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Northwest Africa 4438
Basic information Name: Northwest Africa 4438
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4438
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 390 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  LL3
Recommended:  LL3    [explanation]

This is 1 of 422 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 26 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 4438 (NWA 4438)

(Northwest Africa)

Purchased: 2006

Classification: Ordinary chondrite (LL3)

History: Purchased by Marcin Cimała in 2006 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed chondrules (apparent diameter 760±300 µm, N=22) are set in a sparse, finer-grained matrix containing altered metal.

Geochemistry: Olivine (Fa23.6±11.6 (range Fa5.8-40.2, N = 6); Cr2O3 in ferroan examples 0.01-0.44 wt.%, mean 0.10±0.13 wt.%, N = 9), low-Ca pyroxene (Fs7.3Wo2.1; Fs8.8Wo2.5), subcalcic augite (Fs8.2Wo27.7).

Classification: Ordinary chondrite (LL3). LL group based on magnetic susceptibility.

Specimens: 21.6 g including one polished thin section at PSF; remainder with Mr. M. Cimała.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2006
Mass (g):390
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.6±11.6
Ferrosilite (mol%):8.1±1.1
Wollastonite (mol%):2.3±0.3
Magnetic suscept.:3.25
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):21.6
Type spec location:PSF
Main mass:M. Cimala
Comments:Work names MC013 and TB 946; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Polandmet      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
André Knöfel Photo added 19 Apr 2022
Arthur Rosen Photo added 19 Apr 2022
Gerald Armstrong Photo added 19 Apr 2022
Jean-Michel Masson Photo added 19 Apr 2022
METEORITES AUSTRALIA Photo added 19 Apr 2022
stephen dunklee   
Woreczko Jan & Wadi Photo added 19 Apr 2022
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8636 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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