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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:
Recommended:  LL4-7    [explanation]

This is 1 of 5 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, 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 1523 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

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