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Northwest Africa 4722
Basic information Name: Northwest Africa 4722
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4722
Observed fall: No
Year found: 2006
Country: Morocco
Mass:help 294 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  LL3
Recommended:  LL3    [explanation]

This is 1 of 414 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 8 Sep 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 4722

Morocco

Find: January 2006

Ordinary chondrite (LL3)

History: Stones were purchased in Erfoud by C. Giessler in January 2006.

Physical characteristics: 48 small, crusted stones with brownish interiors, totaling 294 g.

Petrography: (M. Bourot-Denise, MNHNP) The meteorite displays a homogeneous texture with mm-sized chondrules. BSE images point to an unequilibrated chondrite, with large type II FeO-rich chondrules, and small (<500 μm in size) type I, FeO-poor chondrules. In the type I chondrules, olivines are sometimes zoned. Rare metal and sulfide occur in large nodules (100–200 μm). Terrestrial alteration has significantly affected the matrix and the opaque minerals in the matrix.

Geochemistry: Olivine, Fa13.5 ± 11.1, range Fa0.8–36.5, CaO up to 0.18, Cr2O3 = 0.15 (both wt%); low-Ca pyroxene, Fs10.3 ± 9.5, range Fs1.1–27.7. Magnetic susceptibility: (J. Gattacceca, CEREGE) logχ = 3.23 (10-9 m3/kg) is consistent with a weathered LL chondrite.

Classification: Ordinary chondrite (LL3, estimated subtype 3.4); weathering grade W3; shock stage S1.

Type specimens: A total of 24.3 g of sample (4 sawn fragments) and one polished mount are on deposit at MNHNP. C. Giessler holds the main mass.

Data from:
  MB94
  Table 2
  Line 54:
State/Prov/County:Morocco
Date:2006
Mass (g):294
Pieces:48
Class:LL3
Shock stage:S1
Weathering grade:W3
Fayalite (mol%):0.8-36.5
Ferrosilite (mol%):1.1-27.7
Classifier:M. Bourot-Denise, MNHNP
Type spec mass (g):24.3
Type spec location:MNHNP
Main mass:Giessler
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Gipo Meteorites   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Anthony James   
Charley Kettel   
Dirk Hohmann      
Gerald Armstrong Photo added 19 Apr 2022
Photo added 19 Apr 2022
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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