsolution lamellae: Fs_55.8±0.3Wo_2.5±0.1(Fs_55.3-56.2Wo_2.4-2.7, n=7, FeO/MnO=31-33); augite exsolution lamellae: Fs_25.6±0.2Wo_41.8±0.2(Fs_25.3-25.8Wo_41.6-42.2, n=7, FeO/MnO=27-31); calcic plagioclase: An_88.0±1.4(An_86.0-90.1, n=7)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2006
Mass (g):	95
Pieces:	5
Class:	Eucrite-br
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	55.8; 25.6
Wollastonite (mol%):	2.5; 41.8
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.4
Type spec location:	MNB
Main mass:	Christian Anger
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Anger: Christian Anger, Korngasse 6, 2405 Bad Deutsch-Altenburg, Austria; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Gerald Armstrong	Photo added 19 Apr 2022

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8580 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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