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Northeast Africa 015
Basic information Name: Northeast Africa 015
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 015
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 610 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 241 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 16 Dec 2020
Writeuphelp
Writeup from MB 109:

Northeast Africa 015 (NEA 015)

Libya

Purchased: 2020 Dec

Classification: Martian meteorite (Shergottite)

History: Purportedly found in Libya, purchased by Mohammed Hmani in November 2020 from a Mauritanian dealer, and subsequently acquired by Edwin Thompson.

Physical characteristics: An elongate stone (610 g) with flat sides and rounded edges, partially covered by small patches of black fusion crust. Exterior surfaces exhibit dark brown grains set in a fine grained, pale brown groundmass. The fresh interior exhibits larger brown grains within a pale greenish-gray groundmass containing obvious glassy maskelynite.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fresh porphyritic igneous rock containing phenocrysts of olivine (up to 2.2 mm) in a groundmass of zoned subcalcic augite and maskelynite plus accessory chromite (with variable Ti content), merrillite, chlorapatite, pyrrhotite and pentlandite. Secondary calcite, gypsum and halite are present in microfractures, some of which cut the fusion crust.

Geochemistry: Olivine (Fa30.9-38.7, FeO/MnO = 50-55, N = 6), subcalcic augite (Fs7.4-12.4Wo24.6-30.7, FeO/MnO = 29-32, N = 6), maskelynite (An62.2-63.1Or0.5, N = 2).

Classification: Shergottite (olivine-phyric).

Specimens: 24.1 g including one polished thin section and one polished thick section at UWB; remainder with E. Thompson.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Paris
Date:P 2020 Dec
Mass (g):610
Pieces:1
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):30.9-38.7
Ferrosilite (mol%):7.4-12.4
Wollastonite (mol%):24.6-30.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.1
Type spec location:UWB
Main mass:Edwin Thompson
Comments:Work name MH-Q9; 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)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, 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:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1509 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

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