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Northeast Africa 038
Basic information Name: Northeast Africa 038
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 038
Observed fall: No
Year found: 2022
Country: Libya
Mass:help 3.29 kg
Classification
  history:
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 65 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northeast Africa 038 (NEA 038)

Libya

Purchased: 2022 Jun

Classification: HED achondrite (Eucrite, melt breccia)

History: Found in Libya and purchased in June 2022 by Ziyao Wang from a dealer in Ouargla, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Composed of microgabbroic eucrite clasts and related debris plus sparse regions of dark melt matrix. Both pyroxene (exsolved pigeonite) and calcic plagioclase occur as very fine grained, polycrystalline aggregates, signifying a high degree of shock experienced by this meteorite. Exsolution lamellae within pyroxenes exhibit an irregular, mottled appearance. Accessory phases include silica polymorph, ilmenite, medium-Ti chromite and troilite.

Geochemistry: Pigeonite host (Fs53.2-57.6Wo11.7-6.1, FeO/MnO = 31-35, N = 6), augite exsolution lamellae (Fs28.2-34.5Wo41.6-35.8, FeO/MnO = 31-35, N = 6), plagioclase (An89.2-90.5Or0.6-0.4, N = 3).

Classification: Eucrite melt breccia. The pyroxene and plagioclase in this Libyan specimen exhibit the same distinctive polycrystalline textures as observed in specimens of Jikharra 001, and thus pairing with that very large find is likely.

Specimens: 32.9 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Ouargla, Algeria
Date:P 2022 Jun
Mass (g):3287
Pieces:1
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):53.2-57.6; 28.2-34.5
Wollastonite (mol%):11.7-6.1; 41.6-35.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):32.9
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-118; 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)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1534 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters)

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