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Northeast Africa 012
Basic information Name: Northeast Africa 012
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 012
Observed fall: No
Year found: 2019
Country: Libya
Mass:help 635 g
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 707 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 4 Jul 2020
Writeuphelp
Writeup from MB 109:

Northeast Africa 012 (NEA 012)

Libya

Purchased: 2019 Aug

Classification: Ordinary chondrite (L3)

History: Purchased by Mbark Arjdal in August 2019 from a Libyan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Closely-packed, well-formed chondrules (apparent diameter 800±660 µm, N = 23) are set in a sparse matrix containing altered kamacite, taenite, chromite, troilite and chlorapatite.

Geochemistry: Olivine (Fa19.6±11.4, range Fa4.0-29.4, N = 4; Cr2O3 in ferroan examples 0.03-0.10 wt.%, mean 0.05±0.02 wt.%, N = 10), low-Ca pyroxene (Fs12.5±6.6Wo1.1±1.2, range Fs3.8-21.7Wo0.2-3.1, N = 5), pigeonite (Fs16.7±1.7Wo6.1±0.8, range Fs15.5-17.9Wo5.5-6.7, N = 2), augite (Fs1.8Wo49.2; Fs5.5Wo39.3; Fs12.1Wo34.9, N = 3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.63.

Classification: Ordinary chondrite (L3).

Specimens: 21.7 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Libya
Date:P 2019 Aug
Mass (g):635
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):19.6±11.4
Ferrosilite (mol%):12.5±6.6
Wollastonite (mol%):1.1±1.2
Magnetic suscept.:4.63
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.7
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 271; 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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1502 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

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