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Northeast Africa 024
Basic information Name: Northeast Africa 024
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 024
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 98.6 g
Recommended:  LL3    [explanation]

This is 1 of 452 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 10 Apr 2021
Writeup from MB 110:

Northeast Africa 024 (NEA 024)


Purchased: 2020 Aug

Classification: Ordinary chondrite (LL3)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed glass-bearing chondrules (apparent diameter 870±350 µm, N = 25) are set in a dark, fine grained matrix containing troilite and altered kamacite. Some chondrules have intermediate plagioclase present.

Geochemistry: Olivine (Fa23.1±16.7, range Fa1.9-55.2, N = 12; Cr2O3 in ferroan olivine 0.04-0.22 wt.%, mean 0.10±0.06 wt.%, N = 10), low-Ca pyroxene (Fs11.1±8.2Wo0.8±0.6, range Fs5.3-16.9Wo0.4-1.2, N = 2), pigeonite (Fs14.9±4.8Wo5.4±1.3, range Fs10.5-20.0Wo4.5-6.9, N = 3), subcalcic augite (Fs15.8±3.3Wo33.8±3.5, range Fs13.4-18.1Wo31.3-36.3, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.84.

Classification: Ordinary chondrite (LL3).

Specimens: 20.1 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 Aug
Mass (g):98.6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.1±16.7
Ferrosilite (mol%):13.4±5.7
Wollastonite (mol%):3.6±2.7
Magnetic suscept.:3.84
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 612; 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 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
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     This is 1 of 1538 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)

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