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Northwest Africa 438
Basic information Name: Northwest Africa 438
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 438
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 3 kg
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3167 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 20 Oct 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 438 (NWA 438)

(Northwest Africa)

Purchased: 2003

Classification: Ordinary chondrite (LL5)

Petrography: Chondrules are recrystallized, but readily discernable. Olivine exhibits undulose extinction, but lacks planar fractures. Chondrules range up to 1.6 mm in diameter. Many metal and troiltie grains are 200-800 ┬Ám across. Some troilite grains are polycrystalline.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2003
Mass (g):3000
Pieces:1
Class:LL5
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):26.6
Classifier:A. Rubin, UCLA
Type spec mass (g):20
Type spec location:UCLA
Main mass:Nick Gessler
Comments:Submitted by Simone de Leuw
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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