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Northeast Africa 012 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northeast Africa 012 This is an OFFICIAL meteorite name. Abbreviation: NEA 012 Observed fall: No Year found: 2019 Country: Libya Mass: 635 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 836 approved meteorites (plus 1 unapproved name) classified as L3. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 4 Jul 2020 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northeast Africa 012 (NEA 012) Libya Purchased: 2019 Aug Classification: Ordinary chondrite (L3) History: Purchased by Mbark Arjdal in August 2019 from a Libyan dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Closely-packed, well-formed chondrules (apparent diameter 800±660 µm, N = 23) are set in a sparse matrix containing altered kamacite, taenite, chromite, troilite and chlorapatite. Geochemistry: Olivine (Fa19.6±11.4, range Fa4.0-29.4, N = 4; Cr2O3 in ferroan examples 0.03-0.10 wt.%, mean 0.05±0.02 wt.%, N = 10), low-Ca pyroxene (Fs12.5±6.6Wo1.1±1.2, range Fs3.8-21.7Wo0.2-3.1, N = 5), pigeonite (Fs16.7±1.7Wo6.1±0.8, range Fs15.5-17.9Wo5.5-6.7, N = 2), augite (Fs1.8Wo49.2; Fs5.5Wo39.3; Fs12.1Wo34.9, N = 3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.63. Classification: Ordinary chondrite (L3). Specimens: 21.7 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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