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Northeast Africa 023
Basic information Name: Northeast Africa 023
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 023
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 486 g
Classification
  history:
Recommended:  LL7    [explanation]

This is 1 of 71 approved meteorites classified as LL7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 25 Apr 2021
Writeuphelp
Writeup from MB 110:

Northeast Africa 023 (NEA 023)

Libya

Purchased: 2020 Apr

Classification: Ordinary chondrite (LL7)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) This fresh specimen has a poikiloblastic texture with abundant very small olivine chadacrysts enclosed by larger low-Ca pyroxene oikocrysts. No recognizable chondrules are present. Accessory phase include sodic plagioclase, augite, taenite, kamacite, troilite and merrillite. Some thin dark shock veinlets are present.

Geochemistry: Olivine (Fa29.9±0.3, range Fa29.6-30.3, N = 5), low-Ca pyroxene (Fs24.2±0.1Wo3.9±0.2, range Fs24.1-24.3Wo3.7-4.2, N = 5), augite (Fs12.1Wo40.2).

Classification: Ordinary chondrite (LL7, poikiloblastic).

Specimens: 30.3 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):486
Pieces:1
Class:LL7
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):29.9±0.3
Ferrosilite (mol%):24.2±0.1
Wollastonite (mol%):3.9±0.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):30.3
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 605; 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:
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Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1516 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

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