Meteoritical Bulletin: Entry for Northwest Africa 5406

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Northwest Africa 5406

Basic information

Name: Northwest Africa 5406
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5406
Observed fall: No
Year found: 2008
Country: Morocco
Mass: 281 g

Classification
history:

Meteoritical Bulletin:	MB 95	(2009)	Lunar feld. Breccia
Recommended:			Lunar [explanation]

This is 1 of 106 approved meteorites classified as Lunar. [show all]
Search for other: Lunar meteorites

Comments:

Approved 23 Dec 2008

Writeup

help

Writeup from MB 95:

Northwest Africa 5406

Morocco

Find: July 2008

Achondrite (lunar, feldspathic breccia)

History: Purchased by Greg Hupé in July 2008 from a dealer in Ouarzazate, Morocco, who reported that these stones were found in the same area as NWA 4936 near Siksou Mountain in southern Morocco.

Physical characteristics: Six, dark gray, mostly very fine-grained stones (total weight 281 g) with hackly fracture and lacking obvious fusion crust. The interior of each stone resembles devitrified glass with dispersed small white clasts.
Petrography: (A. Irving and S. Kuehner, UWS) All specimens are composed of small mineral clasts and sparse lithic clasts in a very fine-grained matrix (which has the texture of an impact melt with heterogeneous, “swirly” glass). Mineral clasts include anorthite, olivine, pigeonite, subcalcic augite, ilmenite, troilite, and irregular-shaped grains of kamacite.

Geochemistry: Pigeonite (Fs_34.7Wo_9.8, FeO/MnO = 59.9), augite (Fs_55.8Wo_26.4, FeO/MnO = 72.6), olivine (Fa_25.7–27.0, FeO/MnO = 85.3–120), plagioclase (An_96.2–97.2Or_0.0). Bulk composition (R. Korotev, WUSL): FeO 5.8 wt%, Th 2.0 ppm, Sc 9.1 ppm, Ni 520 ppm, Sm 6.3 ppm.

Classification: Achondrite (lunar, feldspathic breccia). These stones have essentially the same distinctive textures, mineral compositions and bulk composition as NWA 4936, and are almost certainly paired with the latter stones.

Specimens: A total of 20.0 g of is on deposit at UWS. The main masses are held by Mr. G. M. Hupé.

Data from:
  MB95
  Table 2
  Line 115:

Place of purchase:	Morocco
Date:	2008
Mass (g):	281
Pieces:	6
Class:	Lunar feld. Breccia
Fayalite (mol%):	25.7-27.0
Ferrosilite (mol%):	34.7,55.8
Wollastonite (mol%):	9.8,26.4
Classifier:	T. Irving, UWS
Type spec mass (g):	20
Type spec location:	UWS
Main mass:	GHupé

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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 95, MAPS 44, 429-462 (2009)

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Dominik Stoeckli

Geography:

Morocco

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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Revision
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