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Northeast Africa 028
Basic information Name: Northeast Africa 028
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 028
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 93 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 6 Oct 2021
Writeuphelp
Writeup from MB 110:

Northeast Africa 028 (NEA 028)

Libya

Purchased: 2020 Jun

Classification: Carbonaceous chondrite (CO3)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, relatively small glass-bearing chondrules (apparent diameter 200±75 µm, N = 22), zoned olivine and pyroxene fragments, and very fine grained CAI are set in a fine grained matrix (~30 vol.%, deep red-brown in thin section) containing troilite, kamacite and taenite. Pleonaste is present in some chondrules. Mineral phases in CAI include amoeboid hercynite, perovskite and Al-Ti-diopside.

Geochemistry: Olivine (Fa22.3±24.0, range Fa0.6-55.6, N = 5; Cr2O3 in ferroan olivine 0.04-0.10 wt.%, mean 0.07±0.02 wt.%, N = 6), low-Ca pyroxene (Fs2.6±1.5Wo0.9±0.2, range Fs1.3-4.2Wo0.7-1.1, N = 3), subcalcic augite (Fs6.2Wo34.9), Al-Ti-diopsde (Fs0.6Wo41.1, Al2O3 7.3 wt.%, TiO2 1.2 wt.%).

Classification: Carbonaceous chondrite (CO3).

Specimens: 21.9 g plus 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 Jun
Mass (g):93
Pieces:1
Class:CO3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):22.3±24.0
Ferrosilite (mol%):2.6±1.5
Wollastonite (mol%):0.9±0.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.9
Type spec location:UWB
Main mass:M. Arjdal
Comments:Work name Arj ZM 760; 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 1522 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

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