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Northeast Africa 018
Basic information Name: Northeast Africa 018
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 018
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 748 g
Recommended:  LL3    [explanation]

This is 1 of 387 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 8 Apr 2021
Writeup from MB 110:

Northeast Africa 018 (NEA 018)


Purchased: 2020 Feb

Classification: Ordinary chondrite (LL3)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed glass-bearing chondrules (apparent diameter 950 ± 380 µm, N = 25) are set in a fine grained matrix containing stained kamacite, taenite, troilite, chlorapatite and low-Ti chromite. Calcic plagioclase is present in some chondrules and albitic plagioclase occurs in the matrix.

Geochemistry: Olivine (Fa22.0±9.4, range Fa0.6-28.3, N = 8), low-Ca pyroxene (Fs17.3±4.7Wo1.9±1.3, range Fs10.7-21.4Wo0.5-3.7, N = 4), pigeonite (Fs13.5Wo10.4), subcalcic augite (Fs19.8Wo32.1), Al-Ti-diopside (Fs0.8Wo53.8, Al2O3 = 11.0 wt.%, TiO2 = 2.6 wt.%). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.45.

Classification: Ordinary chondrite (LL3).

Specimens: 33.7 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  Table 0
  Line 0:
Place of purchase:Libya
Date:P 2020 Feb
Mass (g):748
Pieces:2 fitted
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):22.0±9.4
Ferrosilite (mol%):17.3±4.7
Wollastonite (mol%):1.9±1.3
Magnetic suscept.:4.45
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):33.7
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 505; submitted by A. Irving
   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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 1528 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)

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