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Northeast Africa 013
Basic information Name: Northeast Africa 013
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 013
Observed fall: No
Year found: 2020
Country: Northeast Africa
Mass:help 3.25 kg
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 443 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 5 Sep 2020
Writeuphelp
Writeup from MB 109:

Northeast Africa 013 (NEA 013)

Northeast Africa

Purchased: 2020 May

Classification: Diogenite-melt rock

History: Purportedly found in Libya, purchased by Rachid Chaoui in May 2020 from a Libyan dealer, and acquired in July 2020 by Terry Boudreaux.

Physical characteristics: A single pale greenish stone (3250 g) partially coated by patchy black fusion crust. The fresh interior appears uniform and very fine grained with sparse small vesicles and tiny grains of shiny metal.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh igneous-textured specimen with sporadic small spherical vesicles (up to 0.8 mm in diameter). Composed predominantly of plumose arrays of thin laths of zoned pyroxene (up to 1.9 mm long) intergrown with calcic plagioclase. Subhedral grains of unzoned olivine (containing sparse melt inclusions) and chromite are associated with pyroxene, which exhibits compositional zoning from orthopyroxene cores to pigeonite rims. Accessory phases are silica polymorph, FeNi metal (kamacite, taenite) and troilite.

Geochemistry: Orthopyroxene cores (Fs17.6-18.5Wo0.9-1.1, FeO/MnO = 27-31, N = 3), pigeonite rims (Fs36.7-38.5Wo8.4-11.1, FeO/MnO = 31-32, N = 3), olivine (Fa33.9-39.3, FeO/MNO = 47-50, N = 4), plagioclase (An87.6-94.2Or0.7-0.2, N = 4).

Classification: Diogenite (melt rock, olivine-plagioclase-bearing, vesicular).

Specimens: 30.8 g including one polished endcut and one polished thin section at UWB; main mass with Mr. T. Boudreaux.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Libya
Date:P 2020 May
Mass (g):3250
Pieces:1
Class:Diogenite-melt rock
Shock stage:high
Weathering grade:low
Fayalite (mol%):33.9-39.3
Ferrosilite (mol%):17.7-18.5;36.7-38.5
Wollastonite (mol%):0.9-1.1; 8.4-11.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):30.8
Type spec location:UWB
Main mass:T. Boudreaux
Comments:Work name RC134.1; 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)
Boudreaux: Terry Boudreaux, Illinois, United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is the only approved meteorite from Northeast Africa

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