Meteoritical Bulletin: Entry for Northwest Africa 12422

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Northwest Africa 12422

Basic information

Name: Northwest Africa 12422
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12422
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 42.8 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 9 Feb 2019

Writeup

Writeup from MB 108:

Northwest Africa 12422 (NWA 12422)

(Northwest Africa)

Find: 2018 Oct

Classification: Lunar meteorite (feldspathic breccia)

History: Found in October 2018 in the Assa-Zag region of Morocco and purchased by Craig Zlimen in November 2018 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fine grained assemblage of mineral clasts (including anorthite, orthopyroxene, augite, rare zoned olivine) in a partly vitreous ("swirly") and sparsely vesicular matrix containing kamacite, chromite and troilite.

Geochemistry: Anorthite (An_96.7-97.4Or_0.1, N = 2), orthopyroxene (Fs_24.6-26.6Wo_3.9-4.1, FeO/MnO = 54-58, N = 2), pigeonite (Fs_36.6Wo_9.7, FeO/MnO = 71), augite (Fs_15.3Wo_40.1, FeO/MnO = 38), olivine (core Fa_15.1, FeO/MnO = 96; rim Fa_24.7, FeO/MnO = 104).

Classification: Lunar (feldspathic regolith melt breccia).

Specimens: 9.5 g in the form of a polished endcut at UWB; remainder with Mr. C. Zlimen.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	2018 Oct
Mass (g):	42.8
Pieces:	2
Class:	Lunar (feldsp. breccia)
Shock stage:	moderate
Weathering grade:	low
Fayalite (mol%):	15.1-24.7
Ferrosilite (mol%):	24.6-26.6; 36.6; 15.3
Wollastonite (mol%):	3.9-4.1; 9.7; 40.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	9.5
Type spec location:	UWB
Main mass:	C. Zlimen
Comments:	Work name ZLI06; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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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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