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Northeast Africa 020
Basic information Name: Northeast Africa 020
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 020
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 167 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  LL4-7
Recommended:  LL4-7    [explanation]

This is 1 of 8 approved meteorites classified as LL4-7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 8 Apr 2021
Writeuphelp
Writeup from MB 110:

Northeast Africa 020 (NEA 020)

Libya

Purchased: 2020 Apr

Classification: Ordinary chondrite (LL4-7)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Complex chondritic breccia comprised of discrete equilibrated chondrules plus equilibrated lithic chondrite clasts of diverse petrologic types set within a finer grained matrix containing taenite, stained kamacite, troilite and chlorapatite. Type 4 clasts have well-formed chondrules, Type 5 clasts have sparse chondrules in a recrystallized matrix, Type 6 clasts contain only rare remnant chondrules, and Type 7 clasts have triple grain junction texture and no obvious chondrules.

Geochemistry: Olivine (Fa29.1±0.4, range Fa28.4-29.3, N = 5), low-Ca pyroxene (Fs24.1±1.5Wo1.6±0.9, range Fs22.5-25.9Wo0.2-2.3, N = 4), pigeonite (Fs22.0Wo9.6), subcalcic augite (Fs14.0Wo25.2).

Classification: Ordinary chondrite (LL4-7 breccia).

Specimens: 22.0 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 Apr
Mass (g):167
Pieces:1
Class:LL4-7
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):29.1±0.4
Ferrosilite (mol%):24.1±1.5
Wollastonite (mol%):1.6±0.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.0
Type spec location:UWB
Main mass:M. Arjdal
Finder:anonymous
Comments:Work name Arj ZM 525; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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
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Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1552 approved meteorites from Libya (plus 24 unapproved names) (plus 2 impact craters)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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