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Northwest Africa 12539 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12539 This is an OFFICIAL meteorite name. Abbreviation: NWA 12539 Observed fall: No Year found: 2018 Country: Algeria Mass: 516 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 522 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 12 Apr 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12539 (NWA 12539) Algeria Purchased: 2018 Mar Classification: HED achondrite (Diogenite) History: Purportedly found in Algeria and purchased in Morocco in March 2018 by Lhcen Ouabicha and Zaid Sbitti. Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of angular grains of orthopyroxene (exhibiting undulose extinction) with typical grain size 800 μm, together with accessory clinopyroxene, calcic plagioclase, silica polymorph, chromite and troilite set in a sparse finer grained matrix (~5 vol.%). No metal was observed. Geochemistry: Orthopyroxene (Fs23.6-23.7Wo2.6-1.9, FeO/MnO = 30-32, N = 3), clinopyroxene (Fs6.9-7.7Wo46.4-45.7, FeO/MnO = 25-28, N = 2), plagioclase (An81.1-82.6Or0.3, N = 2). Classification: Diogenite (breccia). Specimens: 25.1 g including one polished thin section at UWB; remainder with L. Ouabicha and Z. Sbitti. | ||||||||||||||||||||||||||||
Data from: MB108 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) 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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