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Northeast Africa 021
Basic information Name: Northeast Africa 021
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 021
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 99.7 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 369 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 21 Feb 2021
Writeuphelp
Writeup from MB 110:

Northeast Africa 021 (NEA 021)

Libya

Purchased: 2020 Jan

Classification: Ordinary chondrite (LL3)

History: Purchased by Mbark Arjdal in January 2020 from a Libyan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed glass-bearing chondrules (apparent diameter 1040±640 µm, N = 25) are set in a fine grained matrix containing altered kamacite, troilite, taenite and low-Ti chromite. Calcic plagioclase is present in some chondrules.

Geochemistry: Olivine (Fa23.5±15.0, range Fa0.9-49.1, N = 10), low-Ca pyroxene (Fs17.7±8.0Wo2.8±2.0, range Fs6.5-27.8Wo0.3-6.1, N = 7), subcalcic augite (Fs26.5Wo33.5), augite (Fs15.6Wo44.6), plagioclase in chondrule (An80.2Or1.0). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.03.

Classification: Ordinary chondrite (LL3).

Specimens: 20.1 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Libya
Date:P 2020 Jan
Mass (g):99.7
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.5±15.0
Ferrosilite (mol%):17.7±8.0
Wollastonite (mol%):2.8±2.0
Magnetic suscept.:3.03
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:M. Arjdal
Finder:anonymous
Comments:Work name Arj ZM 544; submitted by A. Irving
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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1517 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

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