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Northeast Africa 011 | |||||||||||||||||||||||||||||
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Basic information | Name: Northeast Africa 011 This is an OFFICIAL meteorite name. Abbreviation: NEA 011 Observed fall: No Year found: 2020 Country: Libya Mass: 161.2 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 318 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||
Comments: | Approved 27 Jun 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northeast Africa 011 (NEA 011) Libya Purchased: 2020 Jan Classification: Martian meteorite (Shergottite) History: Purchased by Mbark Arjdal in January 2020 from a Libyan dealer. Physical characteristics: Two nearly identical regmaglypted stones (total weight 161.2 g) completely coated by black fusion crust. The fresh interiors are overall gray in color, and exhibit elongate, light-gray pyroxene grains, glassy maskelynite and sparse black, glassy shock pockets. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) This aphyric specimen is notable for the large differences in grainsize among the constituent minerals. The major components are zoned clinopyroxene (as elongate prismatic grains up to 1.8 mm long) interspersed with thin lath-like maskelynite grains (up to 0.5 mm long), together with much finer grained accessory merrillite, ilmenite, titanomagnetite, pyrrhotite and interstitial K-rich alkali feldspar. Geochemistry: Pigeonite (Fs28.4-31.8Wo10.4-12.1, FeO/MnO = 28, N = 2), subcalcic augite (Fs21.7-25.5Wo35.3-28.7, FeO/MnO = 27-30, N = 2), ferroan pigeonite rims (Fs53.5-69.1Wo22.3-14.3, FeO/MnO = 37-42, N = 4), maskelynite (An44.0-47.0Or1.9-3.2, N = 3), alkali feldspar (Or68.5Ab26.4An5.2). Classification: Shergottite (aphyric). Specimens: 21.1 g including one polished thin section at UWB; remainder with Mr. M. Arjdal. | ||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 1550 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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