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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 441 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
Find references in NASA ADS:
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Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1537 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)

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