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Northwest Africa 1091
Basic information Name: Northwest Africa 1091
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1091
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 850 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  L4
Recommended:  L4    [explanation]

This is 1 of 1913 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 20 Oct 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 1091 (NWA 1091)

(Northwest Africa)

Purchased: 2003

Classification: Ordinary chondrite (L4)

Petrography: Several chondrules are partly surrounded by troilite-rich rims. Some metal grains contain small, irregular grains of troilite. Troilite is polycrystalline. Some metal and sulfide grains are elongated. Most chondrules are well defined, but some appear recrystallized. Some olivine grains contain planar fractures; a few olivine and low-ca pyroxene grains exhibit weak mosaic extinction.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2003
Mass (g):850
Pieces:4
Class:L4
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):23.9
Classifier:A. Rubin, UCLA
Type spec mass (g):61.10
Type spec location:UCLA
Main mass:Michael Cottingham
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)
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 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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